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全部文章（共45篇）

题解 | 牛牛学数列4

def c(n): c=0 for i in range(1,n+1): c+=i return c n=int(input()) s=0 for i in range(1,n+1): s+=c(i) print(s)

2026-01-23

0 25

题解 | 最大的差

n=int(input()) a = list(map(int, input().split())) s=max(a)-min(a) print(s)

2026-01-23

0 28

题解 | 牛牛学数列2

n=int(input()) h=0 for i in range(1,n+1): h+=i**(-1) print("{:.6f}".format(h))

2026-01-23

0 30

题解 | 牛牛学数列

from re import I n=int(input()) sum=0 for i in range(1,n+1): if i%2==0: i=(-1)*i sum+=i print(sum)

2026-01-23

0 34

题解 | 素数判断

import math def is_prime(num): if num < 2: return False if num == 2: return True if num % 2 == 0: return Fals...

2026-01-23

0 33

题解 | 多组数据a+b III

while 1: a,b=map(int,input().split()) if a!=0 and b!=0: print(a+b) else: break

2026-01-23

0 28

题解 | 多组输入a+b II

t=int(input()) for i in range(t): a,b=map(int,input().split()) print(a+b)

2026-01-23

0 30

题解 | 四季

n=input() n=int(n[4:]) if 3<=n<=5: print("spring") elif 6<=n<=8: print("summer") elif 9<=n<=11: prin...

2026-01-23

0 26

题解 | 最大最小值

def comp(a,b,c): if a>b: max=a min=b else: max=b min=a if max<c: max=c if min>c: ...

2026-01-23

0 26

题解 | 牛牛是否被叫家长

a,b,c=map(int,input().split()) avg=(a+b+c)/3 if avg<60: print("YES") else: print("NO")

2026-01-23

0 30