Submission #514932

#	Time	Username	Problem	Language	Result	Execution time	Memory
514932		Abrar_Al_Samit	Remittance (JOI19_remittance)	C++17	100 / 100	245 ms	16080 KiB

remittance

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

void PlayGround() {
	int n;
	cin >> n;
	long long a[n], b[n];
	for(int i=0; i<n; ++i) {
		cin >> a[i] >> b[i];
	}
	int lastRem = -1;
	int now = 0;
	int v = 0;
	do {
		long long can = max(0LL, a[v]-b[v]);
		if(can&1) {
			if(can==a[v]) --can;
			else ++can;
		}
		if(can) {
			lastRem = now;
		}
		++now;
		a[v] -= can;
		v = (v+1)%n;
		a[v] += can/2;
	} while(now-lastRem<=n);

	bool ok = 1;
	for(int i=0; i<n; ++i) {
		ok &= a[i]==b[i];
	}
	cout << (ok?"Yes\n":"No\n");

	//O(Nlog(max A[i]))

	// cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
}
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	PlayGround();
	return 0;
}

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