Submission #4114215

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Source Code Expand

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n;
	cin >> n;
	vector<long long> a(n);
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	long long ans = 0;
	for (int i = 1; i < n; i++) {
		long long x = a[i - 1] + a[i];
		ans += x / 2;
		if (a[i] != 0) a[i] = x % 2;
	}
	cout << ans << endl;
	return 0;
}

Submission Info

Judge Result