Create problem1.java

Author: rmkcodingclub

problem1.java

@@ -0,0 +1,40 @@
+/**
+Solved by Manikandan, Dept of CSE
+*/
+
+package javaapplication1;
+import java.util.*;
+public class Main
+{
+public static void main(String args[])
+{
+Scanner in=new Scanner(System.in);
+String s=in.nextLine();
+char a=naresh(s);
+System.out.println(a);
+}
+public static Character naresh(String e)
+{
+HashMap<Character,Integer> d=new HashMap<Character,Integer>();
+int i,j;
+Character c;
+j=e.length();
+for(i=0;i<j;i++)
+{
+c=e.charAt(i);
+if(d.containsKey(c))
+d.put(c,d.get(c)+1);
+else
+d.put(c,1);
+    }
+for(i=0;i<j;i++)
+{
+c=e.charAt(i);
+if(d.get(c)==1)
+return c;
+}
+return null;
+}
+}
+
+