Here is problem solution in Python, Java, C++, C and Javascript - https://programmingoneonone.com/hackerrank-plus-minus-problem-solution.html

int positive = 0, negative = 0, zero = 0;

for (int i = 0; i < arr_count; i++) {
    if (arr[i] > 0) {
        positive++;
    } else if (arr[i] < 0) {
        negative++;
    } else {
        zero++;
    }
}
printf("%.6f\n", (float)pos / arr_count);
printf("%.6f\n", (float)neg / arr_count);
printf("%.6f\n", (float)zero / arr_count);

}

TypeScript

function plusMinus(arr: number[]): void {
    const n = arr.length;
    let [positive, negative, zero] = [0, 0, 0];

    arr.forEach(num => {
        if (num > 0) positive++;
        else if (num < 0) negative++;
        else zero++;
    });

    console.log((positive / n).toFixed(6));
    console.log((negative / n).toFixed(6));
    console.log((zero / n).toFixed(6));
}

const input = require("fs").readFileSync(0, 'utf-8').split('\n');
const n = parseInt(input[0]);
const arr = input[1].split(' ').map(Number);

plusMinus(arr);

TypeScript

def isNegative(x): return x < 0

def isPositive(x): return x > 0

def isZero(x): return x == 0

def plusMinus(arr): # Write your code here negative = float(len(list(filter(isNegative, arr))) / len(arr)) positive = float(len(list(filter(isPositive, arr))) / len(arr)) zero = float(len(list(filter(isZero, arr))) / len(arr))

                                                                print(str(positive) + '\n' + str(negative) + '\n' + str(zero))