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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 sim(w: i64, h: i64, mut pv: Vec<(i64, i64, i64, i64)>) -> Vec<(i64, i64, i64, i64)> {
for i in 0..pv.len() {
let (mut px, mut py, vx, vy) = pv[i];
px += vx;
py += vy;
if px < 0 {
px += w;
}
if px >= w {
px -= w;
}
if py < 0 {
py += h;
}
if py >= h {
py -= h;
}
pv[i] = (px, py, vx, vy);
}
pv
}
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 pv: Vec<(i64, i64, i64, i64)> = Vec::new();
for line in lines {
let (s, rest) = line.split_once("p=").unwrap();
let (s, rest) = rest.split_once(",").unwrap();
let px = s.parse().unwrap();
let (s, rest) = rest.split_once(" ").unwrap();
let py = s.parse().unwrap();
let (s, rest) = rest.split_once("v=").unwrap();
let (s, rest) = rest.split_once(",").unwrap();
let vx = s.parse().unwrap();
let vy = rest.parse().unwrap();
pv.push((px, py, vx, vy));
}
let w = 101;
let h = 103;
//let w = 11;
//let h = 7;
let pv_orig = pv.clone();
for i in 1..=100 {
pv = sim(w, h, pv);
}
let q1 = pv
.clone()
.into_iter()
.filter(|(px, py, vx, vy)| *px > w / 2 && *py < h / 2)
.collect::<Vec<_>>()
.len();
let q2 = pv
.clone()
.into_iter()
.filter(|(px, py, vx, vy)| *px < w / 2 && *py < h / 2)
.collect::<Vec<_>>()
.len();
let q3 = pv
.clone()
.into_iter()
.filter(|(px, py, vx, vy)| *px > w / 2 && *py > h / 2)
.collect::<Vec<_>>()
.len();
let q4 = pv
.clone()
.into_iter()
.filter(|(px, py, vx, vy)| *px < w / 2 && *py > h / 2)
.collect::<Vec<_>>()
.len();
let res1 = q1 * q2 * q3 * q4;
let mut res2 = 0;
pv = pv_orig.clone();
for i in 1.. {
pv = sim(w, h, pv);
//println!("{:?}", pv);
if pv == pv_orig {
println!("END OF SIM {}", i);
break;
}
let mut diag1 = 0;
for i in 0..pv.len() {
let (px, py, vx, vy) = pv[i];
if py < -px * h / (w / 2) + h {
diag1 += 1;
}
}
let mut diag2 = 0;
for i in 0..pv.len() {
let (px, py, vx, vy) = pv[i];
if py < px * h / (w / 2) - h {
diag2 += 1;
}
}
//if diag1 < 110 && diag2 < 110 {
if i == 7916 {
res2 = i;
println!("{}", i);
let mut m: Vec<Vec<i64>> = vec![vec![0; w as usize]; h as usize];
for i in 0..pv.len() {
let (px, py, vx, vy) = pv[i];
m[py as usize][px as usize] += 1;
}
for y in 0..m.len() {
for x in 0..m[0].len() {
if m[y][x] == 0 {
print!(" ");
} else {
print!("{}", m[y][x]);
}
}
println!();
}
}
}
println!("res1: {}", res1);
println!("res2: {}", res2);
assert_eq!(res1, 221142636);
assert_eq!(res2, 7916);
}
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