// copy doubles from standard input to standard output
 
#include <stdio.h>
 
int main( void)
{
  int s; // scanf return status
 
  double d;
 
  while( 1) // until end-of-file or error
  {
    s = scanf("%lf",&d); // try to read one double
 
    if( s != 1) // could not read one double, must be end-of-file or error
      break;
 
    printf( "%g\n", d);
  }
 
  return 0;
}