Problem Description

A(x)B(x)=∑n+ms=0(∑i+j=saibj)%P×xs

f(x)=(x−λ1)l1(x−λ2)l2..(x−λm)lm.
（因为数据就是这么造的。）

Input

Output

Sample Input
3
5
998241761 3024 998243057 264 998244327 1
5
0 0 0 64 998244337 1
5
998233985 8208 998241761 408 998244321 1

Sample Output
2
2 1
6 4
2
8 2
0 3
2
8 1
6 4

Problem Description Li Zhixiang have already been in “Friendship” ocean-going freighter for three months. The excitement has gradually disappeared. He stands on the board, holding the railing and watching the dazzling ocean in the sun silently. Day after day, the same scenery is monotonous and tasteless, even the merry seagulls following the freighter cannot arouse his interest. Hearing the footsteps behind, he turns back to see the old captain is coming towards him. The captain has understood his idea, however, he starts a new topic with the young man. “Do you know how far our voyage is?” The captain asks. Li Zhixiang feels ashamed because he can not answer. Then the captain says with a smile, “5050 miles. Do you still remember the story of 5050?” This time the young man really blushes. The old captain continues saying:” You definitely know the story of 5050. When the German mathematician, “the prince of mathematicians”, Gauss was 10 years old …” Young man remembers this story and goes on to tell, “ When Gauss was 10 years old, he could add a list of integers from 1 to 100 in a few seconds, which shocked the teachers.” The old captain adds, “Gauss has many other stories like this. When he entered the university at the age of 17, he was able to construct heptadecagon by compass and straightedge. His university teachers were also impressed by his ability. Not only could college graduate students fail to do it, but also they felt hard to understand Gauss’s constructing process.” At this time, vice-captain greets the old captain. The old captain says to Li Zhixiang: “Come over to my office tonight, let’s continue the conversation.” It is still calm and tranquil in the evening. The freighter travels smoothly on the sea in the silver moonlight. The captain tells the young man the following words. Among the mathematicians through the ages, there are three greatest mathematicians: Archimedes, Newton and Gauss. Most of Gauss’s mathematical achievements are difficult to understand. Nevertheless, there are some comparatively easy. For instance, when it comes to solving multivariate system of linear equations, there is a solution called “Gauss Elimination”. In the navigation business, many problems can be solved by “Gauss elimination”. If you are interested in it, I will show you a simple question. Try it.” Input There are several test cases. In the first line of each case, a number n indicates that there are n equations. The following n lines, each line has n+1 numbers, ai1,ai2,ai3…..ain, bi(1<= i <=n), these numbers indicate the coefficients of systems of the equations. ai1*x1+ai2*x2+......ain*xn=bi. Input is terminated by the end of file. Output For each given systems of equations, if there are solutions, output n solutions in the order of appearance in the equations（n<=100）, each solution number is in one line. If solution is not integer, show it in fraction. If no solution, output “No solution.” Leave a blank line after each case. Sample Input 2 1000000000000000000000000 1000000000000000000000000 1000000000000000000000000 -1000000000000000000000000 1000000000000000000000000 0 1 0 4 Sample Output 1/2 1/2 No solution.

Problem Description The rules for calculating the taxi fares are quite complex. Many factors are to be considered in computing the taxi fares, including the length of the trip, the time of the day, the speed, etc. Every morning Bianca Bennett uses taxi to get to her office, she thinks if taximeters are programmed correctly. One day, she decided to write a program to calculate the taxi fares to check this. Imagine a taxi passes through a sequence of streets S1, S2, ..., Sn in order. The length of Si is Li and it is assumed that the taxi travels in a constant speed and it takes Mi minutes to travel one kilometer in Si. To make it simple, assume the passenger gets in at the start of a street Si and gets out at the end of the destination street Sj (i.e., he does not get in or out in the middle of a street). The passenger is charged for each kilometer of the trip. The first ten kilometers of the trip cost 1000 Rials each. The next 20 kilometers (from 11 to 30) cost 250 Rials each. After that, each kilometer costs 100 Rials. During the night, the fare is increased by 20%. The rule is that for each kilometer, if the taxi travels at least one minute during the time interval [12 AM, 6 AM], that kilometer will cost 20% more. Since driving in a heavy traffic costs more, if the average speed of the taxi is less than 30 km/h during the whole trip, the fare is increased by 10%. Input The input consists of multiple test cases. The first part of each test case is the sequence of streets the taxi travels. This comes in several lines, each describing one street in the form of street-name length min. street-name is a unique string of at most 20 letters and digits with no blank in it, and length and min are two positive integer numbers which are Li; (measured in kilometers, at most 200) and Mi (measured in minutes) respectively. Each street is visited once by the taxi. The first part of the test case is terminated by a line containing a single \$ character. The second part of the test case contains a single line of the form source-street dest-street time. The first two items are the names of the source and the destination streets respectively. The third item is the time the passenger gets in which is in standard 24-hours format (HH:MM). There is a line containing a single # character at the end of each test case. You may assume that the source and the destination streets belong to the input sequence of streets and the destination street does not come before the source street. The last line of the input contains two dash characters as shown in the sample input. Output For each test case, output a line containing the fare of the passenger's trip. Sample Input Khayyam 10 35 15thKhordad 50 15 Pamenar 15 40 \$ Khayyam Pamenar 07:15 # Jenah 10 40 Nouri 50 70 Hemmat 30 25 Chamran 80 80 ValieAsr 30 20 \$ Nouri ValieAsr 23:30 # -- Sample Output 21758 36432

Problem Description When Tonyfang was studying monotonous queues, he came across the following problem: For a permutation of length n a1,a2...an, define li as maximum x satisfying x<i and ax>ai, or 0 if such x not exists, ri as minimum x satisfying x>i and ax>ai, or n+1 if not exists. Output ∑ni=1min(i−li,ri−i). Obviously, this problem is too easy for Tonyfang. So he thought about a harder version: Given two integers n and x, counting the number of permutations of 1 to n which ∑ni=1min(i−li,ri−i)=x where l and r are defined as above, output the number mod P. Tonyfang solved it quickly, now comes your turn! Input In the first line, before every test case, an integer P. There are multiple test cases, please read till the end of input file. For every test case, a line contain three integers n and x, separated with space. 1≤n≤200,1≤x≤109. P is a prime and 108≤P≤109, No more than 10 test cases. Output For every test case, output the number of valid permutations modulo P. Sample Input 998244353 3 4 3 233 Sample Output 2 0

Problem Description The rules for calculating the taxi fares are quite complex. Many factors are to be considered in computing the taxi fares, including the length of the trip, the time of the day, the speed, etc. Every morning Bianca Bennett uses taxi to get to her office, she thinks if taximeters are programmed correctly. One day, she decided to write a program to calculate the taxi fares to check this. Imagine a taxi passes through a sequence of streets S1, S2, ..., Sn in order. The length of Si is Li and it is assumed that the taxi travels in a constant speed and it takes Mi minutes to travel one kilometer in Si. To make it simple, assume the passenger gets in at the start of a street Si and gets out at the end of the destination street Sj (i.e., he does not get in or out in the middle of a street). The passenger is charged for each kilometer of the trip. The first ten kilometers of the trip cost 1000 Rials each. The next 20 kilometers (from 11 to 30) cost 250 Rials each. After that, each kilometer costs 100 Rials. During the night, the fare is increased by 20%. The rule is that for each kilometer, if the taxi travels at least one minute during the time interval [12 AM, 6 AM], that kilometer will cost 20% more. Since driving in a heavy traffic costs more, if the average speed of the taxi is less than 30 km/h during the whole trip, the fare is increased by 10%. Input The input consists of multiple test cases. The first part of each test case is the sequence of streets the taxi travels. This comes in several lines, each describing one street in the form of street-name length min. street-name is a unique string of at most 20 letters and digits with no blank in it, and length and min are two positive integer numbers which are Li; (measured in kilometers, at most 200) and Mi (measured in minutes) respectively. Each street is visited once by the taxi. The first part of the test case is terminated by a line containing a single \$ character. The second part of the test case contains a single line of the form source-street dest-street time. The first two items are the names of the source and the destination streets respectively. The third item is the time the passenger gets in which is in standard 24-hours format (HH:MM). There is a line containing a single # character at the end of each test case. You may assume that the source and the destination streets belong to the input sequence of streets and the destination street does not come before the source street. The last line of the input contains two dash characters as shown in the sample input. Output For each test case, output a line containing the fare of the passenger's trip. Sample Input Khayyam 10 35 15thKhordad 50 15 Pamenar 15 40 \$ Khayyam Pamenar 07:15 # Jenah 10 40 Nouri 50 70 Hemmat 30 25 Chamran 80 80 ValieAsr 30 20 \$ Nouri ValieAsr 23:30 # -- Sample Output 21758 36432

Problem Description The rules for calculating the taxi fares are quite complex. Many factors are to be considered in computing the taxi fares, including the length of the trip, the time of the day, the speed, etc. Every morning Bianca Bennett uses taxi to get to her office, she thinks if taximeters are programmed correctly. One day, she decided to write a program to calculate the taxi fares to check this. Imagine a taxi passes through a sequence of streets S1, S2, ..., Sn in order. The length of Si is Li and it is assumed that the taxi travels in a constant speed and it takes Mi minutes to travel one kilometer in Si. To make it simple, assume the passenger gets in at the start of a street Si and gets out at the end of the destination street Sj (i.e., he does not get in or out in the middle of a street). The passenger is charged for each kilometer of the trip. The first ten kilometers of the trip cost 1000 Rials each. The next 20 kilometers (from 11 to 30) cost 250 Rials each. After that, each kilometer costs 100 Rials. During the night, the fare is increased by 20%. The rule is that for each kilometer, if the taxi travels at least one minute during the time interval [12 AM, 6 AM], that kilometer will cost 20% more. Since driving in a heavy traffic costs more, if the average speed of the taxi is less than 30 km/h during the whole trip, the fare is increased by 10%. Input The input consists of multiple test cases. The first part of each test case is the sequence of streets the taxi travels. This comes in several lines, each describing one street in the form of street-name length min. street-name is a unique string of at most 20 letters and digits with no blank in it, and length and min are two positive integer numbers which are Li; (measured in kilometers, at most 200) and Mi (measured in minutes) respectively. Each street is visited once by the taxi. The first part of the test case is terminated by a line containing a single \$ character. The second part of the test case contains a single line of the form source-street dest-street time. The first two items are the names of the source and the destination streets respectively. The third item is the time the passenger gets in which is in standard 24-hours format (HH:MM). There is a line containing a single # character at the end of each test case. You may assume that the source and the destination streets belong to the input sequence of streets and the destination street does not come before the source street. The last line of the input contains two dash characters as shown in the sample input. Output For each test case, output a line containing the fare of the passenger's trip. Sample Input Khayyam 10 35 15thKhordad 50 15 Pamenar 15 40 \$ Khayyam Pamenar 07:15 # Jenah 10 40 Nouri 50 70 Hemmat 30 25 Chamran 80 80 ValieAsr 30 20 \$ Nouri ValieAsr 23:30 # -- Sample Output 21758 36432

Problem Description The rules for calculating the taxi fares are quite complex. Many factors are to be considered in computing the taxi fares, including the length of the trip, the time of the day, the speed, etc. Every morning Bianca Bennett uses taxi to get to her office, she thinks if taximeters are programmed correctly. One day, she decided to write a program to calculate the taxi fares to check this. Imagine a taxi passes through a sequence of streets S1, S2, ..., Sn in order. The length of Si is Li and it is assumed that the taxi travels in a constant speed and it takes Mi minutes to travel one kilometer in Si. To make it simple, assume the passenger gets in at the start of a street Si and gets out at the end of the destination street Sj (i.e., he does not get in or out in the middle of a street). The passenger is charged for each kilometer of the trip. The first ten kilometers of the trip cost 1000 Rials each. The next 20 kilometers (from 11 to 30) cost 250 Rials each. After that, each kilometer costs 100 Rials. During the night, the fare is increased by 20%. The rule is that for each kilometer, if the taxi travels at least one minute during the time interval [12 AM, 6 AM], that kilometer will cost 20% more. Since driving in a heavy traffic costs more, if the average speed of the taxi is less than 30 km/h during the whole trip, the fare is increased by 10%. Input The input consists of multiple test cases. The first part of each test case is the sequence of streets the taxi travels. This comes in several lines, each describing one street in the form of street-name length min. street-name is a unique string of at most 20 letters and digits with no blank in it, and length and min are two positive integer numbers which are Li; (measured in kilometers, at most 200) and Mi (measured in minutes) respectively. Each street is visited once by the taxi. The first part of the test case is terminated by a line containing a single \$ character. The second part of the test case contains a single line of the form source-street dest-street time. The first two items are the names of the source and the destination streets respectively. The third item is the time the passenger gets in which is in standard 24-hours format (HH:MM). There is a line containing a single # character at the end of each test case. You may assume that the source and the destination streets belong to the input sequence of streets and the destination street does not come before the source street. The last line of the input contains two dash characters as shown in the sample input. Output For each test case, output a line containing the fare of the passenger's trip. Sample Input Khayyam 10 35 15thKhordad 50 15 Pamenar 15 40 \$ Khayyam Pamenar 07:15 # Jenah 10 40 Nouri 50 70 Hemmat 30 25 Chamran 80 80 ValieAsr 30 20 \$ Nouri ValieAsr 23:30 # -- Sample Output 21758 36432

Problem Description There are n nodes, you should write a program to calculate how many way to form a rooted tree. This tree must satisfy two following conditions: 1: This tree should contain all the n nodes. 2: The size of subtree whose root is node i, should be from li to ri. Give you li and ri, you should output the answer. Input There are several cases, First is the number of cases T. (There are most ten cases). For each case, in the first line is a integer n (1≤n≤14). In following n line, each line has two integers li,ri(1≤li≤ri≤n). Output For each case output the answer modulo 109+7. Sample Input 2 3 1 3 1 3 1 3 3 1 1 2 2 3 3 Sample Output 9 1

Problem Description Garfield applied for a good job recently, and he will go to work soon by car or bus. Garfield is very broody, sometimes when he sits on the bus to wait for the traffic light, he thinks about how long all the buses pass the traffic turning. Now we describe the situations when the buses stop at the traffic turning to wait for the traffic light. First the light is red, then when the light changes to green, all the buses are prepared to move. And at the beginning, all the buses are close to each other without any space, and they have different lengths and the largest speeds. We assume any car can reach the speed that isn’t beyond the maximal speed at once. Now Garfield wants you to calculate minimal time all the buses pass the turning. Input There are many cases. For each case, there is two intergers N(1<=N<=100), representing the number of the buses. There are two interges in the following N lines, for the length Li(meter, 1<=Li<=10) and the maximal speed Si(meter/second, 1<=Si<=10) of the i-th bus. Output For each case, print the result obtaining two digits after the decimal point. Sample Input 2 1 2 2 3 Sample Output 1.50

Problem Description Chiaki has an array of n positive integers. You are told some facts about the array: for every two elements ai and aj in the subarray al..r (l≤i<j≤r), ai≠aj holds. Chiaki would like to find a lexicographically minimal array which meets the facts. Input There are multiple test cases. The first line of input contains an integer T, indicating the number of test cases. For each test case: The first line contains two integers n and m (1≤n,m≤105) -- the length of the array and the number of facts. Each of the next m lines contains two integers li and ri (1≤li≤ri≤n). It is guaranteed that neither the sum of all n nor the sum of all m exceeds 106. Output For each test case, output n integers denoting the lexicographically minimal array. Integers should be separated by a single space, and no extra spaces are allowed at the end of lines. Sample Input 3 2 1 1 2 4 2 1 2 3 4 5 2 1 3 2 4 Sample Output 1 2 1 2 1 2 1 2 3 1 1

Problem Description Mr. Zstu and Mr. Hdu are taking a boring class , Mr. Zstu comes up with a problem to kill time, Mr. Hdu thinks it’s too easy, he solved it very quickly, what about you guys? Here is the problem: Give you two sequences L1,L2,...,Ln and R1,R2,...,Rn. Your task is to find a longest subsequence v1,v2,...vm satisfies v1≥1,vm≤n,vi<vi+1 .(for i from 1 to m - 1) Lvi≥Lvi+1,Rvi≤Rvi+1(for i from 1 to m - 1) If there are many longest subsequence satisfy the condition, output the sequence which has the smallest lexicographic order. Input There are several test cases, each test case begins with an integer n. 1≤n≤50000 Both of the following two lines contain n integers describe the two sequences. 1≤Li,Ri≤109 Output For each test case ,output the an integer m indicates the length of the longest subsequence as described. Output m integers in the next line. Sample Input 5 5 4 3 2 1 6 7 8 9 10 2 1 2 3 4 Sample Output 5 1 2 3 4 5 1 1

Problem Description After an uphill battle, General Li won a great victory. Now the head of state decide to reward him with honor and treasures for his great exploit. One of these treasures is a necklace made up of 26 different kinds of gemstones, and the length of the necklace is n. (That is to say: n gemstones are stringed together to constitute this necklace, and each of these gemstones belongs to only one of the 26 kinds.) In accordance with the classical view, a necklace is valuable if and only if it is a palindrome - the necklace looks the same in either direction. However, the necklace we mentioned above may not a palindrome at the beginning. So the head of state decide to cut the necklace into two part, and then give both of them to General Li. All gemstones of the same kind has the same value (may be positive or negative because of their quality - some kinds are beautiful while some others may looks just like normal stones). A necklace that is palindrom has value equal to the sum of its gemstones' value. while a necklace that is not palindrom has value zero. Now the problem is: how to cut the given necklace so that the sum of the two necklaces's value is greatest. Output this value. Input The first line of input is a single integer T (1 ≤ T ≤ 10) - the number of test cases. The description of these test cases follows. For each test case, the first line is 26 integers: v1, v2, ..., v26 (-100 ≤ vi ≤ 100, 1 ≤ i ≤ 26), represent the value of gemstones of each kind. The second line of each test case is a string made up of charactor 'a' to 'z'. representing the necklace. Different charactor representing different kinds of gemstones, and the value of 'a' is v1, the value of 'b' is v2, ..., and so on. The length of the string is no more than 500000. Output Output a single Integer: the maximum value General Li can get from the necklace. Sample Input 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 aba 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 acacac Sample Output 1 6

Problem Description 小A有一个含有n个非负整数的数列与m个区间。每个区间可以表示为li,ri。 它想选择其中k个区间， 使得这些区间的交的那些位置所对应的数的和最大。 例如样例中，选择[2,5]与[4,5]两个区间就可以啦。 Input 多组测试数据 第一行三个数n,k,m(1≤n≤100000,1≤k≤m≤100000)。 接下来一行n个数ai，表示lyk的数列(0≤ai≤109)。 接下来m行，每行两个数li,ri，表示每个区间(1≤li≤ri≤n)。 Output 一行表示答案 Sample Input 5 2 3 1 2 3 4 6 4 5 2 5 1 4 Sample Output 10

``` <ul id="test"> <li >1</li> <li >21</li> <li >12</li> </ul> ``` 大佬们呢 基础都忘穿了 求教学

C# webBrowser 获取网页中的li标签的数目

Problem Description The International Committee for Programmable Clocks (ICPC) recently ran into an absolutely catastrophic disaster. A member from their rivalry — Advanced Clock Machinery (ACM) broke into ICPC’s headquarters! The security guards were quick to act but still unable to take him down before he shot at ICPC’s most valuable assets — clocks, with his powerful railgun. As a consequence, the hour hands on these clocks are now pointing to incorrect positions. You are now hired to help them salvage the clocks by restoring them to their initial states, which is 12 o’clock. To formalize this problem, initially ICPC has n(n≤8) clocks laid sequentially on your table, with hour hands pointing to arbitrary positions from 1 to 12. You are given a set of m tools (m≤4). With tool i (denoted by (li,xi)), you can first choose a segment of li clocks, then rotate their hour hands. If xi is positive, then tool i rotates the hour hands by xi clockwise. If xi is negative, then tool i rotates the hour hands by -xi counter-clockwise. The cost of using any tool is 1, and you may use the same tool more than once. However, you may rearrange the order of the clocks without any cost. So now you are wondering: What is the minimum cost require to restore all the clocks? Input Input contains multiple test cases. There will be no more than 60 test cases. The first line in the input file contains a positive integer T, indicating the number of test cases to follow. Each test case starts with two integers n and m on the first line, where 1≤n≤8 and 1≤m≤4. n is the number of clocks ICPC has and m is the number of tools you have. You may assume that there are at most 45 test cases containing n=8, and the minimum costs are at most 8 in at least two thirds of these test cases. The next line contains n integers h1,...,hn∈{1,...,12}, denoting where the hour hands are pointing to initially. The last m lines provide information regarding the tools you have. The i−th one contains two integers li and xi where 1≤li≤n and −11≤xi≤11. The explanation of which are given in the problem description. Output For each test case, output the minimum cost in a single line. If there is no solution or the answer is greater than 8, output −1. Sample Input 2 4 2 7 10 7 9 3 2 3 3 2 1 4 5 1 -1 Sample Output 2 -1

Problem Description 小A有一个含有n个非负整数的数列与m个区间。每个区间可以表示为li,ri。 它想选择其中k个区间， 使得这些区间的交的那些位置所对应的数的和最大。 例如样例中，选择[2,5]与[4,5]两个区间就可以啦。 Input 多组测试数据 第一行三个数n,k,m(1≤n≤100000,1≤k≤m≤100000)。 接下来一行n个数ai，表示lyk的数列(0≤ai≤109)。 接下来m行，每行两个数li,ri，表示每个区间(1≤li≤ri≤n)。 Output 一行表示答案 Sample Input 5 2 3 1 2 3 4 6 4 5 2 5 1 4 Sample Output 10
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