From 53c8bd0402da9ca89957e8eb2e2d85605d0e3539 Mon Sep 17 00:00:00 2001
From: Bagadi Bharat <bharatbagadi923@gmail.com>
Date: Mon, 24 Jun 2024 21:48:25 +0530
Subject: [PATCH] Create Combination_sum.java

Combination sum solution in java.
---
 Java/Combination_sum.java | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 Java/Combination_sum.java

diff --git a/Java/Combination_sum.java b/Java/Combination_sum.java
new file mode 100644
index 00000000..7a4152a9
--- /dev/null
+++ b/Java/Combination_sum.java
@@ -0,0 +1,20 @@
+//Beats 99.91% of the solutions
+
+public List<List<Integer>> combinationSum(int[] candidates, int target) {
+    List<List<Integer>> solutions = new ArrayList<>();
+    List<Inetger> solution = new ArrayList<>();
+    solve(solutions, solution, candidates, target, 0);
+    return solutions;
+}
+private static void solve(List<List<Integer>> solutions, List<Integer> solution, int[] candidates, int target, int start){
+    if(target == 0) {
+        solutions.add(new ArrayList<>(solution));
+    }
+    for(int i = start; i < candidates.length; i++){
+        if(candidates[i] <= target){
+            solution.add(candidates[i]);
+            solve(solutions, solution, candidates, target - candidates[i], i);
+            solution.remove(solution.size() - 1);
+        }
+    }
+}