def isPowerOfTwo(n: int) -> bool:
   
    return n > 0 and (n & (n - 1)) == 0

# أمثلة لاختبار 
test_cases = [1, 16, 3]
results = {n: isPowerOfTwo(n) for n in test_cases}


for n, result in results.items():
    print(f"Input: {n}, Output: {result}")