Cerinta completa

Given an array of integers, calculate the ratios of its elements that are , , and . Print the decimal value of each fraction on a new line with 6 places after the decimal.

Note: This challenge introduces precision problems. The test cases are scaled to six decimal places, though answers with absolute error of up to are acceptable.

Example

There are elements: two positive, two negative and one zero. Their ratios are , and . Results are printed as: 

0.400000
0.400000
0.200000

Function Description

Complete the function with the following parameter(s):

  • : an array of integers

Print
Print the ratios of positive, negative and zero values in the array. Each value should be printed on a separate line with digits after the decimal. The function should not return a value.

Input Format

The first line contains an integer, , the size of the array.
The second line contains space-separated integers that describe .

Constraints


Sample Input

STDIN           Function
-----           --------
6               arr[] size n = 6
-4 3 -9 0 4 1   arr = [-4, 3, -9, 0, 4, 1]

Sample Output

0.500000
0.333333
0.166667

Explanation

There are positive numbers, negative numbers, and zero in the array.
The proportions of occurrence are positive: , negative: and zeros: .

Limbajul de programare folosit: python3

Cod:

import sys

data = list(map(int, sys.stdin.read().strip().split()))
if not data:
    print('0.000000')
    print('0.000000')
    print('0.000000')
    raise SystemExit
n = data[0]
arr = data[1:1+n]
pos = sum(1 for x in arr if x > 0)
neg = sum(1 for x in arr if x < 0)
zero = n - pos - neg
print(f"{pos/n:.6f}")
print(f"{neg/n:.6f}")
print(f"{zero/n:.6f}")

Scor obtinut: 1.0

Submission ID: 464552212

Link challenge: https://www.hackerrank.com/challenges/plus-minus/problem

Plus Minus