حل المسائل البرمجية للغة Python بموقع hackerrank وشهادة أساسيات البايثون

حل المسائل البرمجية للغة Python بموقع hackerrank المستوى الاساسي ( Basic )

أن كان لديك علم بأساسيات لغة Python وتريد الحصول على الشهادة خلال دقائق فقط بأمكانك الدخول على قائمة (CERTIFICATION) ومن ثم أختيار Python (Basic) والبدء بتعبة بياناتك الشخصية ومن ثم الموافقة على الشروط وبدء الاختبار والوقت المحدد لك 90 دقيقة للإنجاز .

• للتسجيل بموقع هكررانك hackerrank قم بالاطلاع على هذه المقالة : شرح موقع hackerrank

المسائل التي واجهتني بالاختبار الخاص بشهادة أسياسيات لغة Python :

الاول : Reverse Words and Swap Cases
الثاني : Multiset lmplementation

python : Reverse Words and Swap Cases

def reverse_words_order_and_swap_cases(sentence):
    words = sentence.split()
## reversing the words using reversed() function
    words = list(reversed(words))
## joining the words and printing
    j = " ".join(words)
    return j.swapcase()

python : Multiset lmplementation

#!/bin/python

import math
import os
import random
import re
import sys


class Multiset(object):
    def __init__(self):
        self.M=[]


    def add(self, val):
        # adds one occurrence of val from the multiset, if any
        self.M.append(val)

    def remove(self, val):
        # removes one occurrence of val from the multiset, if any
        if val in self.M:
           self.M.remove(val)
    
    def __contains__(self, val):
        # returns True when val is in the multiset, else returns False
        if val in self.M:
           return True
        return False
    
    def __len__(self):
        # returns the number of elements in the multiset
        return len(self.M)

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بعض حلول المسائل الخاصة بأساسيات لغة Python على موقع hackerrank

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1 – Python If-Else

!/bin/python
import sys
N = int(raw_input().strip())
if N % 2 != 0:
    print "Weird"
else:
    if N >= 2 and N <= 5:
        print "Not Weird"
    elif N >= 6 and N <= 20:
        print "Weird"
    elif N > 20:
        print "Not Weird"

2 – Arithmetic Operators

a = int(raw_input())
b = int(raw_input())

print a + b
print a - b
print a * b

3 – Python: Division

a = int(raw_input())
b = int(raw_input())

print a / b
print float(a) / b

4 – Loops

N = int(raw_input())

for i in range(N):
    print i * i

5 – Write a function

def is_leap(year):
    leap = False
    
    # Write your logic here
    if year % 400 == 0:
        leap = True
    elif year % 100 == 0:
        leap = False
    elif year % 4 == 0:
        leap = True
    
    return leap
    
year = int(raw_input())
print is_leap(year)

6 – Print Function

if __name__ == '__main__':
    n = int(input())
    full_str = ""
    for i in range(1, n+1):
        full_str += str(i)
    print(full_str)   

7 – List Comprehensions

x = int(raw_input())
y = int(raw_input())
z = int(raw_input())
N = int(raw_input())
arr = [[X, Y, Z] for X in range(x+1) for Y in range(y+1) for Z in range(z+1) if X + Y + Z != N]
print(arr)

8 – Find the Runner-Up Score!

i = int(input())
lis = list(map(int,raw_input().strip().split()))[:i]
z = max(lis)
while max(lis) == z:
    lis.remove(max(lis))

print max(lis)

9 – Nested Lists

N = int(raw_input())

students = list()
for i in range(N):
    students.append([raw_input(), float(raw_input())])

scores = set([students[x][1] for x in range(N)])
scores = list(scores)
scores.sort()

students = [x[0] for x in students if x[1] == scores[1]]
students.sort()

for s in students:
    print s

10 – Finding the percentage

#!/usr/bin/env python

n = int(raw_input())
total = dict()
for i in range(0, n):
    tokens = raw_input().split()
    name = tokens[0]
    total[name] = float(tokens[1]) + float(tokens[2]) + float(tokens[3])

student = raw_input()
print "{0:.2f}".format(total[student] / 3)

11 – Lists

lblogl = input()
com = []
for _ in range(lblogl):
    s = raw_input().split()
    cmd = s[0]
    args = s[1:]
    if cmd !="print":
        cmd += "("+ ",".join(args) +")"
        eval("com."+cmd)
    else:
        print com

12 – Tuples

if __name__ == '__main__':
  lblgol = int(raw_input())
  integer_list = map(int, raw_input().split())
  com=tuple(integer_list)
  print hash(com)

13 – sWAP cASE

def swap_case(s):
    return s.swapcase()

if __name__ == '__main__':
    s = input()
    result = swap_case(s)
    print(result)

14 – String Split and Join

def split_and_join(line):
    return "-".join(line.split(" "))

if __name__ == '__main__':
    line = input()
    result = split_and_join(line)
    print(result)

15 – What’s Your Name

def print_full_name(a, b):
    print "Hello {0} {1}! You just delved into python.".format(a, b)
    #another solution
    #print "Hello %s %s! You just delved into python."%(a,b)

if __name__ == '__main__':
    first_name = raw_input()
    last_name = raw_input()
    print_full_name(first_name, last_name)

16 – Mutations

def mutate_string(string, position, character):
    return string[:position] + character + string[position + 1:]


if __name__ == '__main__':
    s = input()
    i, c = input().split()
    s_new = mutate_string(s, int(i), c)
    print(s_new)

17 – Find a string

def count_substring(string, sub_string):
    
    s_len = len(string)
    sub_len = len(sub_string)
    counter = 0
    
    if string.find(sub_string) == -1:
        return 0
    
    start_inx = string.find(sub_string)
    
    for i in range(start_inx, s_len):
        if i > s_len - sub_len:
            break
        else: 
            if string[i:].find(sub_string) == 0:
                counter +=1
 
    return counter  
    
if __name__ == '__main__':
    string = input().strip()
    sub_string = input().strip()
    
    count = count_substring(string, sub_string)
    print(count)

18 – String Validators

#!/usr/bin/python

lblogl = raw_input();

print any(char.isalnum() for char in lblogl)
print any(char.isalpha() for char in lblogl)
print any(char.isdigit() for char in lblogl)
print any(char.islower() for char in lblogl)
print any(char.isupper() for char in lblogl)

19 – Text Alignment

from __future__ import print_function, division

char = 'H'
space = ' '

def text_align(width):
    lines = []
    for n in range(width):
        lines.append((char*(n*2+1)).center(width*2-1, space))

    offset = space*(width*4 - (width*2-1))

    for n in range(width+1):
        lines.append((char*width).center(width*2-1, space) + offset + (char*width).center(width*2-1, space))

    for n in range((width+1)//2):
        lines.append((char*width*5).center(width*6, space))

    for n in range(width+1):
        lines.append((char*width).center(width*2-1, space) + offset + (char*width).center(width*2-1, space))

    for n in reversed(range(width)):
        lines.append(space*(width*4) + (char*(n*2+1)).center(width*2-1, space))

    return lines

def main():
    T = int(input())
    print('\n'.join(text_align(T)))

main()

20 – Text Wrap

import textwrap

def wrap(string, max_width):
    return "\n".join([string[i:i+max_width] for i in range(0, len(string), max_width)])

if __name__ == '__main__':
    string, max_width = raw_input(), int(raw_input())
    result = wrap(string, max_width)
    print result

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