릿코드 1630. Arithmetic Subarrays 코틀린

문제:

nums범위내에서 lr의 인덱스가 같은거끼리 서브배열이고(nums.subList(l[i],r[i])),그안에서 산술수열인가뭔가 arr[n]-arr[n+1]이 같아야함

s[2]-s[1]==s[1]-s[0]
서브배열내에서 재배열가능=>정렬가능


단순시뮬돌려도될듯 범위보면

 

정답

class Solution {
    fun checkArithmeticSubarrays(nums: IntArray, l: IntArray, r: IntArray): List<Boolean> {
        val numsArithmeticList = mutableListOf<Int>()
        val resList = mutableListOf<Boolean>()

        for (index in l.indices){
            val subNumList=nums.toList().subList(l[index],r[index]+1).sorted()
            //println(subNumList)
            if (subNumList.size<1){
                continue
            }
            var minusCount=subNumList[1]-subNumList[0]
            var resBoolean=true
            for (i in 0..subNumList.size-2){
                resBoolean = (minusCount == subNumList[i+1]-subNumList[i])
                if (resBoolean==false){
                    break
                }
            }
            resList.add(resBoolean)
        }
        println(resList)
        return resList
    }
}