#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N=2e5+10;
int n,i,x,y,ans,a[N];
signed main()
{
	scanf("%lld",&n);ans=(1ll<<60);
	for(i=1;i<=n;i++)
		scanf("%lld",&a[i]),y+=a[i];
	for(i=1;i<n;i++)
	{
		x+=a[i];y-=a[i];
		ans=min(ans,abs(x-y));
	}
	printf("%lld\n",ans);
	return 0;
}