Add files via upload

Author: vishnuthumpudi

climbing-stairs.java

@@ -0,0 +1,24 @@
+class Solution {
+    public int climbStairs(int n) {
+        int a=2,b=1,temp=0;
+        if(n==1)
+        {
+            return b;
+        }
+        if(n==2)
+        {
+            return a;
+        }
+        for(int i=3;i<=n;i++)
+        {
+            temp=a+b;
+            b=a;
+            a=temp;
+            if(i==n)
+            {
+                break;
+            }
+        }
+        return temp;
+    }
+}