Merge

src/Test14.kt

@@ -0,0 +1,32 @@
+class Test14 {
+    class Solution {
+        fun longestCommonPrefix(strs: Array<String>): String {
+            if (strs.size == 1){
+                return strs[0]
+            }
+            var sb = strs[0]
+            for (s in strs){
+                if (sb.isEmpty()){
+                    return ""
+                }
+                if (sb.lastIndex > s.lastIndex){
+                    sb = sb.substring(s.indices)
+                }
+                for (j in s.indices){
+                    if (j > sb.lastIndex){
+                        break
+                    }
+                    if (sb[j]!=s[j]){
+                        sb = sb.substring(0..<j)
+                        break
+                    }
+                }
+            }
+            return sb
+        }
+    }
+    fun test(){
+        val s = Solution()
+        println(s.longestCommonPrefix(arrayOf("ab","a")))
+    }
+}

src/Test560.kt

@@ -0,0 +1,23 @@
+class Test560 {
+    class Solution {
+        fun subarraySum(nums: IntArray, k: Int): Int {
+            var result = 0
+            for (i in nums.indices) {
+                var sum = 0
+                for (j in i..nums.lastIndex){
+                    sum += nums[j]
+                    if (sum == k){
+                        result ++
+                    }
+                }
+            }
+            return result
+        }
+    }
+
+    fun test(): Unit {
+//        println(Solution().subarraySum(intArrayOf(1,1,1),2))
+//        println(Solution().subarraySum(intArrayOf(1,2,3),3))
+        println(Solution().subarraySum(intArrayOf(1,-1,0),0))
+    }
+}