Submission #232429

#	Time	Username	Problem	Language	Result	Execution time	Memory
232429		limabeans	Remittance (JOI19_remittance)	C++17	100 / 100	302 ms	28920 KiB

remittance

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

template<typename T>
void out(T x) { cout << x << endl; exit(0); }
#define watch(x) cout << (#x) << " is " << (x) << endl




typedef long long ll;
const ll mod = 1e9+7;
const int maxn = 10;









int n;
vector<ll> a, b;

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);  cout.tie(0);

    cin>>n;
    a.resize(n);
    b.resize(n);
    
    for (int i=0; i<n; i++) {
	cin>>a[i]>>b[i];
    }
    bool az = true;
    bool bz = true;
    for (int i=0; i<n; i++) {
	if (a[i]>0) az=false;
	if (b[i]>0) bz=false;
    }
    if (bz) {
	if (az) out("Yes");
	out("No");
    }


    while (1) {
	bool edit = false;
	for (int i=0; i<n; i++) {
	    if (a[i]>b[i]) {
		ll push = (a[i]-b[i]+1)/2;
		a[i] -= push*2;
		a[(i+1)%n] += push;
		edit = true;
	    }
	}

	if (!edit) break;
    }

    if (a == b) out("Yes");
    out("No");

    

    return 0;
}

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