public static void plusMinus(List<Integer> arr) {
    int quantityPositive = 0;
    int quantityNegative = 0;
    int quantityZero = 0;
    BigDecimal resultPositive = BigDecimal.valueOf(0);
    BigDecimal resultNegative = BigDecimal.valueOf(0);
    BigDecimal resultZero = BigDecimal.valueOf(0);

    for(int i = 0; i < arr.size(); i++ ){
        if(arr.get(i) > 0){
            quantityPositive++;
            resultPositive = BigDecimal.valueOf(quantityPositive).divide(BigDecimal.valueOf(arr.size()), 6, RoundingMode.HALF_UP);
        }else if(arr.get(i) < 0){
            quantityNegative++;
            resultNegative = BigDecimal.valueOf(quantityNegative).divide(BigDecimal.valueOf(arr.size()), 6, RoundingMode.HALF_UP);
        }else{
            quantityZero++;
            resultZero = BigDecimal.valueOf(quantityZero).divide(BigDecimal.valueOf(arr.size()), 6, RoundingMode.HALF_UP);
        }


    }

        System.out.println(resultPositive);
        System.out.println(resultNegative);
        System.out.println(resultZero);
}

def plusMinus(arr): # Write your code here positive_count = 0 negative_count = 0 zero_count = 0 for num in arr: if num > 0: positive_count += 1 elif num < 0: negative_count += 1 else: zero_count += 1 positive_ratio = positive_count / n negative_ratio = negative_count / n zero_ratio = zero_count / n print(f"{positive_ratio:.6f}") print(f"{negative_ratio:.6f}") print(f"{zero_ratio:.6f}")

Typescript:

let result_posative = 0;
let result_nagative = 0;
let result_zero = 0;
for(let i=0;i<arr.length;i++){
   if(arr[i] > 0) {
   result_posative++;
   } else if(arr[i] < 0) {
   result_nagative++;
   } else {
   result_zero++;
   }
}
console.log(result_posative / arr.length);
console.log(result_nagative / arr.length);
console.log(result_zero / arr.length);

javascript:

function plusMinus(arr) { let positivo = 0; let negativo = 0; let cero = 0;

for(let i = 0; i < arr.length; i++){
    if(arr[i] > 0){
        positivo++;
    } else if(arr[i] < 0){
        negativo++;
    } else if(arr[i] == 0){
        cero++;
    }
}

console.log(positivo / arr.length);
console.log(negativo / arr.length);
console.log(cero / arr.length);

}

Video - Java - Time O(n); Space O(1) https://www.youtube.com/watch?v=YRht_UcDIK4