// Checks whether the array contains two elements whose sum is s.
// Input: A list of numbers and an integer s
// Output: return True if the answer is yes, else return False

public static boolean calvalue (int[] numbers, int s){
for (int i=0; i< numbers.length; i++){
    for (int j=i+1; j<numbers.length;j++){
        if (numbers[i] < s){
            if (numbers[i]+numbers[j] == s){
                return true;
                }
            }
        }
    }
    return false;
}