- 题目描述: Given S, a set of integers, find the largest d such that a + b + c = d where a, b, c, and d are distinct elements of S
- 解答要求: 语言:C,时间限制:1000ms, 内存限制:64MB。
- 输入: Several S, each consisting of a line containing an integer 1 <= n <= 1000 indicating the number of elements in S, followed by the elements of S, one per line. Each element of S is a distinct integer between -536870912 and +536870911 inclusive. The last line of input contains 0.
输出:
For each S, a single line containing d, or a single line containing “no solution”.样例
输入样例
5
2
3
5
7
12
5
2
16
64
256
1024
0
输出样例
12
no solution
求助!!c语言编程求解。
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1条回答 默认 最新
- threenewbee 2019-09-09 21:46关注
#include<stdio.h> #include<string.h> #include<algorithm> #define INF -0x3f3f3f3f using namespace std; int a[1010]; int main() { int n; int i,j; while(scanf("%d",&n),n) { for(i=0;i<n;i++) scanf("%d",&a[i]); sort(a,a+n); int ans=INF; for(i=n-1;i>=0;i--) { for(j=n-1;j>=0;j--) { if(i==j) continue; int sum=a[i]-a[j]; int l=0,r=j-1; while(l<r) { if(a[l]+a[r]==sum) { ans=a[i]; break; } if(a[l]+a[r]>sum) r--; else l++; } if(ans!=INF) break; } if(ans!=INF) break; } if(ans==INF) printf("no solution\n"); else printf("%d\n",ans); } return 0; }
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