Submission #749086

#	Time	Username	Problem	Language	Result	Execution time	Memory
749086		ljuba	Remittance (JOI19_remittance)	C++17	100 / 100	232 ms	28492 KiB

remittance

#include <bits/stdc++.h>

using namespace std;

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

    int n;
    cin >> n;

    vector<pair<int, int>> v(n);
    for(auto &z : v) cin >> z.first >> z.second;

    while(1) {
        bool promenio = false;
        for(int i = 0; i < n; ++i) {
            if(v[i].first >= 2 && v[i].first > v[i].second) {
                int uzmi = max(1, (v[i].first - v[i].second) / 2);
                v[i].first -= 2 * uzmi;
                v[(i + 1) % n].first += uzmi;

                promenio = true;
            }
        }

        if(!promenio) break;
    }

    for(int i = 0; i < n; ++i) {
        if(v[i].first != v[i].second) {
            cout << "No" << '\n';
            return 0;
        }
    }

    cout << "Yes" << '\n';
}

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