Problem:
Score : 100 points

Problem Statement

Joisino wants to evaluate the formula "A op B".
Here, A and B are integers, and the binary operator op is either + or -.
Your task is to evaluate the formula instead of her.

Constraints

1≦A,B≦10^9

op is either + or -.

Input

The input is given from Standard Input in the following format:

A op B

Output

Evaluate the formula and print the result.

Sample Input 1

1 + 2

Sample Output 1

3

Since 1 + 2 = 3, the output should be 3.

Sample Input 2

5 - 7

Sample Output 2

-2

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>
#include <math.h>
#include <string.h>
int main(void) {
	int A, B;
	char op;
	/* 出力が合わなかった理由→空白も入力に含まれる */
	scanf("%d %c %d", &A, &op, &B);
	if (op == '+') {
		printf("%d", A + B);
	}
	else {
		printf("%d", A - B);
	}


	return 0;

}