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//Title of this code

#include <iostream>
#include <algorithm>
#include <map>
#include <iterator>
#include <utility>
#include <cstdlib>
#include <iomanip>

using namespace std;

int main(){
    const int sz = 10;
    multimap<int, double>mm;
    
    // mm.insert(make_pair(key, value));
    //
    mm.insert(make_pair(1, 0.50));
    mm.insert(make_pair(2, 6.12));
    mm.insert(make_pair(3, 2.00));
    mm.insert(make_pair(2, 7.21));
    mm.insert(make_pair(4, 8.30));
    mm.insert(make_pair(6, 6.12));
    mm.insert(make_pair(3, 2.00));
    mm.insert(make_pair(5, 10.01));
    mm.insert(make_pair(7, 9.00));    
            
    cout << "Is mm empty?\t"; 
    bool ans = mm.empty();
    if(ans == true)
        cout << "mm is empty";
    else
        cout << "mm is not empty";
    cout << "\n\n";
    
    int testval = 3;
    cout << "The number of " << testval << " are " << mm.count(testval) << endl;
       
    multimap<int, double>::const_iterator mSearch;
    cout << "\nKey\tValue\n\n";
    for(int i = 1; (i<mm.size()-1); i++){
        mSearch = mm.find(i);
        cout << showpoint << setprecision(3) << "[" << mSearch->first << "\t" <<  mSearch->second << "]\n";
     }

return 0;
    
    
    
};

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Compilation time: 0.83 sec, absolute running time: 0.04 sec, cpu time: 0 sec, memory peak: 3 Mb, absolute service time: 0.89 sec