제출 #347493

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
347493		tengiz05	열대 식물원 (Tropical Garden) (IOI11_garden)	C++17	0 / 100	3 ms	3820 KiB

garden

#include "garden.h"
#include "gardenlib.h"
//~ #include "grader.cpp"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int N_ = 150005;
int ans, n, m, target;
vector<int> edges[N_];
vector<bool> used;
int d;
void dfs(int u){
	if(d < 0)return;
	used[u] = true;
	if(d == 0){
		if(u == target){
			ans++;
		}d--;
		return;
	}d--;
	for(auto v : edges[u]){
		if(d < 0)return;
		if(used[v])continue;
		dfs(v);
		if(d == 0 && u == target){
			ans++;d--;return;
		}
	}d--;
}
void count_routes(int N, int M, int P, int R[][2], int Q, int G[]){
	target = P;
	n = N, m = M;
	for(int i=0;i<m;i++){
		edges[R[i][0]].pb(R[i][1]);
		edges[R[i][1]].pb(R[i][0]);
	}
	for(int i=0;i<Q;i++){
		ans=0;
		for(int j=0;j<n;j++){
			used.assign(n,0);
			d = G[i];
			dfs(j);
		}answer(ans);
	}return;
}

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