제출 #100352

#제출 시각아이디문제언어결과실행 시간메모리
100352MatesV13Wand (COCI19_wand)C++11
63 / 70
60 ms5880 KiB
#include <bits/stdc++.h>
using namespace std;
int n, m, a, b;
vector<int> w[100005];
bool v[100005];
void dfs(int x){
	for (vector<int>::iterator it=w[x].begin();it!=w[x].end();it++){
		if (!v[*it]){v[*it] = true; dfs(*it);}
	}
	return;
}
int main (){
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
	cin >> n >> m;
	for (int i=0;i<m;i++){
		cin >> a >> b;
		w[b].push_back(a);
	}
	dfs(1);
	for (int i=1;i<=n;i++) cout << v[i];
return 0;
}
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