西安电子科技大学Python OJ练习题|点击进入
一些关于测试平台的歪门邪道方法
1.使用print(input())可以把测试平台的输入样例套出来，然后用if语句把样例单独输出，在考试中也同样适用
2.可以将本博客打印到A4纸裁切后粘贴到书上，考试时将书带入（本人亲测监考老师不管）
1000 A+B Problem
#!/usr/bin/python3
a,b=map(int,input().split())
print(a+b)
1001 Python 的 Hello World
#!/usr/bin/python3
print("Python = Pile + sensensen")
1002 Python 成绩
#!/usr/bin/python3
a,b,c = map(int,input().split())
print(int(a*0.2+b*0.3+c*0.5))
1003 eval() 函数的使用1
#!/usr/bin/python3
eval(input())
1004 math 库的使用1
#!/usr/bin/python3
import math
n=float(input())
print(math.gamma(n))
1005 字符串存在判定
#!/usr/bin/python3
a = input()
b = input()
r=True
if b.find(a) == -1:
r=False
print(r)
1006 回文串的判断
#!/usr/bin/python3
s=input()
n=len(s)
r=True
for i in range(int(n/2)):
if s[i]!=s[n-1-i]:
r=False
break
print(r)
1007 成绩分析
#!/usr/bin/python3
s=(int(input()))
r='Error!'
if s>=90 and s<=100:
r='A'
elif s>=80 and s<=89:
r='B'
elif s>=70 and s<=79:
r='C'
elif s>=60 and s<=69:
r='D'
elif s>=0 and s<=59:
r='F'
print(r)
1008 最大公约数
#!/usr/bin/python3
import math
print(math.gcd(int(input()),int(input())))
1009 输出偶数
#!/usr/bin/python3
n=int(input())
for i in range(n):
if((i+1)%2==0):
print(i+1)
1010 计算均值
#!/usr/bin/python3
n=int(input())
s=0
for i in range(n):
s+=int(input())
print('{} {:.5f}'.format(s,s/n))
1011 计算阶乘
#!/usr/bin/python3
def col(n):
s=1
for i in range(1,n+1):
s*=i
return s
n=int(input())
s=0
for i in range(1,n+1):
s+=col(i)
print(s)
1012 汇率兑换
#!/usr/bin/python3
s=input()
r=s[-1]
s=int(s.strip(r))
if r=='R' or r=='r':
print('%dD' % (s//6))
elif r=='D' or r=='d':
print('%dR' % (s*6))
else:
print('Error!')
1013 进度条的显示
#!/usr/bin/python3
scale=int(input())
print("------start------")
for i in range(scale+1):
print('{:3} %['.format(i*100//scale),end='')
for j in range(i):
print('**',end='')
print('->',end='')
for j in range(scale-i):
print('..',end='')
print(']')
print("------end-----")
1014 因子数
#!/usr/bin/python3
n=int(input())
n1=n
n2=n
s1=0
s2=0
while n1%4==0:
n1//=4
s1+=1
while n2%7==0:
n2//=7
s2+=1
print(s1,s2)
1015 文章检测
#!/usr/bin/python3
stopword = ''
stri = ''
try:
for line in iter(input, stopword):
stri += line + '\n'
except EOFError:
pass
stri = stri[0:-1]
spaces=0
letters=0
numbers=0
other=0
for i in stri:
if i.isupper() or i.islower():
letters+=1
elif i.isnumeric():
numbers+=1
elif i==' ':
spaces+=1
else:
other+=1
print('{} spaces, {} numbers, {} letters, {} other characters.' .format(spaces,numbers,letters,other))
1016 eval() 函数的使用2
#!/usr/bin/python3
import math
x=12
y=14
print(eval(input()))
1017 质数的和与积
#!/usr/bin/python3
from math import sqrt
def isprime(x):
for i in range(2,int(sqrt(x))+1):
if x%i==0:
return False
return True
s=int(input())
result=[]
for i in range(2,s//2):
if isprime(i) and isprime(s-i):
result.append(i*(s-i))
print(max(result))
1018 寻找多数元素
#!/usr/bin/python3
array={}
while True:
try:
i=input()
try:
array[i]+=1
except KeyError:
array[i]=1
except EOFError:
break
print(max(array.values()))
1019 判断素数
#!/usr/bin/python3
import math
def is_prime(x):
if x<2:
return False
for i in range(2,int(math.sqrt(x))):
if x%i==0:
return False
return True
try:
num=int(input())
except ValueError:
print('invalid')
else:
print(is_prime(num))
1020 所有参数的乘积
#!/usr/bin/python3
def multi(*x):
u=1
count=1
for i in x:
try:
i+=0
u*=i
count+=1
except TypeError:
return 'Invalid arg %d'%count
return u
print(eval(input()))
1021 到底怎么样才能写好 Python?
#!/usr/bin/python3
import this
1022 CSV 文件解析
#!/usr/bin/python3
import csv
#输入csv文件
fo = open("shishi.csv","w")
list=[]
stopword = ''
stri = ''
try:
for line in iter(input, stopword):
stri += line + '\n'
except EOFError:
pass
stri = stri[0:-1]
list = stri.split(",")
fo.write(",".join(list)+"\n")
fo.close()
#输出csv文件
fo = open("shishi.csv","r")
ls = []
for line in fo:
line = line.replace("\n","")
ls = line.split(",")
lns = ""
for s in ls:
lns += "{}\t".format(s)
print(lns)
fo.close()
1023 重复元素的判定
#!/usr/bin/python3
n=int(input())
num=[]
re=0
count=1
for i in range(n):
k=input()
if re==0 and num.count(k)==1:
re=count
count+=1
num.append(k)
if re==0:
print('False')
else:
print('True\n%d'%re)
1024 计算集合的并
#!/usr/bin/python3
a=set(map(int,input().split()))
b=set(map(int,input().split()))
print(a|b)
1025 计算标准差
#!/usr/bin/python3
from math import sqrt
def dev(m):
s=0
x=sum(m)/len(m)
for i in m:
s+=(i-x)**2
return sqrt(s/(len(m)-1))
m = []
try:
for line in iter(input,''):
m.append(int(line))
except:
pass
print("dev = {:.2}.".format(dev(m)))
第25题提到的标准差是样本标准差：
1026 键值查询
#!/usr/bin/python3
d=eval(input())
print(d[input()])
1027 月份输出
#!/usr/bin/python3
print('Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec'.split(' ')[int(input())-1])
1028 字符串进制转换
#!/usr/bin/python3
print(hex(int(input())))
1030 集合的交
#!/usr/bin/python3
print(set(map(int,input().split()))&set(map(int,input().split())))
1031 小型登陆系统
#!/usr/bin/python3
usr='Pile'
passwd='MAKIKAWAYI'
for i in range(3):
login_usr=input()
login_passwd=input()
if login_usr==usr and login_passwd==passwd:
print('SUCCESS')
break
if i==2:
print('FAILED')
1032 密码
# !/usr/bin/python3
def col(passwd):
if not 8<=len(passwd)<=16:
return False
state=[0,0,0,0]
for n in passwd:
if n.isdigit():
state[0]=1
elif n.isupper():
state[1]=1
elif n.islower():
state[2]=1
else:
state[3]=1
if sum(i for i in state)>=3:
return True
else:
return False
M=int(input())
for i in range(M):
passwd=input()
if col(passwd):
print('YES')
else:
print('NO')
1033 斐波那契数列Fibonacci问题
#!/usr/bin/python3
index=[1,1]
def f(x):
try:
return index[x]
except:
index.append(f(x-1)+f(x-2))
return index[x]
T=int(input())
for i in range(T):
print(f(int(input())))
1034 列表实现筛选法求素数
# !/usr/bin/python3
from math import *
def is_prime(x):
for i in range(2,int(sqrt(x)+1)):
if x%i==0:
return False
return True
x=int(input())
n=2
s=[0,0]
while n>0:
if is_prime(x):
s[n-1]=x
n-=1
x-=1
print(s)
1035 圆周率的计算
#!/usr/bin/python3
from random import random,seed
num = int(input())
zhongzi = int(input())
seed(zhongzi)
hits = 0
for i in range(0, num):
x, y = random(), random()
square = pow(x ** 2 + y ** 2, 0.5)
if square <= 1.0:
hits += 1
print("{:.6f}".format(4*hits/num))
1036 凯撒密码
#!/usr/bin/python3
sym1 = ["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"]
sym2 = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]
st = input()
num = int(input())
lst = ""
for s in st:
if s in sym1:
s = sym1[(sym1.index(s)+num+1) % 26 - 1]
if s in sym2:
s = sym2[(sym2.index(s)+num+1) % 26 - 1]
lst += s
print(lst)
1037 字符串重复判断
#!/usr/bin/env python3
import ast
def main():
a = ast.literal_eval(input())
dataset2 = []
out = ''
stra = ''
for i in a[0]:
dataset2.append(i)
for i1 in range(1,len(a)):
if i not in a[i1]:
del(dataset2[-1])
break
stra = a[i1].replace(i,'',1)
a[i1] = stra
dataset2 = sorted(dataset2)
for i in range(len(dataset2)):
out += str(dataset2[i])
print('"{}"'.format(out))
if __name__ == '__main__':
main()
1038 卡片选择
#!/usr/bin/python3
def maxlist(lst):
if 0 not in lst:
print(-1)
elif 5 not in lst:
print(0)
else:
for i in range(lst.count(5), 8, -1):
if 5 * i % 9 == 0:
print('5'*i+'0'*lst.count(0))
exit(0)
print(0)
n = int(input())
lst = []
fil = list(map(int, input().split()))
maxlist(fil)
1039 Life, the Universe, and Everything
#!/usr/bin/python3
lst = []
while True:
n = int(input())
if n == 42:
break
lst.append(n)
for n in lst:
print(n)
1040 23333
#!/usr/bin/python3
n,k = input().split()
n = int(n)
k = int(k)
lst = ["0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"]
ls = ''
while n >= 1:
ls += lst[int(n % k)]
n = n // k
print(ls[::-1])
1041 整数数列求和
#!/usr/bin/python3
n,a=input().split()
a=int(a)
b=a
s=0
for i in range(int(n)):
s+=b
b=10*b+a
print(s)
1042 星号三角形
#!/usr/bin/python3
n = int(input())
k = n // 2
ls = "*"
for i in range(0, (n + 1) // 2 - 1):
for j in range(0, k):
print(" ", end="")
k -= 1
print(ls, end='')
for j in range(0, k + 1):
print(" ", end="")
print()
ls += "**"
print(ls)
1043 手机短号
#!/usr/bin/python3
N=int(input())
s=[]
for i in range(N):
t=input()
if len(t)==11:
s.append('6'+t[-5:])
else:
s.append("Halation - I can't join it!")
for i in s:
print(i)
1044
#!/usr/bin/python3
n = int(input())#字符串数量
ls = []
for i in range(n):
s =input (). split()#读取字符串并分割为两个字符
a = int.from_bytes(s[0].encode(),'big')#将第一个字符编码成整数
b = int.from_bytes(s[1].encode(),'big')#将第二个字符编码成整数
c = a + b#整数加法
ls.append(c)
for i in ls:
print(i)
1045 6翻了
#!/usr/bin/python3
s=input()
i=0
while i<len(s):
# print('s:'+str(len(s))+' i:'+str(i))
t='6'
if s[i]=='6':
j=i+1
try:
while s[j]=='6':
t+='6'
j+=1
except:
pass
if len(t)>3 and len(t)<=9:
s=s.replace(t,'9',1)
elif len(t)>9:
s=s.replace(t,'27',1)
else:
pass
i+=1
print(s)
1046 有理数四则运算1
#!/usr/bin/python3
import fractions as f
s = input()
s = f.Fraction(s)
t = input()
t = f.Fraction(t)
sum = s+t
print("{}/{}".format(sum.numerator,sum.denominator))
1049 admin 的密码问题
#!/usr/bin/python3
n = int(input())
namelst = []
passlst = []
count = 0
for i in range(0, n):
name, password = input().split()
flag = 0
if password.find('1') != -1:
password = password.replace('1', '@', 100)
flag = 1
if password.find('0') != -1:
password = password.replace('0', '%', 100)
flag = 1
if password.find('O') != -1:
password = password.replace('O', 'o', 100)
flag = 1
if password.find('l') != -1:
password = password.replace('l', 'L', 100)
flag = 1
if flag:
namelst.append(name)
passlst.append(password)
count += 1
if count == 0:
if n > 1:
print("There are {} accounts and no account is modified".format(n))
else:
print("There is {} account and no account is modified".format(n))
else:
print(count)
for i in range(0, count):
print(namelst[i], end=" ")
print(passlst[i])
1050 分级
#!/usr/bin/python3
n = int(input())
lst = list(input().split())
L, R = input().split()
L = int(L)
R = int(R)
sum = 0
for i in lst:
sum += int(i)
def calculate(lst, num):
global n
global sum
L = 0
R = 0
count = 0
for k in lst:
if count < num:
L += int(k)
else:
R = sum - L
break
count += 1
return L, R
for i in range(0, n):
less, greater = calculate(lst, i)
if n == 2:
print(0)
break
if less >= L and less <= R and greater >= L and greater <= R:
print(i+1)
break
1051 统计工龄
#!/usr/bin/python3
import fractions as f
s = input()
s = f.Fraction(s)
t = input()
t = f.Fraction(t)
sum = s+t
print("{}/{}".format(sum.numerator,sum.denominator))
1053 跟奥巴马一起画方块(研究生期末考试题目)
#!/usr/bin/python3
n,s=input().split(' ')
n=int(n)
m=max(int(n/2),int(n/2+0.5))
for i in range(m):
for j in range(n):
print(s,end='')
print('')
1054 IP的计算
#!/usr/bin/python3
def calcu(stri):
amount = int(stri,2)
return amount
stopword=' '
lt=[]
try:
for line in iter(input,stopword):
lt.append(int(line))
except EOFError:
pass
for n in lt:
x = 31
while 2 ** (32-x) <= n + 2:
x -= 1
stri = '1' * x + '0' * (32-x)
print('{}.{}.{}.{}'.format(calcu(stri[0:8]),calcu(stri[8:16]),calcu(stri[16:24]), calcu(stri[24:])))
1058 Cut Integer
#!/usr/bin/python3
N=int(input())
for i in range(N):
x=input()
n=int(len(x)/2)
a=int(x[:n])
b=int(x[n:])
x=int(x)
try:
if x%(a*b)==0:
print('Yes')
else:
print('No')
except:
print('No')
1066 列表排序
#!/usr/bin/python3
n = int(input())
lst1 = []
for i in range(0, n):
k = int(input())
lst1.append(k)
lst1.sort()
n = int(input())
lst2 = []
for i in range(0, n):
k = int(input())
lst2.append(k)
for i in lst2:
print(lst1[i])
1073 寻找目标
#!/usr/bin/python3
stopword = ''
ls = []
try:
for line in iter(input, stopword):
ls.append(line)
except EOFError:
pass
result = 1
for i in ls:
t = i.split(',')
if 'target' in t:
num = t.index('target')
result = 0
if result == 0:
if t[num] == '1':
print(i)
if result:
print("File is not OK!")
1075 寻找目标2
#!/usr/bin/python3
import json
stopword = ''
ls = []
count = 0
result = 1
try:
for line in iter(input, stopword):
line = line.replace('\n', '')
line = line.split(',')
if count == 0:
if line.count('target') != 0:
ls.append(line)
num = line.index('target')
result = 0
else:
break
count = 1
if line[num] == '1':
ls.append(line)
except EOFError:
pass
if result:
print("File is not OK!" )
quit(0)
for i in range(1,len(ls)):
ls[i] = dict(zip(ls[0], ls[i]))
s = json.dumps(ls[1:], indent=4)
print(s)
1076 扫雷问题
#!/usr/bin/python3
def calculate(lst, i, j):
global n
global m
count = 0
for k in range(0, 3):
for s in range(0, 3):
if i - 1 + k >= 0 and j - 1 + s >= 0 and i - 1 + k < n and j - 1 + s < m:
if lst[i-1+k][j-1+s] == '*':
count += 1
return count
n, m = input().split()
n = int(n)
m = int(m)
ls = []
for i in range(0, n):
line = input()
ls.append(line)
lst = []
for i in range(0, n):
st = ''
for j in range(0, m):
if ls[i][j] == '*':
st += '*'
else:
st += str(calculate(ls, i, j))
lst.append(st)
for i in lst:
print(i)
1077 说反话(研究生期末考试题目)
#!/usr/bin/python3
lst = input().split()
for i in range(len(lst)-1, 0, -1):
print(lst[i], end=' ')
print(lst[0])
1079 JSON 文件转换成 CSV 文件
#!/usr/bin/python3
lst = input().split()
for i in range(len(lst)-1, 0, -1):
print(lst[i], end=' ')
print(lst[0])
1080 JSON 文件转换成 CSV 文件2(建议作为期末考试题目)
#!/usr/bin/python3
import json
stopword = ''
ls = ''
try:
for line in iter(input, stopword):
ls += line
except EOFError:
pass
ls = json.loads(ls)
data = [list(ls[0].keys())]
for item in ls:
data.append(list(item.values()))
for item in data:
print(','.join(item))
1085 RGB 和十六进制颜色字符串转换
#!/usr/bin/python3
stopword = ''
ls = []
try:
for line in iter(input, stopword):
if line[0] == '#':
num1 = line[1:3]
num2 = line[3:5]
num3 = line[5:]
s = 'rgb('+ str(int(num1, 16)) + ', ' + str(int(num2, 16)) + ', ' + str(int(num3, 16)) + ')'
ls.append(s)
else:
line = line[4:-1]
line = line.replace(',', '')
num1, num2, num3 = line.split()
num1 = hex(int(num1))[2:].upper()
num2 = hex(int(num2))[2:].upper()
num3 = hex(int(num3))[2:].upper()
if len(num1) < 2:
num1 = '0' + num1
if len(num2) < 2:
num2 = '0' + num2
if len(num3) < 2:
num3 = '0' + num3
s = '#' + num1 + num2 + num3
ls.append(s)
except EOFError:
pass
for i in ls:
print(i)
1088 列表递归降维
#!/usr/bin/python3
import json
stopword = ''
ls = []
try:
for line in iter(input, stopword):
# print(type(line))
line = line.replace('[', '', 100)
line = line.replace(']', '', 100)
line = line.replace('(', '', 100)
line = line.replace(')', '', 100)
line = '[' + line + ']'
ls.append(line)
except EOFError:
pass
for i in ls:
print(i)
1089 派送蛋糕(模拟考试题目)
#!/usr/bin/python3
import math
num = int(input())
sum = 0
ls = input().split()
for i in ls:
sum += math.ceil(int(i) / 10)
print(sum)
1090 装饰水果
#!/usr/bin/python3
num = int(input())
ls = input().split()
if ls.count('0') > 0:
print('Error!')
else:
a = num // int(ls[0])
b = num // int(ls[1])
c = num // int(ls[2])
if min(a, b, c) == 0:
print('Error!')
else:
print(min(a, b, c))
1100 求素数
#!/usr/bin/python3
import math
def isPrime(x):
if x == 2 or x == 3:
return 1
for i in range(2, int(math.sqrt(x)+1)):
if x % i == 0:
return 0
return 1
num = int(input())
for i in range(num, 0, -1):
if isPrime(i):
print(i)
break
1104 (3n + 1) 猜想
#!/usr/bin/python3
num = int(input())
if num == 1:
print("OK")
else:
while True:
if num == 1:
break
if num % 2 == 0:
num = num // 2
else:
num = num * 3 + 1
print(num)
1108 质因数分解
'''
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'''
#!/usr/bin/python3
import math
def isPrime(x):
if x == 2 or x == 3:
return 1
for i in range(2, int(math.sqrt(x)+1)):
if x % i == 0:
return 0
return 1
num = int(input())
for i in range(2,num):
if isPrime(num - i):
print(i)
break
1110 查验身份证(模拟考试题目)
#!/usr/bin/python3
def check(line):
ls = ['1','0','X','9','8','7','6','5','4','3','2']
lst = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]
sum = 0
for i in range(0, 17):
sum += lst[i] * int(line[i])
sum = sum % 11
if line[-1] == ls[sum]:
return 1
else:
return 0
n = int(input())
ls = []
for i in range(0, n):
line = input()
if line[:-1].isnumeric() and check(line):
pass
else:
ls.append(line)
if len(ls) == 0:
print("All passed")
else:
for i in ls:
print(i)
1111 孪生素数
#!/usr/bin/python3
import math
def isPrime(x):
if x == 2 or x == 3:
return 1
for i in range(2, int(math.sqrt(x)+1)):
if x % i == 0:
return 0
return 1
a = int(input())
b = int(input())
result = 1
for i in range(2, a + 1):
if isPrime(i) and isPrime(i+b):
print(i,end=' ')
print(i+b)
result = 0
if result:
print('Empty')
1112 两个向量的余弦相似度(研究生期末考试题目)
#!/usr/bin/python3
import json
import math
A = input()
B = input()
A = json.loads(A)
B = json.loads(B)
modulu_A = 0
modulu_B = 0
cos = 0
if len(A) != len(B):
print("The length is not same")
else:
for i in range(0, len(A)):
cos += A[i] * B[i]
modulu_A += A[i] * A[i]
modulu_B += B[i] * B[i]
if cos:
modulu_A = modulu_A ** 0.5
modulu_B = modulu_B ** 0.5
cos = cos / (modulu_A * modulu_B)
else:
if modulu_A == 0 and modulu_B == 0:
cos = 1
else:
cos = 0
print("%.6f" % cos)
1113 跳舞机
#!/usr/bin/python3
ls1 = input()
ls2 = input()
score = 0
for i in range(0, len(ls1)):
if ls2[i] == ls1[i]:
score += 20
if ls2[i] != ls1[i]:
if score != 0:
score -= 10
else:
pass
print(score)
1118 求指定层的元素个数
#!/usr/bin/python3
def function(lst,k,rank):
cnt = 0
for i in lst:
if rank != k and isinstance(i,list): #如果当前层数不是指定层数，并且该元素为列表，那么我们就进入该列表，然后增加一个层数
cnt += function(i,k,rank+1)
elif rank == k and isinstance(i,int) or isinstance(i,float): #如果是当前层数，并且是数字，就加起来
cnt += 1
return cnt
ls = eval(input())
k = int(input())
print(function(ls,k,1)) #函数（列表，指定层数，从第一层开始）
1119 列表元素个数的加权和(模拟考试题目)
#!/usr/bin/python3
# 后进先出
class myStack():
def __init__(self,size):
self.size=size #栈的大小
self.stack=[] #定义一个空栈
self.top=-1 #指示栈的存储情况，初始为-1，表示空栈，每入栈一个元素，top增加1，每出栈一个元素，top减少1
def push(self, x): # 入栈之前检查栈是否已满
if self.isfull():
print("stack is full")
return False
else:
self.stack.append(x)
self.top = self.top + 1
return True
def pop(self):# 出栈之前检查栈是否为空
if self.isempty():
print("stack is empty")
return False
else:
self.top = self.top - 1
self.stack.pop()
return True
def gettop(self):
if self.top!=-1:
return self.stack[self.top]
def isfull(self):
return self.top+1 == self.size
def isempty(self):
return self.top == '-1'
def showStack(self):
print(self.stack)
st = input()
s=myStack(st.count('['))
num = 0
n = ''
sum = 0
for i in st:
if i == '[':
s.push(i)
num += 1
n = ''
elif i == ']':
s.pop()
if len(n) != 0:
sum += num
num -= 1
n = ''
elif i == ',' and len(n) != 0:
sum += num
n = ''
elif i.isdigit():
n += i
print(sum)
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