reading input and printing output in codeforces c++ code example

Example 1: addition of array in python with input

#Python program to add all the array elements using the built-in function
lst = []
num = int(input("Enter the size of the array: "))
print("Enter array elements: ")
for n in range(num):
  numbers = int(input())
  lst.append(numbers)
print("Sum:", sum(lst))

Example 2: write a program to input a number and display its double and half values using shift operator in python

# Write a program to input a number and display its Double and Half values using SHIFT operator.

print("Hi \nThis is a basic calculator \nwhich doubles or divides into half the value entered in it")
i = int(input("pls enter your number:\n"))
print("what do you want to do? \nwarning: \nenter only the alphabet of the option and no symbols.")
print("you can enter both the options alphabet to get both the values")
print("This program gives and takes only integer value of double, half and input")
opt = input("options:- \na.double\nb.half\n")
if opt == "a":
    j = i << 1
    print("double", j)
elif opt == "b":
    k = i >> 1
    print("half:", k)
elif opt == "ab" or opt == "a b" or opt == "ba" or opt == "b a" or opt == " ab" or opt == "ab " or opt == " ab " or opt == " a b" or opt == "a b " or opt == " a b ":
    j = i << 1
    k = i >> 1
    print("number:", i)
    print("double:", j)
    print("half:", k)
else:
    print("inputs are wrong")
    exit()