text: #include <stdio.h>  
   
  struct {
      int *list;
  
  } node;
  
  #define PI 3.14159;
  
  int main(void) {
      double R, volume;
      scanf("%lf", &R);
  
      volume = (R * R * R) * (double) 4 / 3 * PI;
      printf("VOLUME = %.3lf\n", volume);
  
      return 0;   
  }