Submission #1296973

#	Time	Username	Problem	Language	Result	Execution time	Memory
1296973		nataliaa	World Map (IOI25_worldmap)	C++20	Compilation error	0 ms	0 KiB

worldmap

#include<bits/stdc++.h>
using namespace std;
vector<int> ans;
vector<int> v[41];
void rec(int u, int w) {
    ans.push_back(w);
    for(int i = 0; i < v[w].size(); i++) {
        if(v[w][i]!=u){
            rec(w, v[w][i]);
            ans.push_back(v[w][i]);
        }
    }
}
vector<vector<int>> create_map(int N, int M,
vector<int> A, vector<int> B){
    if(m==0) {
        vector<vector<int>> v1(1, vector<int>(1,1));
        return v1;
    }
    for(int i = 0; i<=40; i++) v[i].clear();
    for(int i = 0; i < M; i++) {
        v[A[i]].push_back(B[i]);
        v[B[i]].push_back(A[i]);
    }
    rec(0, 1);
    int n = ans.size();
     vector<vector<int>> ans1(n, vector<int>(n));
     for(int i = 0; i < ans.size(); i++) {
         for(int j = 0; j < ans.size(); j++){
             ans1[i][j] = ans[j];
         }
     }
     return ans1;
}

Compilation message (stderr)

worldmap.cpp: In function 'std::vector<std::vector<int> > create_map(int, int, std::vector<int>, std::vector<int>)':
worldmap.cpp:16:8: error: 'm' was not declared in this scope
   16 |     if(m==0) {
      |        ^