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 <string.h>
#include <stdbool.h>

#define N_MAX 100
#define M_MAX 1000
#define INF 10000000
#define SMAP(a, b) ((a)!=(b))&&((a)^=((b)^=((a)^= (b))))

typedef unsigned long long ull;

int d[M_MAX];
int n, m;

int i, j, k;

int e[M_MAX][2];

void deb(){
	return;
}

void solve(){
	return;
}

int main (void) {
	char x;
	scanf("%d %c %d\n", &i, &x, &k);

	printf("%d\n", i + ((x == '+')? k : -k));

	solve();
	return 0;
}