diff --git a/790_Domino_and_Tromino_Tiling b/790_Domino_and_Tromino_Tiling
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+LeetCode 790: Domino and Tromino Tiling
+C++
+===================================================
+
+class Solution {
+public:
+    int mod=1000000007;
+    int numTilings(int n) {
+        if(n==1 || n==2) return n;
+
+        long dp[1002]={1,1,2};
+        for(int i=3;i<=n;i++)
+        {
+            dp[i]=(2*dp[i-1]+dp[i-3])%mod;
+        }
+        return dp[n];
+    }
+};