TheLoveLetterMystery.txt

'use strict';

const fs = require('fs');

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', _ => {
    inputString = inputString.replace(/\s*$/, '')
        .split('\n')
        .map(str => str.replace(/\s*$/, ''));

    main();
});

function readLine() {
    return inputString[currentLine++];
}

function theLoveLetterMystery(s) {
    var middleLetter = Math.floor(s.length / 2);
    var codeFront = 0;
    var codeRear = 0;
    var oper = 0;

    for (var i = 0, j = s.length - 1; i < middleLetter; i++ , j--) {
        if (s.charAt(i) != s.charAt(j)) {
            codeFront = s.charCodeAt(i);
            codeRear = s.charCodeAt(j);
            oper = oper + Math.abs(codeFront - codeRear);
        }
    }
    return oper;
}

function main() {
    const ws = fs.createWriteStream(process.env.OUTPUT_PATH);

    const q = parseInt(readLine(), 10);

    for (let qItr = 0; qItr < q; qItr++) {
        const s = readLine();

        let result = theLoveLetterMystery(s);

        ws.write(result + "\n");
    }

    ws.end();
}