Codility - CountDiv

시간 복잡도: O(B-A) --> 50%의 정답률

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A, B, K):
    # write your code in Python 3.6
    
    # step 1 - input A,B,K
    # already succeed
    
    # step 2 - do the for sentence
    return_value = 0
    
    for i in range(A,B+1):
        if i % K == 0:
            return_value += 1
            
    return return_value
    pass

시간 복잡도: O(1) --> 100%의 정답률

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A, B, K):
    # write your code in Python 3.6
    
    start_num = A/K
    end_num = int(B/K)
    
    if start_num%1 != 0:
        start_num = int(start_num) + 1
    else:
        start_num = int(start_num)
    
        
    return end_num - (start_num-1)
    pass