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 Python (3.4.3) (judge verdict: Runtime Error)

N = int(input())
Tlist = [int(N) for N in input().split()]
M = int(input())
PXlist = [[int(i) for i in input().split()]for j in range(M)]
def time_sum():
    s = 0
    for i in range(0,N):
        s = s+Tlist[i]
    return s
def time_cal():
    empty = []
    for i in range(0,M):
        empty.append(time_sum() - Tlist[PXlist[i][0]-1] + PXlist[i][1])
    return empty
print(time_sum)
for i in time_cal():
    print(i)