Python: Find the number of stones in each pile
Python Programming Puzzles: Exercise-4 with Solution
We are making n stone piles! The first pile has n stones. If n is even, then all piles have an even number of stones. If n is odd, all piles have an odd number of stones. Each pile must more stones than the previous pile but as few as possible. Write a Python program to find the number of stones in each pile.
Input: 2 Output: [2, 4] Input: 10 Output: [10, 12, 14, 16, 18, 20, 22, 24, 26, 28] Input: 3 Output: [3, 5, 7] Input: 17 Output: [17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49]
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Sample Solution:
Python Code:
#License: https://bit.ly/3oLErEI
def test(n):
return [n + 2 * i for i in range(n)]
n = 2
print("Number of piles:",n)
print("Number of stones in each pile:")
print(test(n))
n = 10
print("\nNumber of piles:",n)
print("Number of stones in each pile:")
print(test(n))
n = 3
print("\nNumber of piles:",n)
print("Number of stones in each pile:")
print(test(n))
n = 17
print("\nNumber of piles:",n)
print("Number of stones in each pile:")
print(test(n))
Sample Output:
Number of piles: 2 Number of stones in each pile: [2, 4] Number of piles: 10 Number of stones in each pile: [10, 12, 14, 16, 18, 20, 22, 24, 26, 28] Number of piles: 3 Number of stones in each pile: [3, 5, 7] Number of piles: 17 Number of stones in each pile: [17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39
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Python: Tips of the Day
Find current directory and file's directory:
To get the full path to the directory a Python file is contained in, write this in that file:
import os dir_path = os.path.dirname(os.path.realpath(__file__))
(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)
To get the current working directory use
import os cwd = os.getcwd()
Documentation references for the modules, constants and functions used above:
- The os and os.path modules.
- The __file__ constant
- os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
- os.path.dirname(path) (returns "the directory name of pathname path")
- os.getcwd() (returns "a string representing the current working directory")
- os.chdir(path) ("change the current working directory to path")
Ref: https://bit.ly/3fy0R6m
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