#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
 
using namespace std;
 
int main() {    
    string characters = "aasa asdfs dfh f ukjyhkh k wse f sdf sdfsdf";    
 
    // initialize with 256 entries, one for each character:
    vector<int> counts(256);
 
    for (string::size_type i = 0; i <= characters.length(); i++) {
        // for each occurrence of a character, increase the value in the vector:
        int int_char = (int)characters[i];
        counts[int_char]++;  
    }
    vector<int>::iterator most_frequent =
        std::max_element(counts.begin(), counts.end());
 
    // getting the character (index within the container, "key"):
    cout << (char)(most_frequent - counts.begin()) << ": ";
 
    // the number of occurrences ("value"):
    cout << (*most_frequent) << endl;
 
    return 0;
}

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