circular-array-rotation.js

function processData(rawInput) {
    var input = rawInput.split("\n").map(line => line.split(" ").map(value => parseInt(value)))
    var [ counts, buffer, ...questions ] = input;
    var [ n, k, q ] = counts;
    var result = Array.from({length: buffer.length});
    
    questions = questions.reduce((last, current) => last.concat(current))
    
    buffer.forEach((value, oldPosition) => {
        var newPosition = (k + oldPosition) % n;
        result[newPosition] = value;
    });
    
    questions.forEach(q => console.log(result[q]));
}