mars exploration hacker rank solution javascript

Please refer this link for problem statement click here

Javascript program for mars exploration hackerrank solution

function marsExploration(message) {

    let sos = "SOS", count = 0;

    for (let i = 0; i < message.length; i++) {

        if (message.charAt(i) != sos.charAt(i % 3)) {
            count++;

        }

    }

    

    return count;

}



Time Complexity : O(n)

Space Complexity : O(1)