What is a program?

Let's start with the basics. What is a program?

When we talk about a program, we're talking about a set of instructions that a computer can understand and execute.

Generally speaking, every computer instruction is doing one of two things:

1. Moving information, such as saving text to a file or saving numbers to memory
2. Manipulating information, such as adding two numbers together or replacing words in a sentence

All programs are made up of these two types of instructions. The instructions are written in a programming language that the computer can understand.

Here's an example of a program written in C, a popular programming language:

#include <stdio.h>

int main() {
    int a, b;

    scanf("%d %d", &a, &b);

    int sum = a + b;

    printf("The sum of %d and %d is %d\n", a, b, sum);

    return 0;
}

This program is doing the following:

1. Moving information from standard input (the keyboard) into variables a and b.
2. Manipulating information by adding a and b together and moving the result into a new variable sum.
3. Moving information from the variables a, b, and sum to standard output (the screen).

The actual happening behind the scene is a bit more complicated than this, but this is a good enough explanation for now.

Now, please implement a similar program, but read three numbers (a, b, and c respectively) from standard input and print the result of a + b - c to standard output.

Input

The first line contains three positive integers not exceeding 1000, separated by spaces.

Output

Print the result of a + b - c to standard output without other characters, and end with a newline ( ).

Input

There is no input.

Output

There is no output.

Samples

Sample #0

1 + 2 - 3 = 0

Sample #1

100 + 300 - 1 = 299

Testcases

Policies

The total score of this problem is 10000.

Hint

There is no hint.