110A - Nearly Lucky Number Codeforces || Codeforces 110A - Nearly Lucky Number Solution

Problem Name: 110A Nearly Lucky Number

Judge: Codeforces

Problem link: 110A Nearly Lucky Number

Solution on GitHub: 110A Nearly Lucky Number

#include <iostream>

using namespace std;

int main()
{
    long long int n, count = 0;
    cin >> n;
    while (n != 0)
    {
        if (n % 10 == 4 || n % 10 == 7)
        {
            count++;
        }
        n = n / 10;
    }
    if (count == 4 || count == 7)
    {
        cout << "YES\n";
    }
    else
    {
        cout << "NO\n";
    }

    return 0;
}

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