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题解 | 牛牛学数列6

import sys n = int(input()) f = [0,1,1] for i in range(3,n+1): f.append(f[i-1]+2*f[i-2]+f[i-3]) print(f[n-1])

2025-06-26

0 5

题解 | 数位之和

import sys n = list(map(int, input())) print(sum(n)) 字符串列表,变成数字列表

2025-06-26

0 4

题解 | 比大小

import sys a, b = map(int, input().split()) print("<" if a<b else "=" if a == b else ">")

2025-06-26

0 6

题解 | 小乐乐求和

from re import S import sys n = int(input()) print(n*(n+1)//2)

2025-06-25

0 7

题解 | 牛牛学立体

import sys a = list(map(int, input().split())) s = 2*(a[0]*a[1]+a[1]*a[2]+a[0]*a[2]) v = a[0]*a[1]*a[2] print(s,v,sep='\n')

2025-06-25

0 6

题解 | 绕距

import sys import math x1, y1= map(int, input().split()) x2, y2= map(int, input().split()) de = pow((pow(x1-x2, 2) + pow(y1-y2, 2)), 0.5) dm = abs(x1 ...

2025-06-24

0 7

题解 | 绕距

import sys import math x1, y1= map(int, input().split()) x2, y2= map(int, input().split()) de = pow((pow(x1-x2, 2) + pow(y1-y2, 2)), 0.5) dm = abs(x1 ...

2025-06-24

0 8

题解 | 平方根

import sys import math a = int(input()) print(int(pow(a,0.5)))

2025-06-24

0 7

题解 | 整数的十位

import sys a = int(input()) print((abs(a)//10)%10)

2025-06-24

0 7

题解 | 复读机

import sys print(input()) print(input()) print("%.1f"%float(input())) print(input()) print(input())

2025-06-24

0 7