Create CoinChangeII.java

Author: harshithasudhakar

Dynamic Programming/2D/Subsequences/CoinChangeII.java

@@ -0,0 +1,30 @@
+class CoinChangeII {
+    public int change(int amount, int[] coins) {
+        int n = coins.length;
+
+        int[][] dp = new int[n][amount+1];
+
+        for(int i = 0; i<n; i++){
+            dp[i][0] = 1;
+        }
+
+        for(int j = 1; j<amount+1; j++){
+            if(j != 0 && j%coins[0] == 0){
+                dp[0][j] = 1;
+            }
+        }
+
+        for(int i = 1; i<n; i++){
+            for(int j = 1; j<amount+1; j++){
+                if(j>=coins[i]){
+                    dp[i][j] = dp[i-1][j] + dp[i][j-coins[i]];
+                }
+                else{
+                    dp[i][j] = dp[i-1][j];
+                }
+            }
+        }
+
+        return dp[n-1][amount];
+    }
+}