Submission #413723

#	Time	Username	Problem	Language	Result	Execution time	Memory
413723		rabbitsthecat	Remittance (JOI19_remittance)	C++17	0 / 100	976 ms	29560 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 < (int)v.size(); i++) {
			if (v[i] >= 2) {
				v[i] -= 2;
				
				if (i + 1 == n) {
					v[0] += 1;
					bfs(bfs);
					v[0] -= 1;
				}
				else {
					v[i + 1] += 1;
					bfs(bfs);
					v[i + 1] -= 1;
				}
				
				if (i - 1 >= 0) {
					v[i - 1] += 1;
					bfs(bfs);
					v[i - 1] -= 1;
				}
				else {
					v[n - 1] += 1;
					bfs(bfs);
					v[n - 1] -= 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
*/

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