Hello coders, today we are going to solve **Lucky Four Codechef Solution**. Which is a part of Codechef Solution.

### Problem

Kostya likes the number 4 much. Of course! This number has such a lot of properties, like:

- Four is the smallest composite number;
- It is also the smallest Smith number;
- The smallest non-cyclic group has four elements;
- Four is the maximal degree of the equation that can be solved in radicals;
- There is four-color theorem that states that any map can be colored in no more than four colors in such a way that no two adjacent regions are colored in the same color;
- Lagrange’s four-square theorem states that every positive integer can be written as the sum of at most four square numbers;
- Four is the maximum number of dimensions of a real division algebra;
- In bases 6 and 12, 4 is a 1-automorphic number;
- And there are a lot more cool stuff about this number!

Impressed by the power of this number, Kostya has begun to look for occurrences of four anywhere. He has a list of T integers, for each of them he wants to calculate the number of occurrences of the digit 4 in the decimal representation. He is too busy now, so please help him.

**Input**

The first line of input consists of a single integer T, denoting the number of integers in Kostya’s list.

Then, there are T lines, each of them contain a single integer from the list.

**Output**

Output T lines. Each of these lines should contain the number of occurences of the digit 4 in the respective integer from Kostya’s list.

**Constraints**

**1 ≤ T ≤ 10^5****(Subtask 1): 0 ≤ Numbers from the list ≤ 9 – 33 points.****(Subtask 2): 0 ≤ Numbers from the list ≤ 109 – 67 points.**

**Example **

**Input:**

5 447474 228 6664 40 81

**Output:**

4 1 1 0

### Lucky Four CodeChef Solution in Python

T = int(input()) for _ in range(T): n = int(input()) count = 0 while n > 0: if n % 10 == 4: count += 1 n = n // 10 print(count)

### Lucky Four CodeChef Solution in CPP

#include <iostream> using namespace std; int main() { // * Initializing variables int numberOfTestCases, number, count; // * Accepting the number of test cases cin>>numberOfTestCases; // * Executing each test case one by one while(numberOfTestCases--) { // * Accepting number cin>>number; // * Initializing the count to 0 for current test case count = 0; // * Looping while number is not equal to zero while(number != 0) { // * Incrementing count if the last digit of number is 4 if(number%10 == 4) { count++; } // * Removing the last digit from number number = number/10; } // * Displaying the value of count for current test case cout<<count<<endl; } }

**Disclaimer:** The above Problem **(Lucky Four)** is generated by **CodeChef** but the solution is provided by **Chase2learn**.This tutorial is only for **Educational** and **Learning** purpose.