Submission #330584

#	Time	Username	Problem	Language	Result	Execution time	Memory
330584		MilosMilutinovic	슈퍼트리 잇기 (IOI20_supertrees)	C++14	Compilation error	0 ms	0 KiB

supertrees

#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
int construct(vector<vector<int>> a){
    int n=(int)a[0].size();
    for(int i=0;i<n;i++)for(int j=0;j<n;j++)if(a[i][j]==3)return 0;
    vector<int> E[n];
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            if(a[i][j]==1)E[i].pb(j),E[j].pb(i);
        }
    }
    vector<vector<int>> ans(n,vector<int>(n,0));
    for(int i=0;i<n;i++){
        for(int c:E[i])ans[i][j]=1;
    }
    build(ans);
}
/*int main(){
    int n;
    scanf("%i",&n);
    vector<vector<int>> a(n,vector<int>(n));
    for(int i=0;i<n;i++)for(int j=0;j<n;j++)scanf("%i",&a[i][j]);
    int ans=construct(a);
    return 0;
}*/

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:16:31: error: 'j' was not declared in this scope
   16 |         for(int c:E[i])ans[i][j]=1;
      |                               ^
supertrees.cpp:16:17: warning: unused variable 'c' [-Wunused-variable]
   16 |         for(int c:E[i])ans[i][j]=1;
      |                 ^
supertrees.cpp:19:1: warning: control reaches end of non-void function [-Wreturn-type]
   19 | }
      | ^