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 <stdlib.h>

int opera( int a, int b, char c) {
	if (c == '+')
		return a+b;
	return a-b;
	}

int main() {
	int *num1 = malloc(sizeof(int)), *num2 = malloc(sizeof(int));
	char * op;
	op = malloc(sizeof(char));
	scanf("%d %c %d", &num1, &op, &num2);
	//printf("%d %c %d", num1, op, num2);
	printf("%d\n",opera(num1,num2,op));
	return 0;
}