/**
 *  @author Put your name here
 *  @date Put the date here
 *  @file h07.cpp
 */
#include <string>
#include <iostream>
using namespace std;

string STUDENT = "vdinh29"; // Add your Canvas/occ-email ID

#include "h07.h"

// Place your function definitions in this file.
string zipZap(const string& str)
{
    string result;
    size_t i = 0, len = str.size(); // 1.
    if (len < 3) // 2.
    {
        return str;
    }
    while (i < len - 2) // 3.
    {
        string word = str.substr(i, 3); // 4.
        if (word.at(0) == 'z' && word.at(2) == 'p') // 5.
        {
            result += "zp";
            i += 3;
        }
        else // 6.
        {
            result += word.at(0);
            i++;
        }
    }
    result += str.substr(i); // 7.
    return result;
}


int countCode(const string& str)
{
    int result = 0;
    for (size_t i = 0, len = str.size(); len > 3 && i < len - 3; ++i)
    {
        string code = str.substr(i, 4); // 1.
        string co = code.substr(0, 2); // 2.
        string e = code.substr(3);
        if (co == "co" && e == "e") // 3.
        {
            result ++;
        }
    }
    return result;
}
string everyNth(const string& str, int n)
{
    string result;
    for (size_t i = 0, len = str.size(); i < len; i = i + n)
    {
        result += str.at(i);

        if (n < 1)
        {
             return result;
        }
    }
    return result;
}
bool prefixAgain(const string& str, int n)
{
    bool result = false;
    string prefix = str.substr(0, n);
    for (size_t i = 1, len = str.size(); i < len; ++i)
    {
        string word = str.substr(i,n);
        if (word == prefix)
        {
            return true;
        }
    }
    return result;
}




////////////////// STUDENT TESTING /////////////
int run()
{
    cout << "Student testing" << endl;
    return 0;
}