为造福同学 将OJ中Python课程答案公布于此
OJ网址：https://oj.nsfz.net
章节1：输入、输出及赋值
1120 nsfz欢迎你
print('nsfz')
print('欢迎你')
1381 你的名字
name = input()
print('你好', name)
1119 A+B问题
a = int(input())
b = int(input())
print(a + b)
章节2：顺序结构
1003 混合运算
a, b=map(int, input().split())
print((a + b) * (a - b))
1001 求一个数的立方
a = int(input())
print(a ** 3)
1008 求长方形面积和周长
a, b = map(int, input().split())
print(a * b, (a + b) * 2)
1122 计算线段长度
x1, y1 = map(int, input().split())
x2, y2 = map(int, input().split())
distance = ((x1 - x2) ** 2 + (y1 - y2) ** 2) ** 0.5
print('%.3f'%distance)
254 细菌繁殖
a = int(input())
print(10 * (2 ** (a - 1)))
1007 求商和余数
a, b = map(int, input().split())
print(a // b, a % b, end=' ')
print('%.1f'%(a / b))
1133 分离数位
x = int(input())
a = x // 100
b = x // 10 % 10
c = x % 10
print(a, b, c)
255 鸡兔同笼
a = int(input())
b = int(input())
print(2*a-b//2, b//2-a)
256 分糖果
a = list(map(int, input().split()))
for i in range(5):
a[(i + 4) % 5] += a[i] // 3
a[(i + 1) % 5] += a[i] // 3
a[i] //= 3
print(a[0], a[1], a[2], a[3], a[4])
257 是0？是1？
a, b, c = map(int, input().split())
condition = a % 2 == 1 and b % 2 == 1 and c % 2 == 1
print(int(condition))
章节3：关系、逻辑运算与选择语句
1012 判断奇偶数
x = int(input())
if x % 2 == 0:
print('是')
else:
print('不是')
1014 两数比大小
a, b = map(int, input().split())
if a > b:
print(a)
else:
print(b)
1018 恐龙园买门票
h = float(input())
if h < 1.3:
print(60)
else:
print(120)
1130 心系南方灾区
from math import ceil
a,b = map(int, input().split())
print(ceil(a/b))
1013 判断闰年
a = int(input())
if a % 400 == 0 or (a % 4 == 0 and a % 100 != 0):
print('RUN!')
else:
print('NO RUN!')
267 左邻右舍
n, x = map(int, input().split())
a, b = x - 1, x + 1
if a == 0:
a = n
if b == n + 1:
b = 1
print(min(a, b), max(a, b))
1366 出租车计费
w = float(input())
if w <= 3:
print('8.0')
elif w <= 10:
print('%.1f'%(8+(w-3)*1.8))
else:
print('%.1f'%(8+7*1.8+(w-10)*2.4))
1010 三个数的大小关系
a, b, c = map(int, input().split())
if a < b < c:
print('Yes')
else:
print('No')
1370 BMI指数
a, b = map(float, input().split())
x = b / (a * a)
if x <= 18.4:
print('偏瘦')
elif x <= 23.9:
print('正常')
elif x <= 27.9:
print('过重')
else:
print('肥胖')
272 加油卡充值
n = int(input())
if n >= 5000:
print('%.2f'%(n+n*0.05))
elif n >= 3000:
print('%.2f'%(n+n*0.04))
elif n >= 1000:
print('%.2f'%(n+n*0.03))
else:
print('%.2f'%n)
266 **解方程
a, b, c = map(int, input().split())
if a == 0:
if b == 0:
if c == 0:
print('任意实数')
else:
print('无解')
else:
print('%.1f'%(-c / b))
else:
delta = b * b - 4 * a * c
if delta > 0:
print('%.1f'%((-b-delta**0.5)/2/a), end=' ')
print('%.1f'%((-b+delta**0.5)/2/a))
elif delta == 0:
print('%.1f'%(-b/2/a))
else:
print('无解')
ss13 **统计每月天数
l1 = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
l2 = [0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
a, b = map(int, input().split())
if a % 400 == 0 or a % 4 == 0 and a % 100 != 0:
print(l2[b])
else:
print(l1[b])
章节4：循环语句for
1436 输出多行******
n = int(input())
for i in range(n):
print('******')
1437 输出n个自然数
n = int(input())
for i in range(1, n + 1):
print(i, end=' ')
1020 求解1+2+3+…+n
n = int(input())
print(n * (n + 1) // 2)
1021 求1+3+5+…+n
n = int(input())
print((1 + n) * ((n - 1) // 2 + 1) // 2)
1022 求2+4+6+…+n
n = int(input())
print((2 + n) * ((n - 2) // 2 + 1) // 2)
1023 求1+1/2+1/3+…+1/n
n = int(input())
ans = 0.0
for i in range(1, n + 1):
ans += 1 / i
print('%.3f'%ans)
1025 求1*1+2*2+…+n*n
n = int(input())
ans = 0
for i in range(1, n + 1):
ans += i ** 2
print(ans)
1124 分别求奇数和偶数和
n = int(input())
ans1, ans2 = 0, 0
for i in range(n):
t = int(input())
if t % 2 == 0:
ans2 += t
else:
ans1 += t;
print(ans1)
print(ans2)
1382 求约数和
n = int(input())
ans = 0
for i in range(1, n + 1):
if n % i == 0:
ans += i
print(ans)
1026 求n!
n = int(input())
ans = 1
for i in range(1, n + 1):
ans *= i
print(ans)
1131 **判奇偶求和
n = int(input())
ans = 0
if n % 2 == 1:
for i in range(1, n + 1):
if i % 2 == 0:
ans += i
else:
for i in range(1, n + 1):
if n % i == 0:
ans += i
print(ans)
1027 **求1!+2!+…+n!
def factorial(n: int):
ans = 1;
for i in range(1, n + 1):
ans *= i
return ans
n = int(input())
ans = 0
for i in range(1, n + 1):
ans += factorial(i)
print(ans)
273 **住宿费
n = int(input())
if n % 4 == 1:
print((n // 4 - 2)* 140 + 3 * 120)
elif n % 4 == 2:
print((n // 4 - 1) * 140 + 2 * 120)
elif n % 4 == 3:
print((n // 4) * 140 + 120)
else:
print(n // 4 * 140)
章节5：循环语句while
1442 理财
n = 1.0
t = 0
while True:
n *= 1.035
t += 1
if n >= 2:
print(t)
break
1443 折纸的厚度
i = 1
while 0.00008 * (2 ** i) <= 8844.43:
i += 1
print(i)
1126 求1+1/2+1/3+…+1/n>X的n最小值
n = int(input())
s = 0
for i in range(1, 100000000):
s += 1 / i
if s > n:
print(i)
break
1132 至少多少
n = int(input())
s = 0
for i in range(1, 10000000):
s += i * 2 - 1
if s >= n:
print(i)
break
1125 角谷猜想
n = int(input())
step = 0
while n != 1:
if n % 2 == 0:
n //= 2
else:
n = n * 3 + 1
step += 1
print(step)
1444 统计整数个数
ans = 0
while True:
n = int(input())
if n == 0:
break
ans += 1
print(ans)
1367 根据AQI值判断城市的空气质量
while True:
n = int(input())
if n == -1:
exit(0)
if n <= 100:
print('优良')
else:
print('污染')
1439 辗转相除法求最大公约数
import math
a, b = map(int, input().split())
print(math.gcd(a, b))
1445 求最大公约数
from math import gcd
a, b, c = map(int, input().split())
print(gcd(gcd(a, b), c))
1445 求最大公约数
import math
a , b = map(int, input().split())
print(a * b // math.gcd(a, b))
1369 **猜数游戏
此题无法提交 不用写
章节6：列表list
1052 排序输出
l = []
while True:
s = input()
if int(s) == -1:
break
l.append(int(s))
l.sort()
for i in l:
print(i)
exit(0)
1435 评委评分
n = int(input())
l = []
for i in range(n):
l.append(int(input()))
l.sort()
print(sum(l[1:-1]) / (n - 2))
282 统计数字个数
s = input()
l = [0 for i in range(10)]
for c in s:
l[ord(c) - ord('0')] += 1
print(' '.join(map(str, l)))
1051 求平均年龄
l = []
while (n := int(input())) != 0:
l.append(n)
print('%.2f'%(sum(l) / len(l)))
1438 求平均身高
n = int(input())
l = []
for i in range(n):
l.append(float(input()))
print('%.2f'%(sum(l) / len(l)))
1050 寻找数m
l = map(int, input().split())
m = int(input())
ans = 0
for i in l:
if i == m:
ans += 1
print(ans)
章节7：自定义函数
1446 组合数
def fac(n):
s = 1
for i in range(1, n + 1):
s *= i
return s
n, m = map(int, input().split())
print(fac(n) // fac(m) // fac(n - m))
1112 绝对素数
def is_prime(n: int):
i = 2
while i ** 2 <= n:
if n % i == 0:
return False
i += 1
return True
for i in range(11, 100):
if is_prime(i) and is_prime(int(''.join(reversed(str(i))))):
print(i)
1129 求三角形周长
def dist(x1, y1, x2, y2):
return ((x1 - x2) ** 2 + (y1 - y2) ** 2) ** 0.5
x1, y1, x2, y2, x3, y3 = map(int, input().split())
ans = dist(x1, y1, x2, y2) + dist(x1, y1, x3, y3) + dist(x2, y2, x3, y3)
print('%.2f' % ans)
1118 姐妹数对
def cond(x, y):
return (x + y) % 3 == 0 or (x + y) % 7 == 0
n = int(input())
ans = 0
for i in range(1, n + 1):
for j in range(i + 1, n + 1):
if cond(i, j):
ans += 1
print(ans)
章节8：算法基础
1363 递归法求斐波拉契数列第n项的值
def f(n):
if n == 1 or n == 2:
return 1
return f(n - 1) + f(n - 2)
n = int(input())
print(f(n))
1447 递归求n!
import math
n = int(input())
print(math.factorial(n))
1448 递归法实现辗转相除算法
import math
a, b = map(int, input().split())
print(math.gcd(a, b))
1028 枚举法求水仙花数
m, n = map(int, input().split())
f = True
for i in range(m, n + 1):
if i == sum(map(lambda x: (ord(x) - ord('0')) ** 3, str(i))):
print(i, end=' ')
f = False
if f:
print('no')
1031 枚举法求完美数
def get_divisors_sum(n):
s = 0
for i in range(1, int(n ** 0.5) + 1):
if n % i == 0:
s += i
if i * i != n and i != 1:
s += n // i
return s
m, n = map(int, input().split())
for i in range(m, n + 1):
if i == get_divisors_sum(i):
print(i, end=' ')
1362 递推法求斐波拉契数列第n项的值
n = int(input())
a, b = 1, 1
if n <= 2:
print(1)
exit(0)
for i in range(n - 2):
a, b = b, a + b
print(b)
1101 汉诺塔
n = int(input())
def get_other(a, b):
l = ['A', 'B', 'C']
l.remove(a)
l.remove(b)
return l[0]
def move(n: int, src: str, dest: str):
if n == 1:
print(f'{src} To {dest}')
return
move(n - 1, src, get_other(src, dest))
print(f'{src} To {dest}')
move(n - 1, get_other(src, dest), dest)
move(n, 'A', 'C')
1440 二分查找
n = int(input())
l, r = 1, 1000
cnt = 0
while l < r and l != r - 1:
m = (l + r) // 2
cnt += 1
if n > m:
l = m
elif n < m:
r = m
else:
break
print(cnt)