#include <bits/stdc++.h>
using namespace std;
int main() {
// your code goes here
std::vector<std::pair<double, std::pair<int, int>>> vec;
int x=100, y=10, z=20;
vec.push_back(std::make_pair((double)x,std::make_pair(y,z)));
for(int i=0;i<vec.size();i++){
std::cout<<"x: "<<vec[i].first<<"\n";
std::cout<<"y: "<<vec[i].second.first<<"\n";
std::cout<<"z: "<<vec[i].second.second<<"\n";
}
return 0;
}
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