exo1.java

/*******
 * Read input from System.in
 * Use: System.out.println to ouput your result to STDOUT.
 * Use: System.err.println to ouput debugging information to STDERR.
 * ***/
package com.isograd.exercise;
import java.util.*;

public class IsoContest {
public static void main( String[] argv ) throws Exception {
		String  line;
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		String[] choices = new String[n];
		for (int i = 0; i < n; i++) {
		    String c = sc.next();
	        choices[i] = c;
		}
		String color1 = "";
		int max1 = 0;
		for (String c : choices) {
		    int count = 0;
    		for (String o : choices) {
		        if (c.equals(o)) {
		            count++;
		        }
		    }
		    if (count > max1) {
		        max1 = count;
		        color1 = c;
		    }
		}
		String color2 = "";
		int max2 = 0;
		for (String c : choices) {
		    if (!c.equals(color1)) {
    		    int count = 0;
        		for (String o : choices) {
    		        if (c.equals(o)) {
    		            count++;
    		        }
    		    }
    		    if (count > max2) {
    		        max2 = count;
    		        color2 = c;
    		    }
		    }
		}
	    System.out.println(color1 + " " + color2);
	}
}

exo2.java

/*******
 * Read input from System.in
 * Use: System.out.println to ouput your result to STDOUT.
 * Use: System.err.println to ouput debugging information to STDERR.
 * ***/
package com.isograd.exercise;
import java.util.*;

public class IsoContest {
public static void main( String[] argv ) throws Exception {
    
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int prev = -1;
		int s = -1;
		int c = 1;
		for (int i = 0; i < n; i++) {
		    int v = sc.nextInt();
	        if (v == prev) {
	            c++;
	        }
		    if (v != prev || i == n - 1) {
		        if (c > s) {
		            s = c;
		        }
		        prev = v;
		        c = 1;
		    }
		}
		System.out.println(s);
	}
}