Submission #96699

#	Time	Username	Problem	Language	Result	Execution time	Memory
96699		nandonathaniel	Wand (COCI19_wand)	C++14	70 / 70	56 ms	5624 KiB

wand

#include<bits/stdc++.h>
using namespace std;
vector<int> adj[100005];
bool visited[100005];

void dfs(int node){
	for(int i=0;i<adj[node].size();i++){
		if(!visited[adj[node][i]]){
			visited[adj[node][i]]=true;
			dfs(adj[node][i]);
		}
	}
}

int main(){
	ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int n,m,x,y;
    cin >> n >> m;
    for(int i=1;i<=m;i++){
    	cin >> x >> y;
    	adj[y].push_back(x);
	}
	dfs(1);
	bool stat=false;
	for(int i=1;i<=n;i++){
		if(visited[i])stat=true;
	}
	if(!stat){
		visited[1]=true;
	}
	for(int i=1;i<=n;i++){
		if(visited[i])cout << 1;
		else cout << 0;
	}
	cout << endl;
	return 0;
}

Compilation message (stderr)

wand.cpp: In function 'void dfs(int)':
wand.cpp:7:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<adj[node].size();i++){
              ~^~~~~~~~~~~~~~~~~

• Subtask 1: 70 / 70