Submission #525477

#	Time	Username	Problem	Language	Result	Execution time	Memory
525477		PiejanVDC	송금 (JOI19_remittance)	C++17	0 / 100	1 ms	204 KiB

remittance

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

signed main() {
    int n; cin>>n;
    vector<pair<int64_t,int64_t>>v(n);
    bool a = 0,b = 0;
    for(auto &z : v) {
        cin>>z.first>>z.second;
        if(z.first != 0) a = 1;
        if(z.second != 0) b = 1;
    }
    if(!a) {
        if(b) cout << "No"; else cout << "Yes";
        return 0;
    }
    for(int i = 0 ; i < n ; i++) {
        for(int ii = 0 ; ii < n-1 ; ii++) {
            int64_t d = max(0LL, (v[ii].first - v[ii].second)/2LL);
            v[ii].first -= 2LL*d;
            v[ii+1].first += d;
        }
        int d = max(0LL, (v[n-1].first - v[n-1].second)/2LL);
            v[n-1].first -= 2LL*d;
            v[0].first += d;
    }
    bool ok = 1;
    for(int i = 0 ; i < n ; i++) {
        if(v[i].first != v[i].second)
            ok = 0;
    }
    cout << (ok ? "Yes" : "No");
    return 0;
}

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