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Author: assassint2017

Shifting Letters/Shifting_Letters.cpp

@@ -0,0 +1,27 @@
+// 从后向前，反向解决问题
+
+// Runtime: 52 ms, faster than 92.07% of C++ online submissions for Shifting Letters.
+// Memory Usage: 11.7 MB, less than 75.00% of C++ online submissions for Shifting Letters.
+
+class Solution 
+{
+public:
+    string shiftingLetters(string S, vector<int>& shifts) 
+    {
+        string res = S;
+        
+        int shift = 0;
+        
+        for (int index = res.length() - 1; index >= 0; --index)
+        {
+            shift = (shift + shifts[index]) % 26;
+
+            int temp = res[index] - 'a';
+            temp = (temp + shift) % 26;
+
+            res[index] = (temp + 'a');
+        }
+        
+        return res;
+    }
+};