//#include <bits/stdc++.h>
#include <algorithm>
#include <iostream>
#include <fstream>
#include <vector>
#include <cmath>
#include <cstdio>
#include <set>

#define DEBUG 1
#define TIME clock() / 1.0 / CLOCKS_PER_SEC

using namespace std;

signed main()
{
    #if DEBUG
        freopen("input.txt", "r", stdin);
        freopen("output.txt" , "w", stdout);
        ios_base::sync_with_stdio(false);
    #endif

    int n;
    cin >> n;
    int *a = new int [n + 1];
    int *sum = new int [n + 1];
    int *min = new int [n + 1];
    sum[0] = 0;
    for(int i = 1; i <= n; ++i) {
        cin >> a[i];
        sum[i] = sum[i - 1] + a[i];
    }
    min[0] = 0;
    for(int i = 1; i <= n; ++i) {
        if(i == 1) {
            min[i] = sum[i];
        } else {
            min[i] = min(min[i - 1], sum[i]);
        }
    }


    return 0;
}