各位看看哪里出问题了，后五个WA，自测没问题，谢谢！！```
#include<stdio.h>
int main()
{
long long n = 0;
long long k = 0;
scanf("%d %d", &n,&k);
long long arr[10000001];
for (long long i = 0; i < n; i++)
{
scanf("%d ", &arr[i]);
}
arr[k - 1] -= arr[k - 1]*2;
long long x = 0;
for (long long j = 0; j < n; j++)
{
x = x + arr[j];
}
printf("%d", x);
return 0;
}
