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

main ()
{
int number;
int i,j,k;
printf("step1 %d \n ",number);
number=50;
printf("step2 %d \n ",number);

i=5; j=8; k=2;

printf("\n%d\n",i+j*k+i*2);
printf("\n%d\n",(20 + i) / (i * j) + 5 - 2 * j);
printf("\n%f\n",(float)(i/k) * 2 + j % 2);
}