Write a program that reads a sequence of integer numbers from the input and determine if there are two numbers in the sequence such that their sum is equal to 1000. If the sequence contains the numbers, the program must print 'Yes', if it doesn't, it must print 'No'.

Write a program that reads a set of floating-point values. ask the user to enter the values, then print • the average of the values. • the smallest of the values. • the largest of the values. • the range, that is the difference between the smallest and largest. of course, you may only prompt for the values once.