제출 #413707

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
413707		rabbitsthecat	송금 (JOI19_remittance)	C++17	0 / 100	760 ms	29564 KiB

remittance

#include "bits/stdc++.h"
using namespace std;
 
#define ffor(n) for(int i = 0; i < n; i++)
#define fffor(n) for(int j = 0; j < n; j++)
#define uwu ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize("Ofast")
 
const int INF = 1e9 + 7;
const long long INF2 = 1e17;

int main(void) {
	uwu
	
	int n; cin >> n;
	vector <int> left(n), right(n);
	ffor(n) cin >> left[i] >> right[i];
	
	map <vector <int>, bool> reachable;
	vector <int> v = left;
	
	auto bfs = [&] (auto&& bfs) -> void {
		if (reachable[v]) return;
		reachable[v] = true;
		for(int i = 0; i < n; i++) {
			if (v[i] >= 2) {
				v[i] -= 2;
				
				v[(i + 1) % n] += 1;
				bfs(bfs);
				v[(i + 1) % n] -= 1;
				
				v[(i + n - 1) % n] += 1;
				bfs(bfs);
				v[(i + n - 1) % n] -= 1;
				
				v[i] += 2;
			}
		}
	};
	
	bfs(bfs);
	if (reachable[right]) cout << "Yes\n";
	else cout << "No\n";
}

/*
C:\Users\kenne\OneDrive\Desktop\competitive_programming\main.cpp
*/

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