This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
int main(){
int n; cin >> n;
int a[n + 1]; for(int i = 1;i <= n;i++) cin >> a[i];
int l = 1, r = n, ans = 0;
while(l - 1 < r) {
if(a[l] == a[r]) {l++;r--;continue;}
if(a[l] > a[r]) {a[r - 1] += a[r]; r--; ans++;}
else {a[l+1] += a[l]; l++; ans++;}
}
cout << ans << '\n';
}
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