solve: climbing stairs

Author: tolluset

climbing-stairs/tolluset.ts

@@ -0,0 +1,16 @@
+/**
+ * TC: O(n)
+ * SC: O(n)
+ * */
+function climbStairs(n: number): number {
+  const dp = new Array(n + 1).fill(0);
+
+  dp[1] = 1;
+  dp[2] = 2;
+
+  for (let i = 3; i <= n; i++) {
+    dp[i] = dp[i - 1] + dp[i - 2];
+  }
+
+  return dp[n];
+}