Solution as on 06-08-2022 10:40 pm

Author: knockcat

0377. Combination Sum IV.cpp

@@ -0,0 +1,30 @@
+// 377.✅ Combination Sum IV
+
+class Solution
+{
+public:
+    vector<int> dp;
+
+    Solution()
+    {
+        dp.resize(1001);
+        fill(dp.begin(), dp.end(), -1);
+    }
+
+    int combinationSum4(vector<int> &nums, int target, int currSum = 0)
+    {
+        if (currSum > target)
+            return 0;
+        if (currSum == target)
+            return 1;
+        if (dp[currSum] != -1)
+            return dp[currSum];
+        int ways = 0;
+        for (int i = 0; i < nums.size(); i++)
+        {
+            if (currSum + nums[i] <= target)
+                ways += combinationSum4(nums, target, currSum + nums[i]);
+        }
+        return dp[currSum] = ways;
+    }
+};