Submission #100984

#	Time	Username	Problem	Language	Result	Execution time	Memory
100984		KLPP	Wand (COCI19_wand)	C++14	70 / 70	92 ms	25848 KiB

wand

#include<bits/stdc++.h>

using namespace std;
typedef long long int lld;
vector<int> nei[1000000];
bool visited[1000000];
void DFS(int node){
  //ut<<node<<" ";
  for(int i=0;i<nei[node].size();i++){
    if(!visited[nei[node][i]]){
      visited[nei[node][i]]=true;
      DFS(nei[node][i]);
    }
  }
}
int main(){
  int n,m;
  scanf("%d %d",&n,&m);
 
  for(int i=0;i<m;i++){
    int x,y;
    scanf("%d %d",&x,&y);
    x--;y--;
    nei[y].push_back(x);
  }
  DFS(0);
  if(nei[0].size()==0)visited[0]=true;
  for(int i=0;i<n;i++){
    cout<<visited[i];
  }cout<<endl;
  return 0;
}

Compilation message (stderr)

wand.cpp: In function 'void DFS(int)':
wand.cpp:9:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<nei[node].size();i++){
               ~^~~~~~~~~~~~~~~~~
wand.cpp: In function 'int main()':
wand.cpp:18:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&n,&m);
   ~~~~~^~~~~~~~~~~~~~~
wand.cpp:22:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&x,&y);
     ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 70 / 70