import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

S = read().rstrip().decode()

op_ind = []
for i,x in enumerate(S):
    if x in '+-':
        op_ind.append(i)

i = op_ind[0] if op_ind[0] != 0 else op_ind[1]

x = int(S[:i])
y = int(S[i+1:])
op = S[i]

answer = x + y if op == '-' else x - y
print(answer)