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unordered map Question 6

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What is the output of the program:

C++

#include <bits/stdc++.h>
using namespace std;

int main()
{
    unordered_map<int, int> m = {{1, 10}, {2, 20}};
    m.clear();
    cout << m.size() << " " << m[1];
}

0 garbage value

0 0

0 1

Error

This question is part of this quiz :

C++ Unordered Map

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GeeksforGeeks