Original code by fb/fariha.tasnim.9469 | Problem: https://algo.codemarshal.org/problems/556c9f097b4cec0300d4ab93

FizzBuzzExtreme.cpp

#include <iostream>
#include <string>
#include <sstream>

// Prototype
void clearBuf();

int main(){
    int lines;
    std::cin >> lines;
    clearBuf();
    std::ostringstream output;
    for(int x = 0; x < lines; x++){
        std::string line;
        std::cin >> line;
        int length = line.length();
        int sum = 0;
        int lastchar = (line[length-1] - '0');
        for(int c = 0; c < length; c++){
            sum += (line[c] - '0');
        }
        
        if( lastchar == 0 || lastchar == 5 ){
            if(sum % 3 == 0){
                output << "Case " << x+1 << ": FizzBuzz\n";
            }else{
                output << "Case " << x+1 << ": Buzz\n";
            }
        }else if(sum % 3 == 0){
            output << "Case " << x+1 << ": Fizz\n";
        }else if(sum % 3 != 0 && lastchar != 0 && lastchar != 5){
            output << "Case " << x+1 << ": Null\n";
        }
    }
    std::cout << output.str();
    return 0;
}


void clearBuf(){
    int ch;
    while((ch = std::cin.get()) != std::cin.eof() && ch != '\n');
}