#include <stdio.h>

int main()
{
  FILE *fr, *fw;
  int a;

  fr = fopen("in.txt", "r");
  fw = fopen("out.txt", "w");

  for (int i = 0; i < 20; i++)
  {
    fscanf(fr, "%d", &a);
    fprintf(fw, "%d", a);
  }

  fclose(fr);
  fclose(fw);

  return 0;
}