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全部文章（共71篇）

题解 | 构造A+B

x,y = map(int,input().split()) print("YES" if x-y>=1 else "NO")

2025-03-11

0 65

题解 | 自守数

l = [1, 2, 2, 2, 2, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5...

2025-03-11

0 56

题解 | 小红的二叉树

n = int(input()) if n == 1: print(0) else: pow1 = pow(2,n-1,1000000007) print((3*pow1-5)%1000000007)

2025-03-10

1 62

题解 | 公共子串计算

a = input() b = input() na,nb = len(a),len(b) dp = [[0]*(nb+1) for _ in range(na+1)] for i in range(1,na+1): for j in range(1,nb+1): if a[...

2025-03-06

0 28

题解 | 统计大写字母个数

a = input() cnt = 0 for i in a: if i.isupper(): cnt += 1 print(cnt)

2025-03-05

0 33

题解 | 构造C的歪

a,b = map(int,input().split()) print(2*b-a)

2025-03-05

0 36

题解 | 单词倒排

l = [] for i in range(128): if i not in range(65,65+27) and i not in range(97,97+27): l.append(chr(i)) a = input() l2 = [] for i in a: ...

2025-03-05

0 33

题解 | 简单密码

a = input() def f(x): l = [] for i in x: if i in list("abc"): l.append("2") elif i in list(&qu...

2025-03-05

0 31

题解 | 密码验证合格程序

from sys import stdin input1 = stdin.read().split() def f(x): if len(x) < 8: return False c1,c2,c3,c4 = False,False,False,False ...

2025-03-05

1 29

题解 | 购物单

from collections import defaultdict n,m = map(int,input().split()) n//=10 value = [] weight = [] l0 = [] dict1 = defaultdict(list) for i in range(m): ...

2025-03-05

0 31