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#![allow(dead_code)]
#![allow(unused_variables)]
#![allow(unused_mut)]
use std::env;
use std::fs::File;
use std::io::Read;
fn horizontal(lx: usize, ly: usize, m: &Vec<Vec<char>>) -> usize {
let mut count = 0;
for y in 0..ly {
for x in 0..lx - 3 {
if m[y][x] == 'X' && m[y][x + 1] == 'M' && m[y][x + 2] == 'A' && m[y][x + 3] == 'S' {
count += 1;
}
if m[y][x] == 'S' && m[y][x + 1] == 'A' && m[y][x + 2] == 'M' && m[y][x + 3] == 'X' {
count += 1;
}
}
}
count
}
fn vertical(lx: usize, ly: usize, m: &Vec<Vec<char>>) -> usize {
let mut count = 0;
for y in 0..ly - 3 {
for x in 0..lx {
if m[y][x] == 'X' && m[y + 1][x] == 'M' && m[y + 2][x] == 'A' && m[y + 3][x] == 'S' {
count += 1;
}
if m[y][x] == 'S' && m[y + 1][x] == 'A' && m[y + 2][x] == 'M' && m[y + 3][x] == 'X' {
count += 1;
}
}
}
count
}
fn diag1(lx: usize, ly: usize, m: &Vec<Vec<char>>) -> usize {
let mut count = 0;
for y in 0..ly - 3 {
for x in 0..lx - 3 {
if m[y][x] == 'X'
&& m[y + 1][x + 1] == 'M'
&& m[y + 2][x + 2] == 'A'
&& m[y + 3][x + 3] == 'S'
{
count += 1;
}
if m[y][x] == 'S'
&& m[y + 1][x + 1] == 'A'
&& m[y + 2][x + 2] == 'M'
&& m[y + 3][x + 3] == 'X'
{
count += 1;
}
}
}
count
}
fn diag2(lx: usize, ly: usize, m: &Vec<Vec<char>>) -> usize {
let mut count = 0;
for y in 0..ly - 3 {
for x in 0..lx - 3 {
if m[y][x + 3] == 'X'
&& m[y + 1][x + 2] == 'M'
&& m[y + 2][x + 1] == 'A'
&& m[y + 3][x] == 'S'
{
count += 1;
}
if m[y][x + 3] == 'S'
&& m[y + 1][x + 2] == 'A'
&& m[y + 2][x + 1] == 'M'
&& m[y + 3][x] == 'X'
{
count += 1;
}
}
}
count
}
fn mas(lx: usize, ly: usize, m: &Vec<Vec<char>>) -> usize {
let mut count = 0;
for y in 1..ly - 1 {
for x in 1..lx - 1 {
if m[y][x] != 'A' {
continue;
}
let a = [
m[y - 1][x - 1],
m[y - 1][x + 1],
m[y + 1][x + 1],
m[y + 1][x - 1],
];
if a == ['M', 'M', 'S', 'S']
|| a == ['S', 'M', 'M', 'S']
|| a == ['S', 'S', 'M', 'M']
|| a == ['M', 'S', 'S', 'M']
{
count += 1;
}
}
}
count
}
fn main() {
let args: Vec<String> = env::args().collect();
let filename = if args.len() == 1 {
"in/".to_owned() + args[0].split('/').last().unwrap() + ".pzl"
} else {
args[1].clone()
};
let mut f = File::open(filename).expect("cannot open file");
let mut content = String::new();
f.read_to_string(&mut content).expect("cannot read file");
let lines = content.trim_end().split("\n");
let mut m: Vec<Vec<char>> = Vec::new();
for line in lines {
let mut l: Vec<char> = Vec::new();
for c in line.bytes() {
l.push(c as char)
}
m.push(l)
}
//println!("{:?}", m);
let ly = m.len();
let lx = m[0].len();
let mut res1 = 0;
res1 += horizontal(lx, ly, &m);
res1 += vertical(lx, ly, &m);
res1 += diag1(lx, ly, &m);
res1 += diag2(lx, ly, &m);
let res2 = mas(lx, ly, &m);
println!("res1: {}", res1);
println!("res2: {}", res2);
assert_eq!(res1, 2575);
assert_eq!(res2, 2041);
}
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