[punch in - Blue Bridge Cup] day 5 --- lower() small

subject 1： Based on practice Time shift

Their thinking

Remainder , to be divisible by

Code

t = int(input())
print(t // 3600, end=':')
t = t % 3600
print(t // 60, end=':')
t = t % 60
print(t)

subject 2： Based on practice String comparison

Their thinking

if Judge
It uses str.lower() Change the string to lowercase

Code

def contrast(str1, str2):
    if len(str1) != len(str2):
        return 1
    elif str1 == str2:
        return 2
    elif str1.lower() == str2.lower():
        return 3
    elif str1.lower()!=str2.lower() and len(str1) == len(str2):
        return 4

str1 = input()
str2 = input()
print(contrast(str1, str2))

subject 3： Based on practice Decomposing prime factor

Their thinking

for loop + recursive

Code

result = {
    }
def decomposition(n):
    res = ''
    for i in range(2, n+1):
        if n % i == 0:
            res += str(i)
            n = n // i
            if n == 1:
                return res
            elif n in result.keys():
                res += '*'
                res += result[n]
                return res
            else:
                res += '*'
                res += decomposition(n)
                return res
a, b = map(int, input().split())
for i in range(a, b+1):
    result[i] = decomposition(i)
for k, v in result.items():
    s = str(k) + '=' + str(v)
    print(s)

subject 4： Based on practice Matrix multiplication

Their thinking

Matrix multiplication , List generator

Code

N, M = map(int, input().split())
rect = [list(map(int,input().split())) for i in range(N)] #  List generator 
rect_ans = [[0 for _ in range(N)] for _ in range(N)]
if M > 0:
    rect_tmp = rect
    #  Calculate matrix power 
    for _ in range(M-1):
        for i in range(N):
            for j in range(N):
                for k in range(N):
                    rect_ans[i][j] += rect_tmp[i][k] * rect[k][j]
        rect_tmp = rect_ans
else:
    for i in range(N):
        rect_ans[i][i] = 1
#  Output 
for i in range(N):
    for j in range(N):
        print(rect_ans[i][j], end=' ')
    print()