I'm getting an error regarding .class file. Please help me out in this

help
,
1

My issue

Warning: File ./Codechef.class does not contain class Codechef
Error: Could not find or load main class Codechef
Caused by: java.lang.NoClassDefFoundError: codechef/Codechef (wrong name: Codechef)

My code

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
	{
		// your code goes here
		Scanner sc=new Scanner(System.in);
		int N=sc.nextInt();
		int S[]=new int[N];
		int T[]=new int[N];
		String Leader[]=new String[N];
		int Lead[]=new int[N];
		for(int i=0;i<N;i++)
		{
		    S[i]=sc.nextInt();
		    T[i]=sc.nextInt();
		}
		for(int i=0;i<N;i++)
		{
		    if(S[i]>T[i])
		    {
		        Leader[i]="player1";
		        Lead[i]=S[i]-T[i];
		    }
		    else
		    {
		      Leader[i]="player2";
		      Lead[i]=T[i]-S[i];
		    }
		}
		int p1c=0,p2c=0;
		for(int i=0;i<N;i++)
		{
		    if(Leader[i]=="player1")
		       p1c+=Lead[i];
		    else
		       p2c+=Lead[i];
		}
		if(p1c>p2c)
		{
		    System.out.println("1 "+p1c);
		}
		else
		  System.out.println("2 "+p2c);
	}
}

Problem Link: CodeChef: Practical coding for everyone