What is the output of the following C++ program?#include #include #include using namespace std; int main() { map m; m["a"]++; m["b"] += 2;…

What is the output of the following C++ program?

#include <iostream>
#include <map>
#include <string>
using namespace std;
int main() {
    map<string, int> m;
    m["a"]++;
    m["b"] += 2;
    cout << m.size() << " ";
    cout << m["c"] << " ";
    cout << m.size();
    return 0;
}