#include<stdio.h>
#include<stdlib.h>
int main()
{
    int a, b;
    char c;
    scanf_s("%d %c %d", &a, &c, &b);
    switch (c) 
    {
    case('-'):
    {printf("%d", a - b);
    break;
    }  
    case('+'):
    {printf("%d", a + b);
    break;
    }
    case('*'):
    {printf("%d", a * b);
    break;
    }
    case('/'):
    {printf("%d", a / b);
    break;
    }
    case('%'):
    {printf("%d", a % b);
    break;
    }
    default:printf("ERROR");
    }
    return 0;
}