제출 #238272

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
238272		egekabas	송금 (JOI19_remittance)	C++14	0 / 100	5 ms	512 KiB

remittance

#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ull, ull> pull;
typedef pair<ll, ll> pii;
typedef pair<ld, ld> pld;
ll n;
ll a[1000009], b[1000009], dif[1000009];
ll check(ll x){
    for(ll i = n-1; i >= 0; --i){
        x = x*2-dif[i];
        if(x < 0)
            return -1e18;
    }
    return x;
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
    //freopen("in.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);
    
    cin >> n;
    for(ll i = 0; i < n; ++i){
        cin >> a[i] >> b[i];
        dif[i] = a[i]-b[i];
    }
    for(ll i = 0; i <= 100; ++i){
        if(check(i) == i){
            cout << "Yes\n";
            return 0;
        }
    }
    cout << "No\n";

}

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