sherlock-and-array.js

'use strict';

const fs = require('fs');

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

let inputString = '';
let currentLine = 0;

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

process.stdin.on('end', function () {
    inputString = inputString.split('\n');

    main();
});

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

// Complete the balancedSums function below.
function balancedSums(arr) {
    var leftSum = 0, right = 0, i = 0;
    var sum = 0;
    while (i < arr.length) {
        sum += arr[i];
        i++;
    }
    i =0;
    while(i<arr.length){
        sum -= arr[i];
        if (sum == leftSum)
        {
            return "YES";
        }
        leftSum += arr[i];
        i++;
    }
    return "NO";
}

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

    const T = parseInt(readLine().trim(), 10);

    for (let TItr = 0; TItr < T; TItr++) {
        const n = parseInt(readLine().trim(), 10);

        const arr = readLine().replace(/\s+$/g, '').split(' ').map(arrTemp => parseInt(arrTemp, 10));

        const result = balancedSums(arr);

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

    ws.end();
}