basic kotlin.kt

private fun readLn() = readLine()!! // string line
private fun readInt() = readLn().toInt() // single int
private fun readDouble() = readLn().toDouble() // single double
private fun readLong() = readLn().toLong() // single long
private fun readStrings() = readLn().split(" ") // list of strings
private fun readInts() = readStrings().map { it.toInt() } // list of ints
private fun readDoubles() = readStrings().map { it.toDouble() } // list of doubles
private fun readLongs() = readStrings().map { it.toLong() } // list of longs

fun main(){
     var t = readInt()
     var ct = 0
     while(ct < t){
          var n = readInt()
          var ans = 0
          var it = 1
          var a = readInts()
          while(it < n){
               if(Math.abs(a[it] - a[it - 1]) % 2 == 0){
                    ans = 1
               }
               ++it
          }
          if(ans == 1)
               println("YES")
          else
               println("NO")
          ++ct
     }
}