#!/usr/bin/env python
import sys

l = [int(line.strip()) for line in open(sys.argv[1])]

del l[0]
while l[0] != 1: del l[0]

while l[-1] != 10: del l[-1]

if len(l) < 3490: raise SystemExit, "Too few good samples"
m = range(1,11) * (len(l) / 10)

for i, (a,b) in enumerate(zip(l, m)):
    if a != b: print i, a, b

if l == m: raise SystemExit, 0 # success
raise SystemExit, 1 # failure