Question

How to check if a matrix rows contain numbers without repetition in Kotlin

Answer 1

fun areRowsUnique(matrix: Array<IntArray>): Boolean {
    for (row in matrix) {
        if (row.toSet().size != row.size) {
            return false // A row contains duplicate numbers
        }
    }
    return true // All rows have unique numbers
}

fun main() {
    val matrix = arrayOf(
        intArrayOf(1, 2, 3),
        intArrayOf(4, 5, 6),
        intArrayOf(7, 8, 7) // 7, 7
    )

    println("Are all rows unique? ${areRowsUnique(matrix)}") 
}



 
/*
run:
 
Are all rows unique? false
 
*/

 

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