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题解 | #【模板】栈#

n = int(input()) li = [] for i in range(n): inp = input() if ' ' in inp: a, b = inp.split() else: a = inp print(a, b) if a == 'push': li.append(in...

Python3

2022-04-29

0 328

题解 | #牛牛的排列数#

def mul(n): if n == 1: return 1 return n * mul(n-1) a, b = map(int, input().split()) if b > a: print(0) else: print(int(mul(a)/mul(a-b)))

Python3

2022-04-29

0 446

题解 | #牛牛的Hermite多项式#

def h(n, x): if n== 0: return 1 elif n==1: return 2 else: return 2 * x * h(n-1, x) - 2 * (n-1) * h(n-2, x) a, b = map(int, input().split()) print(h(a,...

Python3

2022-04-29

0 344

题解 | #牛牛的10类人#

n = int(input()) a = list(map(int,input().split())) for item in a: b = str(bin(item)).replace('0b', '') c, d = b.count('1'), b.count('0') if c % 2 == ...

Python3

2022-04-29

0 318

题解 | #牛牛的四叶玫瑰数#

a, b = map(int, input().split()) for i in range(a, b + 1): i = str(i) k = 0 for j in i: j = int(j) k += j * j * j * j if k == int(i): print(i, end=' '...

Python3

2022-04-29

0 319

题解 | #牛牛的替换#

li = list(input().split()) a = input() if a.count(li[1]) == 0: b = a else: for i in range(a.count(li[1])): b = a.replace(li[1], li[2]) if b.count(li[3...

Python3

2022-04-29

0 283

题解 | #牛牛的素数判断#

n = int(input()) while True: try: num = int(input()) if num in [2, 3]: print('true') continue for j in range(2, int(num ** 0.5) + 1): if num % j == 0:...

Python3

2022-04-29

0 325

题解 | #大吉大利，今晚吃鸡#

代码不难，主要需要进行数学分析，这边需要系统看一下，标记 def mul(n): if n == 1: return 2 end = 3 * mul(n - 1) + 2 return end while True: try: n = int(input()) print(mul(n)) excep...

Python3

2022-04-29

0 380

题解 | #兔子的序列#

n = int(input()) li = list(map(int, input().split())) nu = [] for i in range(n): if li[i] in [1, 2, 3]: nu.append(li[i]) continue a = li[i] ** 0.5 if...

Python3

2022-04-29

0 482

题解 | #素数回文#

t = input() flag_t = len(t) % 2 t += t[-2::-1] t = int(t) for i in range(2, int(t ** 0.5) + 1): if t % i == 0: print('noprime') break if i == int(t **...

Python3

2022-04-28

0 272