ATaleofTwoStacks

ATaleofTwoStacks.js

function processData(input) {
    let arr = input.split('\n');
    let queue = [];
    for (let i = 1; i < arr.length; i++){
        if (Number(arr[i][0]) === 1) {
            let value = arr[i].slice(2,arr[i].length);
            queue.push(value);
        }
        if (Number(arr[i]) === 2) {
            queue.shift();
        }
        if (Number(arr[i]) === 3) {
            console.log(queue[0])
        }
    }
} 

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

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