01. Count Real Numbers

#include <iostream>
#include <string>
#include <utility>
#include<map>
#include <sstream>
using namespace std;

int main()
{
    string str;
    getline(cin, str);
    istringstream istr(str);

    map<double, size_t> doubles;
    double d;
    while (istr >> d)
    {
        doubles[d]++;
    }
        for (pair<double, size_t> cur : doubles)
            cout << cur.first << " -> " << cur.second << endl;

            return 0;
}