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难道是我错误理解题意了?我的解题思路是先把输入的含有n个元素的数组a排序(从小到大),然后对前(n+1)/2个元素作如下的处理, s+= (a[i]+1)/2 。还请大牛指点迷津。 # include< iostream.h > # include< stdlib.h > int compare( const void *p, const void *q) { return *(int*)p > *(int*)q; } int main() { int a[101]; int n,m,s=0; cin>>n; for( int i=0; i<n; i++ ) cin>>a[i]; qsort( a,n,sizeof( int ), compare ); m= ( n+1 )/2; for( i=0; i<m; i++ ) s+= ( a[i]+1 )/2; cout<<s; return 0; } Followed by:
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