Submission #502897

#	Time	Username	Problem	Language	Result	Execution time	Memory
502897		tengiz05	Remittance (JOI19_remittance)	C++17	0 / 100	0 ms	312 KiB

remittance

#include <bits/stdc++.h>

using i64 = long long;

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    
    int n;
    std::cin >> n;
    
    std::vector<int> a(n), b(n);
    for (int i = 0; i < n; i++) {
        std::cin >> a[i] >> b[i];
    }
    
    std::function<void()> dfs = [&]() {
        if (a == b) {
            std::cout << "Yes\n";
            std::exit(0);
        }
        int p = -1;
        for (int i = 0; i < n; i++) {
            if (a[i] - b[i] > 1) {
                p = i;
                break;
            }
        }
        if (p == -1) {
            std::cout << "No\n";
            std::exit(0);
        }
        for (int i = 0; i < n; i++) {
            int j = (p + 1) % n;
            int d = a[p] - b[p];
            if (d < 0) {
                p = j;
                continue;
            }
            d /= 2;
            a[p] -= 2 * d;
            a[j] += d;
            p = j;
        }
        dfs();
    };
    
    dfs();
    
    return 0;
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 40
• Subtask 3: 0 / 45