hackerrank_PlusMinus.js

process.stdin.resume();
process.stdin.setEncoding('ascii');

var input_stdin = "";
var input_stdin_array = "";
var input_currentline = 0;

process.stdin.on('data', function (data) {
    input_stdin += data;
});

process.stdin.on('end', function () {
    input_stdin_array = input_stdin.split("\n");
    main();    
});

function readLine() {
    return input_stdin_array[input_currentline++];
}

/////////////// ignore above this line ////////////////////

function main() {
    var n = parseInt(readLine());
    arr = readLine().split(' ');
    arr = arr.map(Number);
  
    var countPlus = 0;
    var countMinus = 0;
    var countZero = 0;

    arr.forEach(function(value){
       if(value > 0) countPlus ++;
       else if(value < 0 ) countMinus ++;
       else countZero ++;
 
    });

    console.log(countPlus/n);
    console.log(countMinus/n);
    console.log(countZero/n);
}