#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
    {
             int b=5, i, t, A, step, max, min, y;
             
             t=0;
             A=0;
             step=0;
             min=0;
             max=0;
             
             while (A==0)
                 {printf(" A = ");
                  scanf("%d",&A);}
             
             while (step<=0)
                 {printf("step>0  step=");
                  scanf("%d",&step);}
             
             if (A>0) 
                  {for(i=-A;i<=A;i+=step)
                     {                     
                      y=i*i+b;
                      if (t==0)  
                           {min=y;  
                            max=y;
                            t=1;}
                         else {if (y<min)  min=y;
                               if (y>max)  max=y;}              
                     } 
                  }
             
             else 
                  {for(i=-A;i>=A;i-=step)
                     {                     
                      y=i*i+b;
                      if (t==0)  
                           {min=y;  
                            max=y;
                            t=1;}
                         else {if (y<min)  min=y;
                               if (y>max)  max=y;}              
                     } 
                  }
 
             if (min==max) printf("funkciy imeet tiolko odno znachenye: %d\n", y);
               else {printf("minimalnoe   znachenye: %d\n", min);
                     printf("maximalnoe   znachenye: %d\n", max);}     
                  

             system("PAUSE"); 
             return 0;
         }