top5words, C++ (gcc)

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//Title of this code

#include <iostream>
#include <string>
#include <vector>
#include <map>
#include <algorithm>

using namespace std;

bool comp(pair<string, int> a, pair<string, int> b) {
    return (a.second > b.second);
}

void printTop(vector<string>& t) {
    map<string, int> m;
    
    auto it = t.begin();
    while (it != t.end()) {
        if (m.find(*it) == m.end())
            m[*it] = 1;
        else
            ++m[*it];
        ++it;
    }
    
    
    vector<pair<string, int>> vec(m.begin(), m.end());
    sort(vec.begin(), vec.end(), comp);
    
    
    for (auto it = vec.begin(); it != vec.end(); ++it)
        cout << it->first << " - " << it->second << endl;
}

int main()
{
    vector<string> t;
    t.push_back("hello");
    t.push_back("bello");
    t.push_back("mello");
    t.push_back("jello");
    t.push_back("hello");
    t.push_back("llo");
    t.push_back("llo");
    t.push_back("ello");
    t.push_back("ello");
    t.push_back("hello");
    
    printTop(t);
    
}

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Compilation time: 1.35 sec, absolute running time: 0.14 sec, cpu time: 0 sec, memory peak: 3 Mb, absolute service time: 1.5 sec