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此题与2479不是一回事这道题题目描述与2479几乎一样,但从ac的代码来看根本不是一回事。首先2593网上贴出的ac代码连2479的sample input都不能过。从网上ac的代码来推测本题意图发现此题是一个毫无意义的水题(有些水题还是有些意义的)。 下面是我ac的代码(从我代码可以清晰看出本题实际意图) #include <iostream> #include <stdio.h> using namespace std; int cmp ( const void *a , const void *b ) { return *(int *)b - *(int *)a; } int main() { int sum,n,flag,i,a[100010]; while (1) { sum=0; flag=0; scanf("%d",&n); if (n==0) break; for (i=0;i<n;i++) { scanf("%d",&a[i]); if (a[i]>0) { flag++; sum+=a[i]; } } if (flag==0||flag==1) { qsort(a,n,sizeof(a[0]),cmp); printf("%d\n",a[0]+a[1]); } else printf("%d\n",sum); } return 0; } Followed by:
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