Create 3370. Smallest Number With All Set Bits

Author: Chayandas07

3370. Smallest Number With All Set Bits

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+class Solution {
+public:
+    int smallestNumber(int n) {
+        int x = 1; 
+        while (x < n) {
+            x = (x << 1) + 1; 
+        }
+        return x;
+    }
+};