#include <stdio.h>
void main ()
{
	int x,y,z,a,b;
	printf("Enter how much people in the first class\n");
	scanf("%d", &x);
	printf("Enter how much people in the second class\n");
	scanf("%d", &y);
	printf("Enter how much people in the third class\n");
	scanf("%d", &z);
	a=x+y+z;
	b=a/40;
	printf("Buss needed: %d\n", b);
}

#include <stdio.h>
void main ()
{
	int x,y,z,a,b;
	printf("Enter how much people in the first class\n");
	scanf("%d", &x);
	printf("Enter how much people in the second class\n");
	scanf("%d", &y);
	printf("Enter how much people in the third class\n");
	scanf("%d", &z);
	a=x+y+z;
	if (a < 40)
	{
		b = 1;
	}
	else if (a % 40 == 0)
	{
		b = a/40;
	}
	else if (a % 40 != 0)
	{
		b = (a/40) + 1;
	}
	printf("Buss needed: %d\n", b);
}

#include<stdio.h>
void main()
    {
       int a,b,z,y,x,mone=0;
       printf("\n please enter the number of the children in class 1 \n");
       scanf("%d",&x);
       printf("\n please enter the number of the children in class 2 \n");
       scanf("%d",&y);
       printf("\n please enter the number of the children in class 3 \n");
       scanf("%d",&z);
       a=x+y+z;
       if(a%40==0)
	   {
	      b=a/40;
	      printf("\n number of busses: %d \n",&b);
	   }
       else
	  {
	      mone++;
	      a=a/40+mone;
	      printf("\n number of busses: %d \n",&a);
	   }
      flushall();
      getchar();
    }