SherlockAndAnagrams.js

'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++];
}

// Complete the sherlockAndAnagrams function below.
function sherlockAndAnagrams(s) {

  let count = 0;

    // Size of our sliding window
    for (let i = 1; i < s.length; i++) {
        let found = {};

        // Starting index of our sliding window
        for (let j = 0; j + i <= s.length; j++) {
            let substr = s.substr(j, i);
            substr = substr.split('').sort().join('');
            if (found[substr]) {
                count += found[substr];
                found[substr]++;
            } else {
                found[substr] = 1;
            }
        }
    }

    return count;

}

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 = sherlockAndAnagrams(s);

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

    ws.end();
}