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(){
ios_base::sync_with_stdio(false);
cin.tie(0);
int n;
cin >> n;
vector <int> v(n);
for(int i = 0; i < n; i++) cin >> v[i];
int sol = 0, lo = 0, hi = n-1;
while(lo < hi){
if(v[lo] == v[hi]){
lo++, hi--;
continue;
}
else if(v[lo] < v[hi]){
v[lo + 1] += v[lo];
lo++;
}
else{
v[hi - 1] += v[hi];
hi--;
}
sol++;
}
cout << sol;
}
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