can someone help me so the sample input be 1 2 7 and the sample output be 10 using the explanation

Objective in this challenge, we're practicing reading input from stdin and printing output to stdout. in C++, you can read a single whitespace-separated token of input using coin, and print output to stdout using cout. For example, let's say we declare the following variables: string s int n; and we want to use cin to read the input "High 5" from stdin. We can do this with the following code: cin > s > n The above code reads the first word CHigh") from stdin and saves it as string s, then reads the second word (5) from stdin and saves it as integer n. If we want to print these values to stdout, we write the following codes cout