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题解 | 小红的二叉树

n=int(input()) if n==1: print(0) else: print((3*2**(n-1)-5)%(10**9+7)) 数学问题(3*pow(2,n-1)) - 5

2025-04-03

0 38

题解 | 迷宫问题

import sys n = m = 0 index = 0 map = [] flag = [] for line in sys.stdin: a = line.split("\n")[0] if index == 0: aa = a.spli...

2025-04-03

0 30

题解 | 统计字符

import sys import string all_s = string.ascii_letters s = input() d = {'s':0,'n':0,' ':0,'o':0} for _ in s: if _ in all_s: d['s']+=1 ...

2025-03-31

0 34

题解 | 判断两个IP是否属于同一子网

import sys import ipaddress def check_ip_in_same_subnet(mask, ip1, ip2): try: # 验证子网掩码 netmask = ipaddress.IPv4Network(f"0....

2025-03-31

0 48

题解 | 求小球落地5次后所经历的路程和第5次反弹的高度

import sys n = int(input()) print(n*23.0/8.0) print(n/32.0) 数学

2025-03-31

0 29

题解 | 统计每个月兔子的总数

import sys from functools import lru_cache n = int(input()) @lru_cache def get_n(n): if n == 1 or n == 2: return 1 return get_n(n-1)+...

2025-03-31

0 28

题解 | 字符串加密

import sys import string a= input() b = input() ad = set() na = "" for _ in a: if _ not in ad: ad.add(_) na+=_ all_s = s...

2025-03-31

0 30

题解 | DNA序列

import sys s = input() n = int(input()) temp = s[0:n] count = 0 for _ in temp: if _ in {'C','G'}: count+=1 max_s = 0 max_count = count ...

2025-03-30

0 30

题解 | 查找输入整数二进制中1的个数

import sys a = int(input()) b= int(input()) ab= bin(a)[2:] bb = bin(b)[2:] for i in [ab,bb]: count = 0 for _ in i: if _ == '1': ...

2025-03-28

0 42

题解 | 查找组成一个偶数最接近的两个素数

from re import T import sys n = int(input()) s = set() def su(n): for i in range(2,n//2): if n % i == 0: return False re...

2025-03-28

0 43