Submission #1500266

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Source Code Expand

#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
#define repb(i, a, b) for(int i = a; i >= b; i--)
#define all(a) a.begin(), a.end()
#define o(a) cout << a << endl
#define int long long
#define fi first
#define se second
using namespace std;
typedef pair<int, int> P;

signed main(){
    int n;
    cin >> n;
    vector<int> a(n);
    int ans = 0;
    rep(i, 0, n){
        cin >> a[i];
    }
    a. push_back(0);
    int now = 0;
    rep(i, 0, n + 1){
        if(a[i] == 0){
            ans += now / 2;
            now = 0;
        }else{
            now += a[i];
        }
    }
    cout << ans << endl;
}

Submission Info

Judge Result