package arraylist;

import java.util.ArrayList;

public class mostfrequentnum {

public static int alonenum(ArrayList<Integer> nums,int key){

int[] result=new int[1000];

for (int i = 0; i < nums.size()-1; i++) {

if(nums.get(i)==key){

int target=nums.get(i+1);

result[target]++;

}

}

int maxFreq = 0;

int mostFrequentNum = -1;

for (int i = 0; i < result.length; i++) {

if (result[i] > maxFreq) {

maxFreq = result[i];

mostFrequentNum = i;

}

}

return mostFrequentNum;

}

public static void main(String[] args) {

ArrayList<Integer> nums=new ArrayList<>();

nums.add(1);

nums.add(100);

nums.add(200);

nums.add(1);

nums.add(100);

int key=1;

System.out.println(alonenum(nums, key));

}

}