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两种方法,一种过了,还有一种没有过,奇怪了~~用了两种方法,一种过了,还有一种没有过,反复测试了N多种数据,并没有发现第二种方法的问题,有时间大家帮忙找找茬:贴码下 #include<iostream> #include<cmath> using namespace std; #define MAX 100000000 int array[MAX]; int comp(const void *a,const void *b) { return *(int *)a-*(int *)b; } int main() { long long n; while(cin>>n) { for(int i=0;i<n;i++) cin>>array[i]; qsort(array,n,sizeof(int),comp); long long total=0; int t=n-1; int i,j; i=0;j=n-1; while(t>0) { total=total+t*(array[j]-array[i]); t=t-2; i++; j--; } total=2*total; cout<<total<<endl; } return 0; } Followed by:
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