• + 0 comments

    don't forget about itertools in python, it's tremendously powerful:

    from itertools import product
    
    
    if __name__ == '__main__':
        x = int(input())
        y = int(input())
        z = int(input())
        n = int(input())
        
        print(
            [
                [i, j, k] 
                for i, j, k in product(range(x + 1), range(y + 1), range(z + 1)) 
                if i + j + k != n
            ]
        )