From 9e2d34b5910726216eb0be53276258308e635c2b Mon Sep 17 00:00:00 2001
From: abhikbob <kai.abhik@gmail.com>
Date: Mon, 7 Oct 2019 12:37:33 +0530
Subject: [PATCH 1/2] Added firstDuplicate, firstNotRepeatingCharacter and
 rotateImage

---
 src/com/codesignal/firstDuplicate.java             | 10 ++++++++++
 src/com/codesignal/firstNotRepeatingCharacter.java | 12 ++++++++++++
 src/com/codesignal/rotateImage.java                | 11 +++++++++++
 3 files changed, 33 insertions(+)
 create mode 100644 src/com/codesignal/firstDuplicate.java
 create mode 100644 src/com/codesignal/firstNotRepeatingCharacter.java
 create mode 100644 src/com/codesignal/rotateImage.java

diff --git a/src/com/codesignal/firstDuplicate.java b/src/com/codesignal/firstDuplicate.java
new file mode 100644
index 00000000..96289440
--- /dev/null
+++ b/src/com/codesignal/firstDuplicate.java
@@ -0,0 +1,10 @@
+int firstDuplicate(int[] a) {
+    HashSet<Integer> hs = new HashSet<Integer>();
+    for(int i:a){
+        if(!hs.contains(i))hs.add(i);
+        else return i;
+    }
+    
+return -1;
+}
+
diff --git a/src/com/codesignal/firstNotRepeatingCharacter.java b/src/com/codesignal/firstNotRepeatingCharacter.java
new file mode 100644
index 00000000..07cde826
--- /dev/null
+++ b/src/com/codesignal/firstNotRepeatingCharacter.java
@@ -0,0 +1,12 @@
+char firstNotRepeatingCharacter(String s) {
+
+    for(int i=0; i<s.length(); i++){
+        char a = s.charAt(i);
+		if(s.indexOf(a) == s.lastIndexOf(a)){
+			return s.charAt(i);
+		}
+	}
+    
+    
+return '_';}
+
diff --git a/src/com/codesignal/rotateImage.java b/src/com/codesignal/rotateImage.java
new file mode 100644
index 00000000..4f0ef520
--- /dev/null
+++ b/src/com/codesignal/rotateImage.java
@@ -0,0 +1,11 @@
+int[][] rotateImage(int[][] a) {
+    
+    int l=a.length,i,j;
+    int[][] ans = new int[l][l];
+    
+    for(i=0;i<l;i++)
+    for(j=l-1;j>=0;j--){
+        ans[i][l-j-1] = a[j][i];}
+
+return ans;}
+

From 237eba7189cab0ff9ee176cf3e99110b25a5489e Mon Sep 17 00:00:00 2001
From: abhikbob <kai.abhik@gmail.com>
Date: Mon, 7 Oct 2019 18:15:36 +0530
Subject: [PATCH 2/2] Made codes into working programs

---
 src/com/codesignal/FirstDuplicate.java        | 21 ++++++++++++++
 .../FirstNotRepeatingCharacter.java           | 24 +++++++++++++++
 src/com/codesignal/RotateImage.java           | 29 +++++++++++++++++++
 src/com/codesignal/firstDuplicate.java        | 10 -------
 .../firstNotRepeatingCharacter.java           | 12 --------
 src/com/codesignal/rotateImage.java           | 11 -------
 6 files changed, 74 insertions(+), 33 deletions(-)
 create mode 100644 src/com/codesignal/FirstDuplicate.java
 create mode 100644 src/com/codesignal/FirstNotRepeatingCharacter.java
 create mode 100644 src/com/codesignal/RotateImage.java
 delete mode 100644 src/com/codesignal/firstDuplicate.java
 delete mode 100644 src/com/codesignal/firstNotRepeatingCharacter.java
 delete mode 100644 src/com/codesignal/rotateImage.java

diff --git a/src/com/codesignal/FirstDuplicate.java b/src/com/codesignal/FirstDuplicate.java
new file mode 100644
index 00000000..b9429e61
--- /dev/null
+++ b/src/com/codesignal/FirstDuplicate.java
@@ -0,0 +1,21 @@
+import java.util.*;
+
+public class sol{
+
+static int FirstDuplicate(int[] a) {
+    HashSet<Integer> hs = new HashSet<Integer>();
+    for(int i:a){
+        if(!hs.contains(i))hs.add(i);
+        else return i;
+    }
+    
+return -1;
+}
+
+public static void main(String args[]){
+    int[] a={2, 1, 3, 5, 3, 2};
+    System.out.print("First duplicate: "+FirstDuplicate(a));
+    
+}
+
+}
diff --git a/src/com/codesignal/FirstNotRepeatingCharacter.java b/src/com/codesignal/FirstNotRepeatingCharacter.java
new file mode 100644
index 00000000..e204bd9f
--- /dev/null
+++ b/src/com/codesignal/FirstNotRepeatingCharacter.java
@@ -0,0 +1,24 @@
+import java.util.*;
+
+public class sol{
+
+static char FirstNotRepeatingCharacter(String s) {
+
+    for(int i=0; i<s.length(); i++){
+        char a = s.charAt(i);
+		if(s.indexOf(a) == s.lastIndexOf(a)){
+			return s.charAt(i);
+		}
+	}
+    
+    
+return '_';}
+
+
+public static void main(String args[]){
+    String a = "abacabad";
+    System.out.print("First not repeating character: "+FirstNotRepeatingCharacter(a));
+    
+}
+
+}
diff --git a/src/com/codesignal/RotateImage.java b/src/com/codesignal/RotateImage.java
new file mode 100644
index 00000000..0d525b4a
--- /dev/null
+++ b/src/com/codesignal/RotateImage.java
@@ -0,0 +1,29 @@
+import java.util.*;
+
+public class sol{
+
+static int[][] RotateImage(int[][] a) {
+    
+    int l=a.length,i,j;
+    int[][] ans = new int[l][l];
+    
+    for(i=0;i<l;i++)
+    for(j=l-1;j>=0;j--){
+        ans[i][l-j-1] = a[j][i];}
+
+return ans;}
+
+
+
+public static void main(String args[]){
+    int[][] a= {{1,2,3},{4,5,6},{7,8,9}};
+    int[][] ans=RotateImage(a);
+    for(int i=0;i<a.length;i++){
+        for(int j=0;j<a[i].length;j++)System.out.print(ans[i][j]+" ");
+        System.out.println();
+    }
+    
+    
+}
+
+}
diff --git a/src/com/codesignal/firstDuplicate.java b/src/com/codesignal/firstDuplicate.java
deleted file mode 100644
index 96289440..00000000
--- a/src/com/codesignal/firstDuplicate.java
+++ /dev/null
@@ -1,10 +0,0 @@
-int firstDuplicate(int[] a) {
-    HashSet<Integer> hs = new HashSet<Integer>();
-    for(int i:a){
-        if(!hs.contains(i))hs.add(i);
-        else return i;
-    }
-    
-return -1;
-}
-
diff --git a/src/com/codesignal/firstNotRepeatingCharacter.java b/src/com/codesignal/firstNotRepeatingCharacter.java
deleted file mode 100644
index 07cde826..00000000
--- a/src/com/codesignal/firstNotRepeatingCharacter.java
+++ /dev/null
@@ -1,12 +0,0 @@
-char firstNotRepeatingCharacter(String s) {
-
-    for(int i=0; i<s.length(); i++){
-        char a = s.charAt(i);
-		if(s.indexOf(a) == s.lastIndexOf(a)){
-			return s.charAt(i);
-		}
-	}
-    
-    
-return '_';}
-
diff --git a/src/com/codesignal/rotateImage.java b/src/com/codesignal/rotateImage.java
deleted file mode 100644
index 4f0ef520..00000000
--- a/src/com/codesignal/rotateImage.java
+++ /dev/null
@@ -1,11 +0,0 @@
-int[][] rotateImage(int[][] a) {
-    
-    int l=a.length,i,j;
-    int[][] ans = new int[l][l];
-    
-    for(i=0;i<l;i++)
-    for(j=l-1;j>=0;j--){
-        ans[i][l-j-1] = a[j][i];}
-
-return ans;}
-