Day i do not know

746. Min Cost Climbing Stairs/Solution.cs

@@ -0,0 +1,17 @@
+namespace _746._Min_Cost_Climbing_Stairs;
+
+public class Solution
+{
+    public int MinCostClimbingStairs(int[] cost)
+    {
+        int prev = cost[0];
+        int cur = cost[1];
+        for(int i = 2; i < cost.Length; i++)
+        {
+            int next = cost[i] + Math.Min(prev, cur);
+            prev = cur;
+            cur = next;
+        }
+        return Math.Min(prev, cur);
+    }
+}