Kotlin Heroes 5: ICPC Round B. Polycarp and the Language of Gods

• Time : O(n)
• Space : O(1)

fun solve(s: String) : Int {
    val n = s.length
    var res = 0
    var i = 0
    while(i < n) {
        if(s[i] == 'w') {
            res++;
        } else if(s[i] == 'v' && (i + 1 != n && s[i + 1] == 'v')) {
            res++;
            i += 1;
        }
        i++;
    }
    return res;
}

fun main(args: Array<String>) {
    val tc = readLine()!!
    for(i in 1 .. tc.toInt()) {
        val s = readLine()!!
        println(solve(s))
    }
}