Решение

class Solution {
    fun findJudge(n: Int, trust: Array<IntArray>): Int {
        val trustScores = IntArray(n + 1)

        for ((a, b) in trust) {
            trustScores[a]--
            trustScores[b]++
        }

        for (i in 1..n) {
            if (trustScores[i] == n - 1) {
                return i
            }
        }

        return -1
    }
}