feat: solve two sum

Author: Real-Reason

two-sum/Real-Reason.kt

@@ -0,0 +1,16 @@
+package leetcode_study
+
+class `Real-Reason` {
+    fun twoSum(nums: IntArray, target: Int): IntArray {
+        for (startIdx in 0..< nums.size - 1) {
+            val firstNum = nums[startIdx]
+            for (endIdx in startIdx + 1..< nums.size) {
+                val secondNum = nums[endIdx]
+                if (target == firstNum + secondNum) {
+                    return intArrayOf(startIdx, endIdx)
+                }
+            }
+        }
+        throw RuntimeException("There is no solution")
+    }
+}