#include <bits/stdc++.h>
using namespace std;
int main() {
int n = 10;
map<int, vector<int> > mp;
for(int i = 0 ; i < n ;i++)
mp[i].push_back(i+10);
for(auto it : mp){
cout<<it.first<<" ";
for(int i = 0 ; i < it.second.size() ; i++){
cout<<it.second[i]<<" ";
}
cout<<endl;
}
return 0;
}
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