import java.util.*;
class A{
    public static void main(String [] args){
        List<Integer> a = Arrays.asList(1, 456, 1025, 65, 954, 2789, 4, 8742, 1040, 3254);
        int trioIndex = -1; //not found
        int trioMaxSum = Integer.MIN_VALUE; //minimal value
        for(int i=0; i<a.size()-2; i++){
            int currentSum = a.get(i)+a.get(i+1)+a.get(i+2);
            if(currentSum>trioMaxSum) {
                trioMaxSum = currentSum;
                trioIndex = i;
            }
        }
        if(trioIndex>=0){
            System.out.println("index = "+trioIndex);
            System.out.println("trio  = "+a.subList(trioIndex,trioIndex+3));
            System.out.println("sum   = "+trioMaxSum);
        }else{
            System.out.println("not found");
        }
    }
}