#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<cstring>
using namespace std;
int main(){
long long a[100001]={0};
long long s=0,t,p,k=0 ;
int i,j,n ;
cin>>n;
for(i=1;i<=n;i++){
scanf("%d",&k);
s=s+k;
a[i]=s;
}
p=s;
for(i=1;i<=n;i++){
k=s-a[i]-a[i];
if(k<0)k=-1*k;
if(k<p)p=k;
}
printf("%d",p);
} ( )
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