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哪位大哥帮我看看为什么WA啊?#include<iostream>
using namespace std;
int cmp(const void *a, const void *b)
{
return *(const __int64 *)a-*(const __int64 *)b;
}
int main()
{
int N=0,pos=0;
__int64 lens[20001],sum=0,ans=0;
scanf("%d",&N);
for(int i=0;i<N;i++)
{
scanf("%I64d",&lens[i]);
}
qsort(lens,N,sizeof(__int64),cmp);
while(N>1)
{
sum=lens[0]+lens[1];
ans+=sum;
pos=2;
while(sum>lens[pos++] && pos<N);
memcpy(lens,lens+2,(pos-2)*sizeof(__int64));
lens[pos-1]=sum;
memcpy(lens+(pos-2),lens+pos-1,(N-pos+1)*sizeof(__int64));
N--;
}
printf("%I64d",ans);
return 0;
}
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