01. Count Real Numbers

#include <iostream>
#include <string>
#include <sstream>
#include <map>

using namespace std;

int main() {
    string line;
    getline(cin, line);

    map<double, int> numbers;

    istringstream ss(line);

    double number;

    while (ss >> number) {
        numbers[number]++;
    }

    for(auto& n : numbers) {
        cout << n.first << " -> " << n.second << endl;
    }

    return 0;
}