Submission #1594769

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Source Code Expand

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <functional>
#include <stdio.h>
#include <string.h>
#include <math.h>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n;
    cin >> n;

    int64_t r = 0;
    int b = 0;
    for (int i = 0; i < n; i++) {
        int a;
        cin >> a;
        r += a / 2;
        if (b) {
            if (a % 2) r++;
            b = 0;
        } else {
            b = a % 2;
        }
    }

    cout << r << endl;

    return 0;
}

Submission Info

Judge Result