Piyush and Magical park

Plz find my error. I can’t find it
import java.util.*;
public class Main {

public static void magical_park(char a[][100],int m,int n, int k, int s){

boolean success = true;
for(int i=0;i<m;i++){
	for(int j=0;j<n;j++){
		char ch = a[i][j];

		if(s<k){
			success = false;
			break;
		}
		if(ch=='*'){
			s+=5;
		}else if(ch=='.'){
			s-=2;
		}else{
			break;
		}
		if(j!=n-1){
			s--;
		}
	}

}
if(success){
System.out.println("Yes");
}
else{
System.out.println("No");
}

}
public static void main(String args[]) {
// Your Code Here
int m,n,k,s;

	char park[100][100];
	for(int i=0;i<m;i++){
		for(int j=0;j<n;j++){
			System.out.print(park[i][j]);
		}
	}
	magical_park(park,m,n,k,s);
	return 0;
}

}