From f34ce7e5f84ccff605545a00180828316d14d212 Mon Sep 17 00:00:00 2001
From: subbu4061 <vuppalabunny1@gmail.com>
Date: Mon, 2 Mar 2026 15:29:31 -0800
Subject: [PATCH] Adding the:swq  solutions

---
 Knapsack.java | 19 +++++++++++++++++++
 Problem1.cpp  |  0
 Problem1.java |  0
 Problem2.cpp  |  0
 Problem2.java |  0
 TwoSum.java   | 18 ++++++++++++++++++
 6 files changed, 37 insertions(+)
 create mode 100644 Knapsack.java
 delete mode 100644 Problem1.cpp
 delete mode 100644 Problem1.java
 delete mode 100644 Problem2.cpp
 delete mode 100644 Problem2.java
 create mode 100644 TwoSum.java

diff --git a/Knapsack.java b/Knapsack.java
new file mode 100644
index 00000000..4d617864
--- /dev/null
+++ b/Knapsack.java
@@ -0,0 +1,19 @@
+ // TimeComplexity: O(n x W) 
+ // SpaceComplexity: O(W)
+  
+  static int knapsack(int W, int[] val, int[] wt) {
+        
+        // Initializing dp array
+        int[] dp = new int[W + 1];
+        
+        // Taking first i elements
+        for (int i = 1; i <= wt.length; i++) {
+            
+            // Starting from back, so that we also have data of
+            // previous computation of i-1 items
+            for (int j = W; j >= wt[i - 1]; j--) {
+                dp[j] = Math.max(dp[j], dp[j - wt[i - 1]] + val[i - 1]);
+            }
+        }
+        return dp[W];
+    }
diff --git a/Problem1.cpp b/Problem1.cpp
deleted file mode 100644
index e69de29b..00000000
diff --git a/Problem1.java b/Problem1.java
deleted file mode 100644
index e69de29b..00000000
diff --git a/Problem2.cpp b/Problem2.cpp
deleted file mode 100644
index e69de29b..00000000
diff --git a/Problem2.java b/Problem2.java
deleted file mode 100644
index e69de29b..00000000
diff --git a/TwoSum.java b/TwoSum.java
new file mode 100644
index 00000000..dc1ac9d5
--- /dev/null
+++ b/TwoSum.java
@@ -0,0 +1,18 @@
+// TimeComplexity: O(n)
+// SpaceComplexity: O(n)
+// Explanation: I am iterating through the array and storing the elemnet in the hashmap with its index if the compliment is not found. If the compliment is found I am returning the compliment index and the current index.
+
+class Solution {
+    public int[] twoSum(int[] nums, int target) {
+        int n = nums.length;
+        HashMap<Integer, Integer> map = new HashMap<>();
+        for(int i=0; i<n; i++) {
+            if(map.containsKey(target-nums[i])) {
+                return new int[]{map.get(target-nums[i]), i};
+            }
+            map.put(nums[i], i);
+        }
+        return new int[2];
+        
+    }
+}