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题解 | 添加逗号

import sys a = list(input()) k = len(a) #倒序每隔3个遍历 for i in range(k,0,-3): if i <k: a.insert(i,',') print(''.join(a))

2026-03-30

1 15

题解 | 扫雷

import sys n,m = map(int,input().split()) a = [[0]*(m+2) for _ in range(n+2)] #外圈套0 for i in range(1,n+1): # a[i] =list(map(str,input())) a[...

2026-03-30

1 16

题解 | 牛牛数数

import sys n = int(input()) for i in range(1,n+1): if "4" in str(i) or i % 4 == 0: continue print(i)

2025-10-10

0 55

题解 | 数位之和

import sys n = abs(int(input())) c = 0 for i in str(n): c += int(i) print(c)

2025-10-10

1 41

题解 | 牛牛学数列4

import sys n = int(input()) res = 0 for i in range(1,n+1): res += i*(i+1)//2 print(res)

2025-10-10

1 55

题解 | 最大的差

import sys n = int(input()) a = list(map(int,input().split())) max ,min = a[0],a[0] #遍历整个数组，找出最大值和最小值，然后作差 for i in range(n): if a[i] > max : ...

2025-10-09

1 51

题解 | 最大的差

import sys n = int(input()) a = list(map(int,input().split())) max ,min = a[0],a[0] #遍历整个数组，找出最大值和最小值，然后作差 for i in range(n): if a[i] > max : ...

2025-10-09

0 55

题解 | 最大的差

import sys n = int(input()) a = list(map(int,input().split())) max ,min = a[0],a[0] #遍历整个数组，找出最大值和最小值，然后作差 for i in range(n): if a[i] > max : ...

2025-10-09

1 47

题解 | 牛牛学数列2

import sys n = int(input()) res = 0 for i in range(n): res += 1/(i+1) print(f"{res:.6f}")

2025-10-09

0 43

题解 | 牛牛学数列

import sys n = int(input()) res = 0 for i in range(n): res += (-1)**i*(i+1) print(res)

2025-10-09

0 49