Problem Description
As a cheap labor in a small company, LL has to ride back and forth between school and office every day. It is a tedious trip. So he want to design the most satisfactory riding route. After several day's experiment, he draw the simple map. It contains n*m areas. The school is in (0,0) while the office is in (n-1,m-1). He also record the scenery rank of each area A(i,j) and the time need to ride through each area B(i,j). ( For the start and end, A(0,0), B(0,0), A(n-1,m-1), B(n-1,m-1) are always 0. ) Now, LL defines the satisfactory degree of a round trip as follow:

``````                                   ∑{ A(i,j) | Area (i,j) is in the riding route (come or go). }
``````

the satisfactory degree = ----------------------------------------------------------------------
∑{ B(i,j) | Area (i,j) is in the riding route (come or go). }

Attention: 1. LL doesn't want to make a detour. So, from school to office he only ride rightward or downward and from office to school only leftward or upward.
2. LL won't pass the same area in the whole round trip except the start and end.

Input
Each test case begins with two integers n,m ( 3<=n,m<=30 ), which is the size of the map. Then n lines follow, each contains m integers A(i,j). Another n lines follow, each contains m integers B(i,j). 1 <= A(i,j),B(i,j) <= 100.

Output
For each case, Output the maximal satisfactory degree he can get in a round trip.

Sample Input
3 3
0 1 2
3 4 5
6 7 0
0 7 6
5 4 3
2 1 0

Sample Output
13/11

Problem Description Ice Rain------I was waiting for a girl, or waiting for been addicted to the bitter sea. Love for irrigation in silence. No one considered whether the flowers came out or wither. Love which I am not sure swing left and right. I had no choice but to put my sadness into my heart deeply. Yifenfei was waiting for a girl come out, but never. His love is caught by Lemon Demon. So yifenfei ’s heart is “Da Xue Fen Fei” like his name. The weather is cold. Ice as quickly as rain dropped. Lemon said to yifenfei, if he can solve his problem which is to calculate the value of , he will release his love. Unluckily, yifenfei was bored with Number Theory problem, now you, with intelligent, please help him to find yifenfei’s First Love. Input Given two integers n, k(1 <= n, k <= 109). Output For each n and k, print Ice(n, k) in a single line. Sample Input 5 4 5 3 Sample Output 5 7

Problem Description Write a program to determine the summation of several sets of integers. Input The input file will consist of up to 250 sets of integers, where each set contains at most 100 integers and the integer values will be between –16000 and + 16000. Each set of numbers is started with the number of integers in the set, n. The next n input lines will each contain one integer of the set. You should stop processing when the size of the set, n, is<= 0. Output A single line of output should be generated for each set of integers. The line should have format shown below. Sample Input 4 -1 3 1 1 2 19 17 5 -645 952 -1488 -5456 -9342 -1 Sample Output Sum of #1 is 4 Sum of #2 is 36 Sum of #3 is -15979

Problem Description A subsum of the sequence is sum of one or more consecutive integers of it. You are given an integer N(1≤N≤2000 ). Your task is to make a sequence of integers which are less than 3(N+6), such that its all subsums (N(N+1)/2 in total) are different from each other. Input There are several test cases. The first line of the input contains an integer T(1≤T≤200), the number of test cases. Each of the next T lines contains an integer ,N the length of the sequence. Output For each test case, print one line with N space separated integers representing your sequence. If multiple solutions exist, any of them will be accepted. Sample Input 2 2 5 Sample Output 1 2 1 2 4 8 16

Problem Description As a cheap labor in a small company, LL has to ride back and forth between school and office every day. It is a tedious trip. So he want to design the most satisfactory riding route. After several day's experiment, he draw the simple map. It contains n*m areas. The school is in (0,0) while the office is in (n-1,m-1). He also record the scenery rank of each area A(i,j) and the time need to ride through each area B(i,j). ( For the start and end, A(0,0), B(0,0), A(n-1,m-1), B(n-1,m-1) are always 0. ) Now, LL defines the satisfactory degree of a round trip as follow: ∑{ A(i,j) | Area (i,j) is in the riding route (come or go). } the satisfactory degree = ---------------------------------------------------------------------- ∑{ B(i,j) | Area (i,j) is in the riding route (come or go). } Attention: 1. LL doesn't want to make a detour. So, from school to office he only ride rightward or downward and from office to school only leftward or upward. 2. LL won't pass the same area in the whole round trip except the start and end. Input Each test case begins with two integers n,m ( 3<=n,m<=30 ), which is the size of the map. Then n lines follow, each contains m integers A(i,j). Another n lines follow, each contains m integers B(i,j). 1 <= A(i,j),B(i,j) <= 100. Output For each case, Output the maximal satisfactory degree he can get in a round trip. Sample Input 3 3 0 1 2 3 4 5 6 7 0 0 7 6 5 4 3 2 1 0 Sample Output 13/11

Problem Description As a cheap labor in a small company, LL has to ride back and forth between school and office every day. It is a tedious trip. So he want to design the most satisfactory riding route. After several day's experiment, he draw the simple map. It contains n*m areas. The school is in (0,0) while the office is in (n-1,m-1). He also record the scenery rank of each area A(i,j) and the time need to ride through each area B(i,j). ( For the start and end, A(0,0), B(0,0), A(n-1,m-1), B(n-1,m-1) are always 0. ) Now, LL defines the satisfactory degree of a round trip as follow: ∑{ A(i,j) | Area (i,j) is in the riding route (come or go). } the satisfactory degree = ---------------------------------------------------------------------- ∑{ B(i,j) | Area (i,j) is in the riding route (come or go). } Attention: 1. LL doesn't want to make a detour. So, from school to office he only ride rightward or downward and from office to school only leftward or upward. 2. LL won't pass the same area in the whole round trip except the start and end. Input Each test case begins with two integers n,m ( 3<=n,m<=30 ), which is the size of the map. Then n lines follow, each contains m integers A(i,j). Another n lines follow, each contains m integers B(i,j). 1 <= A(i,j),B(i,j) <= 100. Output For each case, Output the maximal satisfactory degree he can get in a round trip. Sample Input 3 3 0 1 2 3 4 5 6 7 0 0 7 6 5 4 3 2 1 0 Sample Output 13/11

Problem Description We once did a lot of recursional problem . I think some of them is easy for you and some if hard for you. Now there is a very easy problem . I think you can AC it. We can define sum(n) as follow: if i can be divided exactly by 3 sum(i) = sum(i-1) + i*i*i;else sum(i) = sum(i-1) + i; Is it very easy ? Please begin to program to AC it..-_- Input The input file contains multilple cases. Every cases contain only ont line, every line contains a integer n (n<=100000). when n is a negative indicate the end of file. Output output the result sum(n). Sample Input 1 2 3 -1 Sample Output 1 3 30
Java数组相加求和的问题，用循环怎么实现的，谁有代码的例子编写下
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Problem Description 有一个长度为n(n<=100)的数列，该数列定义为从2开始的递增有序偶数，现在要求你按照顺序每m个数求出一个平均值，如果最后不足m个，则以实际数量求平均值。编程输出该平均值序列。 Input 输入数据有多组，每组占一行，包含两个正整数n和m，n和m的含义如上所述。 Output 对于每组输入数据，输出一个平均值序列，每组输出占一行。 Sample Input 3 2 4 2 Sample Output 3 6 3 7

Problem Description 多项式的描述如下： 1 - 1/2 + 1/3 - 1/4 + 1/5 - 1/6 + ... 现在请你求出该多项式的前n项的和。 Input 输入数据由2行组成，首先是一个正整数m（m<100），表示测试实例的个数，第二行包含m个正整数，对于每一个整数(不妨设为n,n<1000），求该多项式的前n项的和。 Output 对于每个测试实例n，要求输出多项式前n项的和。每个测试实例的输出占一行，结果保留2位小数。 Sample Input 2 1 2 Sample Output 1.00 0.50

Problem Description There is a directed acyclic graph with n vertices and m edges. You are allowed to delete exact k edges in such way that the lexicographically minimal topological sort of the graph is minimum possible. 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 three integers n, m and k (1≤n≤100000,0≤k≤m≤200000) -- the number of vertices, the number of edges and the number of edges to delete. For the next m lines, each line contains two integers ui and vi, which means there is a directed edge from ui to vi (1≤ui,vi≤n). You can assume the graph is always a dag. The sum of values of n in all test cases doesn't exceed 106. The sum of values of m in all test cases doesn't exceed 2×106. Output For each test case, output an integer S=(∑i=1ni⋅pi) mod (109+7), where p1,p2,...,pn is the lexicographically minimal topological sort of the graph. Sample Input 3 4 2 0 1 2 1 3 4 5 1 2 1 3 1 4 1 2 3 2 4 4 4 2 1 2 2 3 3 4 1 4 Sample Output 30 27 30

Problem Description A checksum is an algorithm that scans a packet of data and returns a single number. The idea is that if the packet is changed, the checksum will also change, so checksums are often used for detecting transmission errors, validating document contents, and in many other situations where it is necessary to detect undesirable changes in data. For this problem, you will implement a checksum algorithm called Quicksum. A Quicksum packet allows only uppercase letters and spaces. It always begins and ends with an uppercase letter. Otherwise, spaces and letters can occur in any combination, including consecutive spaces. A Quicksum is the sum of the products of each character's position in the packet times the character's value. A space has a value of zero, while letters have a value equal to their position in the alphabet. So, A=1, B=2, etc., through Z=26. Here are example Quicksum calculations for the packets "ACM" and "MID CENTRAL": ACM: 1*1 + 2*3 + 3*13 = 46MID CENTRAL: 1*13 + 2*9 + 3*4 + 4*0 + 5*3 + 6*5 + 7*14 + 8*20 + 9*18 + 10*1 + 11*12 = 650 Input The input consists of one or more packets followed by a line containing only # that signals the end of the input. Each packet is on a line by itself, does not begin or end with a space, and contains from 1 to 255 characters. Output For each packet, output its Quicksum on a separate line in the output. Sample Input ACM MID CENTRAL REGIONAL PROGRAMMING CONTEST ACN A C M ABC BBC # Sample Output 46 650 4690 49 75 14 15

Problem Description The cows in farmer John's herd are numbered and branded with consecutive integers from 1 to N (1 <= N <= 10,000,000). When the cows come to the barn for milking, they always come in sequential order from 1 to N. Farmer John, who majored in mathematics in college and loves numbers, often looks for patterns. He has noticed that when he has exactly 15 cows in his herd, there are precisely four ways that the numbers on any set of one or more consecutive cows can add up to 15 (the same as the total number of cows). They are: 15, 7+8, 4+5+6, and 1+2+3+4+5. When the number of cows in the herd is 10, the number of ways he can sum consecutive cows and get 10 drops to 2: namely 1+2+3+4 and 10. Write a program that will compute the number of ways farmer John can sum the numbers on consecutive cows to equal N. Do not use precomputation to solve this problem. Input * Line 1: A single integer: N Output * Line 1: A single integer that is the number of ways consecutive cow brands can sum to N. Sample Input 15 Sample Output 4

Problem Description 有一个长度为n(n<=100)的数列，该数列定义为从2开始的递增有序偶数，现在要求你按照顺序每m个数求出一个平均值，如果最后不足m个，则以实际数量求平均值。编程输出该平均值序列。 Input 输入数据有多组，每组占一行，包含两个正整数n和m，n和m的含义如上所述。 Output 对于每组输入数据，输出一个平均值序列，每组输出占一行。 Sample Input 3 2 4 2 Sample Output 3 6 3 7

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