#include <iostream>
#include <vector>
int main() {
std::vector<std::vector<int>> vec;
for( int i=0;i<5;i++)
vec.push_back(std::vector<int>(3));
for(int i=0;i<vec.size();i++){
for(int j=0;j<vec[i].size();j++){
std::cout<<&vec[i][j]<<' ';
}
std::cout<<'\n';
}
return 0;
}
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