제출 #495552

#제출 시각아이디문제언어결과실행 시간메모리
495552600MihneaRemittance (JOI19_remittance)C++17
100 / 100
236 ms16928 KiB
#include <bits/stdc++.h> using namespace std; #define int long long const int N = (int) 1e6 + 7; int n; int a[N]; int b[N]; signed main() { ios::sync_with_stdio(0); cin.tie(0); //freopen ("input", "r", stdin); cin >> n; for (int i = 0; i < n; i++) { cin >> a[i] >> b[i]; } while (true) { bool change = false; for (int i = 0; i < n; i++) { int j = (i + 1) % n; int extra = a[i] - b[i]; if (extra >= 1) { if (a[i] - (extra + 1) / 2 * 2 >= 0) { change = true; a[i] -= (extra + 1) / 2 * 2; a[j] += (extra + 1) / 2; } } } if (!change) { break; } } for (int i = 0; i < n; i++) { if (a[i] != b[i]) { cout << "No\n"; exit(0); } } cout << "Yes\n"; return 0; }
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