IBCl9H - Online Python3 Interpreter & Debugging Tool

def count_claps(n):
    total_claps = 0
    for i in range(1, n + 1):
        num_str = str(i)
        claps = 0
        for digit in num_str:
            if digit in '369':
                claps += 1
        total_claps += claps
    return total_claps

n = int(input())

result = count_claps(n)
print(result)