Codeforces Round #244 (Div. 2) A. Police Recruits

#include<bits/stdc++.h>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(false);
    int n , x , crime=0, police=0 , i , tmp;
    while(cin >> n)
    {
        crime=0;
        police=0;
        tmp=0;

        for(i=0; i<n; i++)
        {
            cin >> x;

            if(x > 0)
            {
                crime+=tmp;

                tmp=0;

                police+=x;
            }

            else
            {
                tmp++;

                if(police >= tmp)
                {
                    police = police - tmp;

                    tmp=0;
                }
            }
        }

        cout << tmp+crime << "\n";
    }

    return 0;
}