第一题

h1,m1,h2,m2=map(int,input().split())
if m2<m1:
    m2+=60
    h2-=1
print('{0}:{1}'.format(h2-h1,m2-m1))

第二题

import math
a,b,c=map(int,input().split(','))
if b**2-4*a*c<0:
    print("无实根！")
else:
    x1 = (-b + math.sqrt(b ** 2 - 4 * a * c)) / (2 * a)
    x2 = (-b - math.sqrt(b ** 2 - 4 * a * c)) / (2 * a)
    print(f'x1={x1:.2f},x2={x2:.2f}')

第三题

x=int(input())
y=int(input())
z=int(input())
if (x+y+z)/3>=90 and x>=85 and y>=85 and z>=85:
    print("符合学习优秀学生条件")
else:
    print("不符合条件")

第四题（暂时错误）

x=int(input())
if x<=210:
    cost=x*0.5469
elif x<=400:
    cost=210*0.5469+(x-210)*0.5969
else:
    cost=210*0.5469+190*0.5969+(x-400)*0.8469
print(f'cost = {cost:.2f}')

第五题(感谢葛某人的贡献)

r,h=input().split()
r=float(r)
h=float(h)
L=(3.14159*r*r*h)/1000
if(15%L==0):
    result=15//L
else:
    result=(15//L)+1
print("%d"%(result))

第六题

x=int(input())
y=int(input())
print(x+y)
print((x+y)/2)

第七题

mon,jzx=map(int,input().split())
if mon>=7 and mon<=9:
    if jzx>=20:
        print('10')
    else:
        print('5')
else:
    if jzx>=20:
        print('20')
    else:
        print('10')

第八题

cnt=[0]*10
num_list=input().split()
for num in num_list:
    cnt[int(num)]+=1
for i in range(10):
    print(cnt[i],end=' ')

第九题

x,y=map(int,input().split())
for i in range(y+1):
    print('pow({0},{1}) = {2}'.format(x,i,x**i))

第十题

s = input()

idx = 0

while idx < len(s) and s[idx].isdigit():

    idx += 1

if idx < len(s) and s[idx] in "+-*":

    a = int(s[:idx])

    op = s[idx]

    b = int(s[idx+1:])

    if op == "+":

        print(a + b)

    elif op == "-":

        print(a - b)

    elif op == "*":

        print(a * b)

else:

    print("error")

第十一题

x=input()
s=0
for i in x:
    s+=int(i)
print(s)