Submission #145985

#	Time	Username	Problem	Language	Result	Execution time	Memory
145985		fedoseevtimofey	Remittance (JOI19_remittance)	C++14	100 / 100	379 ms	36600 KiB

remittance

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;

#define int long long

signed main() {
    ios_base::sync_with_stdio(false); cin.tie(0); cout.setf(ios::fixed); cout.precision(20);
    #ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #endif
    int n;
    cin >> n;
    vector <int> a(n), b(n);
    for (int i = 0; i < n; ++i) cin >> a[i] >> b[i];
    while (true) {
    	bool fl = false;
    	for (int i = 0; i < n; ++i) {
    		if (a[i] > b[i] + 1) {
    			int x = a[i] - b[i];
    			x -= x % 2;
    			a[i] -= x;
    			a[(i + 1) % n] += x / 2;
    			fl = true;
    		}
    	}
    	if (!fl) {
    		for (int i = 0; i < n; ++i) {
    			if (a[i] == b[i] + 1 && a[i] >= 2) {
    				a[i] -= 2;
    				a[(i + 1) % n] += 1;
    				fl = true;
    			}
    		}
    	}
    	if (!fl) break;
    }
    if (a == b) cout << "Yes\n";
    else cout << "No\n";
}

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