Submission #163917

#	Time	Username	Problem	Language	Result	Execution time	Memory
163917		maruii	Remittance (JOI19_remittance)	C++14	100 / 100	332 ms	8976 KiB

remittance

#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
#define ff first
#define ss second

int N, A[1000006], X[1000006];

int main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	cin >> N;
	for (int i = 1; i <= N; ++i) {
		int x;
		cin >> x >> X[i];
		A[i] = x - X[i];
	}
	for (int i = 1; i <= N; ++i) {
		int t = i;
		while (A[t] > 1) {
			int a = A[t] / 2;
			A[t] -= a * 2;
			A[t % N + 1] += a;
			t = t % N + 1;
		}
	}
	int flag = 1, flag2 = 0, flag3 = 1;
	for (int i = 1; i <= N; ++i) {
		if (A[i]) flag3 = 0;
		if (A[i] != 1) flag = 0;
		if (X[i]) flag2 = 1;
	}
	if ((flag && flag2) || flag3) puts("Yes");
	else puts("No");
	return 0;
}

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