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貌似数组不需要用__int64类型。。。也不需要排序。。。。。。#include<iostream> #include<cmath> using namespace std; const int MaxSize=10010; int cow[MaxSize];//牛的编号,无重复、未排序 int main() { int i,j; int n; cin>>n; for(i=0;i<n;i++) scanf("%d",&cow[i]); //////////////////////// __int64 sum=0; for(i=0;i<n;i++){ for(j=i+1;j<n;j++){ sum+=(2*abs(cow[j]-cow[i])); } } printf("%I64d\n",sum); return 0; } Followed by:
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