Submission #747606

#	Time	Username	Problem	Language	Result	Execution time	Memory
747606		stevancv	Remittance (JOI19_remittance)	C++14	100 / 100	485 ms	36448 KiB

remittance

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 1e6 + 2;
const int inf = 1e9;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n; cin >> n;
    vector<ll> a(n), b(n);
    for (int i = 0; i < n; i++) cin >> a[i] >> b[i];
    for (int zz = 0; zz < 50; zz++) {
        for (int i = 0; i < n; i++) {
            if (a[i] > b[i]) {
                ll c = (a[i] - b[i]) / 2;
                a[(i + 1) % n] += c;
                a[i] -= 2 * c;
            }
        }
    }
    int ok = 1;
    for (int i = 0; i < n; i++) ok &= (a[i] == b[i]);
    if (ok == 1) {
        cout << "Yes" << en;
        return 0;
    }
    ok = 1;
    for (int i = 0; i < n; i++) ok &= (a[i] == (b[i] + 1));
    if (ok == 0) {
        cout << "No" << en;
        return 0;
    }
    for (int i = 0; i < n; i++) if (b[i] > 0) {
        cout << "Yes" << en;
        return 0;
    }
    cout << "No" << en;
    return 0;
}

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