In this Hacker Rank Plus Minus problem solution, Given an array of integers, calculate the ratios of its elements that are positive, negative, and zero. 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 10^-4 are acceptable.
Example
arr = [1,1,0,-1,-1]
There are n = 5 elements, two positive, two negative and one zero. Their ratios are 2/5=0.400000, 2/5=0.400000 and 1/5=0.200000. Results are printed as:
0.400000
0.400000
0.200000
Function Description
Complete the plusMinus function in the editor below.
plusMinus has the following parameter(s):
- int arr[n]: an array of integers
Print the ratios of positive, negative and zero values in the array. Each value should be printed on a separate line with 6 digits after the decimal. The function should not return a value.
Input Format
The first line contains an integer, n, the size of the array.
The second line contains n space-separated integers that describe .
Constraints
- 0 < n <= 100
- -100 <= arr[i] <= 100
Output Format
Print the following 3 lines, each to 6 decimals:
- proportion of positive values
- proportion of negative values
- proportion of zeros
Plus Minus Hacker Rank Problem Solution JavaScript:
function plusMinus(arr) {
let [negCount, zerCount, posCount] = [0, 0, 0];
for (const num of arr) {
if (num < 0) ++negCount;
if (num == 0) ++zerCount;
if (num > 0) ++posCount;
}
console.log((posCount / arr.length).toFixed(6));
console.log((negCount / arr.length).toFixed(6));
console.log((zerCount / arr.length).toFixed(6));
}
Plus Minus Hacker Rank Problem Solution Python:
def plusMinus(arr):
n = len(arr)
cnt = arr.count(0)
if cnt == 0:
arr.append(0)
idx = sorted(arr).index(0)
neg = idx / n
zeros = cnt / n
pos = 1 - neg - zeros
print(pos)
print(neg)
print(zeros)