#include <stdio.h>
#include <stdlib.h>
int main(){
  int *a = malloc(sizeof(int)), *b = malloc(sizeof(int));
  char *op = malloc(sizeof(char));
  scanf("%d", a);
  scanf(" %c[^" "]", op);
  scanf("%d", b);
  if(*op == '+') printf("%d\n", *a + *b);
  if(*op == '-') printf("%d\n", *a - *b);
  free(a);
  free(b);
  free(op);
}