Submission #147231

#	Time	Username	Problem	Language	Result	Execution time	Memory
147231		osaaateiasavtnl	Remittance (JOI19_remittance)	C++14	100 / 100	502 ms	43656 KiB

remittance

#include<bits/stdc++.h>
using namespace std;
#define int long long 
#define ii pair <int, int>
#define app push_back
#define all(a) a.begin(), a.end()
#define bp __builtin_popcount
#define ll long long
#define mp make_pair
#define f first
#define s second
const int N = 1e6 + 7;
int a[N], b[N], d[N];
signed main() {
    #ifdef HOME
    freopen("input.txt", "r", stdin);
    #else
    ios_base::sync_with_stdio(0); cin.tie(0);
    #endif
    int n; cin >> n;
    queue <int> q;
    for (int i = 0; i < n; ++i) { 
        cin >> a[i] >> b[i]; 
        d[i] = a[i] - b[i]; 
        if (d[i] > 1) q.push(i); 
    }
    while (q.size()) {
        int i = q.front(); q.pop();
        if (d[i] > 1) {
            int j = (i + 1) % n;
            d[j] += d[i] >> 1;
            if (d[j] > 1) q.push(j);
            d[i] &= 1;   
        }
    }
    bool c = 1;
    for (int i = 0; i < n; ++i) c &= d[i] == 1;
    if (c) {
        for (int i = 0; i < n; ++i) {
            if (b[i]) {
                cout << "Yes\n"; exit(0);
            }   
        }   
    }
    for (int i = 0; i < n; ++i) {
        if (d[i]) { cout << "No\n"; exit(0); }
    }
    cout << "Yes\n";
}

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