Remove '100' by splitting and re-joining string until empty or equal to 100 ('yes'), or end result equals itself ('no').

testSplit100.js

function writeOutput(inputData) {
    // Start writing code here to consume input, and return result.

    // split lines of input string into an array
    const inputParts = inputData.split('\n');

    // get value of first element to serve as line count
    const lineCount = Number(inputParts[0]);

    // update this after we have a result to minimize time complexity (no nested loops)
    let inputIndex = 1;

    function split100(input) {
        return input.split('100').join('');
    }

    let testData = split100(inputParts[inputIndex]);
    let prevData = null;

    // testData is new string with 100s removed
    while (inputIndex <= lineCount) {

        // checking for 100 eliminatea one iteration
        if (testData === '100' || testData === '') {
            console.log('yes');
            prevData = null;
        }
        else if (testData === prevData) {
            console.log('no');
            prevData = null;
        }
        else {
            prevData = testData;
            testData = split100(testData);
        }

        if (prevData === null) {
            // move on to the next line if done here
            inputIndex += 1;
            testData = split100(inputParts[inputIndex] || '')
        }

    }

    return ''

}

const inputData = '' +
    '8\n' +
    '101000\n' +              // yes
    '1010001\n' +             // no
    '1001\n' +                // no
    '10010\n' +               // no
    '100110110000000\n' +     // yes
    '1001001100100100\n' +    // no
    '100110111000000000\n' +  // yes
    '101000101000' +          // yes
    '';

writeOutput(inputData);