Day5

Author: mahtab04

Day5/q18.py

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+# cook your dish here
+# problem link ->"https://www.codechef.com/problems/LUCKFOUR"
+t = int(input())
+for i in range(t):
+    a = input()
+    print(a.count('4'))

Day5/q19.py

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+# Take two lists, say for example these two:
+
+#   a = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89]
+#   b = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
+# and write a program that returns a list that contains only the elements that are common between the
+#  lists (without duplicates). Make sure your program works on two lists of different sizes.
+
+a = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 13, 13, 13, 13, 12]
+b = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 13, 13, 13]
+c = []
+for n in b:
+    if n in b:
+        if n not in c:
+            c.append(n)
+print(c)

Day5/q20.py

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+# Ask the user for a string and print out whether this string is 
+# a palindrome or not. (A palindrome is a string that reads the 
+# same forwards and backwards.)
+mystring = input()
+for i in range(len(mystring) // 2):
+    if mystring[i] != mystring[- 1 - i]:
+        print('Not Palindrome')
+        break
+else:
+    print('Palindrome')
+
+
+string = "Hello"
+i = 0
+for ch in range(len(string)):
+    if (string[i] != string[-1-i]):
+        print('Not Palindrome')
+        break    
+    else:
+        print("Pelindrom")   
+        break
+
+
+def reverse(word):
+	x = ''
+	for i in range(len(word)):
+		x += word[len(word)-1-i]
+		return x
+
+word = input('give me a word:\n')
+x = reverse(word)
+if x == word:
+	print('This is a Palindrome')
+else:
+	print('This is NOT a Palindrome')

Day5/q21.py

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+# Let’s say I give you a list saved in a variable: 
+# a = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100]. Write one line 
+# of Python that takes this list a and makes a new list that has only the even elements of this list in it.
+
+a = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100]
+
+c = [num for num in a if num%2==0]
+print(c)