#include <stdio.h>

main() {
  char buf[BUFSIZ];
  int prev = 0;
  int cur  = 0;
  int i = 0;

  while(fgets(buf, sizeof(buf), stdin)) {
    cur = atoi(buf);
    if(!prev) {
      prev = cur;
      continue;
    }

    printf("%d %d\n", ++i, cur-prev);
    prev = cur;
  }
}