Added NAICHEF solution

CHEFRUN.java

@@ -0,0 +1,33 @@
+import java.util.*;
+import java.lang.*;
+import java.io.*;
+
+/* Name of the class has to be "Main" only if the class is public. */
+class Codechef
+{
+	public static void main (String[] args) throws java.lang.Exception
+	{
+		Scanner in = new Scanner(System.in);
+        int length = in.nextInt();
+        Double x1,x2,x3,v1,v2 ;
+        Double d1,d2;
+        for (int i = 0; i < length  ; i++) {
+            x1 = in.nextDouble();
+            x2 = in.nextDouble();
+            x3 = in.nextDouble();
+            v1 = in.nextDouble();
+            v2 = in.nextDouble();
+
+            x1 = x3 -x1;
+            x2 = x2-x3;
+
+            if((x1/v1) == (x2/v2)){
+                System.out.println("Draw");
+            }else if((x1/v1) < (x2/v2)){
+                System.out.println("Chef");
+            }else
+                System.out.println("Kefa");
+
+        }
+	}
+}

FLOW004.java

@@ -0,0 +1,24 @@
+import java.util.*;
+import java.lang.*;
+import java.io.*;
+
+/* Name of the class has to be "Main" only if the class is public. */
+class Codechef
+{
+	public static void main (String[] args) throws java.lang.Exception
+	{
+
+		Scanner in = new Scanner(System.in);
+        int testCases = in.nextInt();
+        int i = 0;
+        int sum = 0;
+        while (i < testCases) {
+
+            String number  = in.next();
+            String[] arr = number.split("");
+            sum = Integer.parseInt(arr[0]) + Integer.parseInt(arr[arr.length-1]);
+            System.out.println(sum);
+            i++;
+        }
+	}
+}

FLOW018.java

@@ -0,0 +1,28 @@
+/* package codechef; // don't place package name! */
+
+import java.util.*;
+import java.lang.*;
+import java.io.*;
+
+/* Name of the class has to be "Main" only if the class is public. */
+class Codechef
+{
+	public static void main (String[] args) throws java.lang.Exception
+	{
+
+		Scanner in = new Scanner(System.in);
+        int testCases = in.nextInt();
+        int i = 0;
+        int sum = 1;
+        int num = 0;
+        while (i < testCases) {
+            num = in.nextInt();
+            for (int j = 1; j <= num; j++) {
+                sum=sum*j;
+            }
+            System.out.println(sum);
+            sum = 1;
+           i++;
+        }
+	}
+}

NAICHEF.java

@@ -0,0 +1,34 @@
+import java.util.*;
+import java.lang.*;
+import java.io.*;
+
+/* Name of the class has to be "Main" only if the class is public.
+*  @author Rana M. Suleman
+ */
+class Codechef
+{
+	public static void main (String[] args) throws java.lang.Exception
+	{
+
+	Scanner in = new Scanner(System.in);
+
+        int length = in.nextInt();
+        do{
+            int[] arr = new int[in.nextInt()];
+            double a = in.nextDouble();
+            double b = in.nextDouble();
+            for (int i = 0; i < arr.length ; i++) {
+             arr[i] = in.nextInt();
+            }
+
+            double a_faces=0,b_faces = 0;
+            for (int value: arr) {
+                if(value == a) a_faces++;
+                if(value == b) b_faces++;
+            }
+            System.out.println((a_faces/ ((double) arr.length))*(b_faces/ ((double) arr.length)));
+            length--;
+        }while(length != 0);
+
+	}
+}