Starie case

//also use arr.reverse
function processData(input) {

    for (let i = 0; i < input; i++) {
        
        for (let j = input-1; j > i  ; j--) {
            process.stdout.write(" ");
        }
        for (let j = 0; j <= i; j++) {
            process.stdout.write("#");
        } 
        
        process.stdout.write("\n");
    }

    
}


  
            
process.stdin.resume();
process.stdin.setEncoding("ascii");
_input = "";
process.stdin.on("data", function (input) {
    _input += input;
});

process.stdin.on("end", function () {
    processData(_input);
});