add solution 070[js]

Author: limbowandering

solution/070.Climbing Stairs/Solution.js

@@ -0,0 +1,9 @@
+const climbStairs = function(n){
+  let arr = [];
+  arr[0] = 1;
+  arr[1] = 1;
+  for(let i = 2; i <= n; i++){
+    arr[i] = arr[i-1]+arr[i-2];
+  }
+  return arr[n];
+};