add 848

Author: Ashwagandha-coder

contest/src/main/java/com/github/contest/Execute.kt

@@ -1,8 +1,7 @@
 package com.github.contest
 
 
-import com.github.contest.array.maximumTripletValue
-import com.github.contest.array.maximumTripletValue
+import com.github.contest.strings.shiftingLetters
 
 import java.util.TreeMap
 
@@ -13,12 +12,7 @@ import java.util.TreeMap
 
 fun main() {
 
-    maximumTripletValue(
-        intArrayOf(
-            15, 3, 3, 18, 19, 13, 7, 5, 18, 1, 8, 5
-        )
-    ).also { println(it) }
-
+    shiftingLetters("abc", intArrayOf(3, 5, 9)).also { println(it) }
 }
 
 fun testing() {

contest/src/main/java/com/github/contest/strings/StringsLeetcode.kt

@@ -1,2 +1,35 @@
 package com.github.contest.strings
 
+/**
+ * 848. Shifting Letters
+ */
+
+fun shiftingLetters(str: String, shifts: IntArray): String {
+    val shifting = IntArray(shifts.size)
+    var sum = shifts.sum()
+    var res = ""
+
+    for (i in shifting.indices) {
+        shifting[i] = sum
+        sum -= shifts[i]
+    }
+
+    for (i in str.indices) {
+        val newCharValue = shiftLetter(str[i], shifting[i])
+        res += newCharValue
+
+    }
+
+    return res
+}
+
+private fun shiftLetter(char: Char, shift: Int): Char = when {
+    char in 'a'..'z' -> {
+        val base = 'a'.code
+        val offset = char.code - base
+        val shifted = (offset + shift) % 26
+        (base + shifted).toChar()
+    }
+    else -> char
+}
+