Submission #797187

#	Time	Username	Problem	Language	Result	Execution time	Memory
797187		Sohsoh84	Remittance (JOI19_remittance)	C++17	100 / 100	571 ms	36500 KiB

remittance

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pll;

#define all(x)			(x).begin(),(x).end()
#define X			first
#define Y			second
#define sep			' '
#define endl			'\n'
#define debug(x)		cerr << #x << ": " <<  x << endl;

const ll MAXN = 1e6 + 10;
const ll LIM = 100;

ll A[MAXN], B[MAXN], n;

int main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	cin >> n;
	for (int i = 0; i < n; i++)
		cin >> A[i] >> B[i];

	for (int t = 0; t < LIM; t++) {
		bool flag = true;
		for (int i = 0; i < n; i++) {
			if (A[i] != B[i]) flag = false;
			if (A[i] > B[i]) {
				int r = (A[i] - B[i]) / 2;
				if (A[i] - 2 * r > max(B[i], 1ll)) r++;
				A[i] -= 2 * r;
				A[(i + 1) % n] += r;
					
			}
		}

		if (flag) return cout << "Yes" << endl, 0;
	}

	cout << "No" << endl;
	return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 40 / 40
• Subtask 3: 45 / 45