#include <stdio.h>
#include <math.h>

int main()
{
    int a, b;
    char c;
    float x;
    printf ("Vvedite dva chisla\n");
    scanf ("%d %d", &a, &b);
    printf ("Vvedite deystvie: +, -, *, / or sqrt\n");
    scanf ("%s", &c);
    if (c=='+')
    {
        x=a+b;
    }
    if (c=='-')
    {
        x=a-b;
    }
    if (c=='*')
    {
        x=a*b;
    }
    if (c=='/')
    {
        if (b==0)
        {
            printf ("YOU DO IT WRONG\n");
        }
        else
        {
            x=a/b;
        }
    }
    printf ("%f", x);
}