lab1.3 c++

#include <iostream>

using namespace std;

int main()
{
    int NumM, NumK, Num;
    bool IsCorrect;
    Num = 4;
    NumK = 0;
    cout << "Given an integer m > 10. Find the largest integer k for which 4^k <
             m.\n";
    cout << "Enter integer (>10): ";
    do
    {
        IsCorrect = false;
        cin >> NumM;
        if ((cin.fail()) or (NumM < 10))
        {
            IsCorrect = true;
            cout << "Incorrect value. Enter the number: ";
        }
        cin.clear();
        while (cin.get() != '\n');
    } while (IsCorrect);

    while (Num < NumM)
    {
        Num = Num * 4;
        NumK = NumK + 1;
    }
    cout << NumK;

    return 0;
}