#!/usr/bin/env python
# line - print the nth line of a file
# usage: line n < file

import sys
n = int(sys.argv[1])
if n < 1:
    sys.stderr.write("line: n must be a positive integer\n")
    sys.exit(1)
for i, line in enumerate(sys.stdin):
    if i == n-1:
        sys.stdout.write(line)
        break