Suppose in a multiprogramming environment, the following C program segment is…

Suppose in a multiprogramming environment, the following C program segment is executed. A process goes into I/O queue whenever an I/O related operation is performed. Assume that there will always be a context switch whenever a process requests for an I/O, and also whenever the process returns from an I/O. The number of times the process will enter the ready queue during its lifetime (not counting the time the process enters the ready queue when it is run initially) is _______. (Answer in integer) 

int main() {

  int x=0,i=0;

  scanf("%d",&x);

   for(i=0; i<20; i++)

   { x = x+20;

    printf("%d\n",x);

   } return 0;

}