Submission #284166

#	Time	Username	Problem	Language	Result	Execution time	Memory
284166		jainbot27	송금 (JOI19_remittance)	C++17	100 / 100	290 ms	28664 KiB

remittance

#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    int n; cin >> n; vector<int> a(n), b(n);
    for(int i=0; i < n; i++) cin >> a[i] >> b[i];
    if(*max_element(b.begin(), b.end())==0) {
        cout << (*max_element(a.begin(), a.end())==0?"Yes":"No")<< "\n"; return 0;
    }
    int g = 1;
    while(g){
        g=0;
        for(int i=0; i < n; i++){
            if(a[i] > b[i]){
                a[(i+1)%n] += (a[i] - b[i] + 1)/2;
                a[i] -= (a[i]-b[i]+1)/2*2;
                g=1;
            }
        }
    }
    g=1;
    for(int i=0; i < n; i++){
        g &= a[i] == b[i];
    }
    cout << (g?"Yes":"No") << "\n";
}

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