#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main() {
vector<int> liczby;
//nic nie masz
liczby.push_back(9); //0
liczby.push_back(2); //1
liczby.push_back(6); //2
liczby.push_back(1); //3
liczby[0] = 15;
cout << liczby[0] << '\n';
return 0;
}
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