Submission #806969

#	Time	Username	Problem	Language	Result	Execution time	Memory
806969		LucaIlie	Remittance (JOI19_remittance)	C++17	100 / 100	877 ms	28556 KiB

remittance

#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 1e6;
const long long INF = 1e17;
int a[MAX_N], b[MAX_N];

int main() {
    int n;

    cin >> n;
    for ( int i = 0; i < n; i++ )
        cin >> a[i] >> b[i];

    for ( int p = 0; p < 100; p++ ) {
        for ( int i = 0; i < n; i++ ) {
            if ( a[i] > b[i] ) {
                int x = (a[i] - b[i] + 1) / 2;
                if ( a[i] >= 2 * x ) {
                    a[(i + 1) % n] += x;
                    a[i] -= 2 * x;
                }
            }
        }
    }

    bool ans = true;
    for ( int i = 0; i < n; i++ )
        ans &= (a[i] == b[i]);
    cout << (ans ? "Yes" : "No");

    return 0;
}

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