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#!/usr/local/bin/node
//
// See https://theweeklychallenge.org/blog/perl-weekly-challenge-151
//
//
// Run as: node ch-1.js < input-file
//
require ('readline')
. createInterface ({input: process . stdin})
. on ('line', line => {
let tree = line . split ("\|") . map (row => row . trim () . split (/ +/))
for (let d = 0; d < tree . length; d ++) {
if (d == tree . length - 1) {
return
}
let c_row = tree [d]
let n_row = tree [d + 1]
for (let i = 0; i < c_row . length; i ++) {
let ch1 = 2 * i
let ch2 = 2 * i + 1
if (c_row [i] != "*" &&
(ch1 >= n_row . length || n_row [ch1] == "*") &&
(ch2 >= n_row . length || n_row [ch2] == "*")) {
console . log (d + 1)
return;
}
}
}
})
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