check if goal in concatenated s+s

796. Rotate String
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Given two strings s and goal, return true if and only if s can become goal after some number of shifts on s.

A shift on s consists of moving the leftmost character of s to the rightmost position.

For example, if s = "abcde", then it will be "bcdea" after one shift.
 

Example 1:

Input: s = "abcde", goal = "cdeab"
Output: true
Example 2:

Input: s = "abcde", goal = "abced"
Output: false
 

Constraints:

1 <= s.length, goal.length <= 100
s and goal consist of lowercase English letters.

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Author: Gauranshgoel123

boolean-rotate-string.java

@@ -0,0 +1,6 @@
+class Solution {
+    public boolean rotateString(String s, String goal) {
+        if(s.length()==goal.length() && (s+s).contains(goal)) return true;
+        return false;
+    }
+}