diff options
| -rw-r--r-- | day11/.vscode/launch.json | 43 | ||||
| -rw-r--r-- | day11/Cargo.lock | 4 | ||||
| -rw-r--r-- | day11/Cargo.toml | 6 | ||||
| -rw-r--r-- | day11/src/main.rs | 76 |
4 files changed, 129 insertions, 0 deletions
diff --git a/day11/.vscode/launch.json b/day11/.vscode/launch.json new file mode 100644 index 0000000..9966abf --- /dev/null +++ b/day11/.vscode/launch.json @@ -0,0 +1,43 @@ +{ + // Use IntelliSense to learn about possible attributes. + // Hover to view descriptions of existing attributes. + // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387 + "version": "0.2.0", + "configurations": [ + { + "type": "lldb", + "request": "launch", + "name": "Debug executable 'day11'", + "cargo": { + "args": [ + "build", + "--bin=day11", + "--package=day11" + ], + "filter": { + "kind": "bin" + } + }, + "args": [], + "cwd": "${workspaceFolder}" + }, + { + "type": "lldb", + "request": "launch", + "name": "Debug unit tests in executable 'day11'", + "cargo": { + "args": [ + "test", + "--no-run", + "--bin=day11", + "--package=day11" + ], + "filter": { + "kind": "bin" + } + }, + "args": [], + "cwd": "${workspaceFolder}" + } + ] +}
\ No newline at end of file diff --git a/day11/Cargo.lock b/day11/Cargo.lock new file mode 100644 index 0000000..3436c4e --- /dev/null +++ b/day11/Cargo.lock @@ -0,0 +1,4 @@ +[[package]] +name = "day11" +version = "0.1.0" + diff --git a/day11/Cargo.toml b/day11/Cargo.toml new file mode 100644 index 0000000..dc808c8 --- /dev/null +++ b/day11/Cargo.toml @@ -0,0 +1,6 @@ +[package] +name = "day11" +version = "0.1.0" +authors = ["Jan Tuomi <jan.tuomi@eficode.com>"] + +[dependencies] diff --git a/day11/src/main.rs b/day11/src/main.rs new file mode 100644 index 0000000..c632acf --- /dev/null +++ b/day11/src/main.rs @@ -0,0 +1,76 @@ +static INPUT: i32 = 9005; +static WIDTH: usize = 300; +static HEIGHT: usize = 300; + +type Grid = Vec<Vec<i32>>; + +fn build_grid() -> Grid { + let mut grid = vec![vec![0; WIDTH]; HEIGHT]; + for y in 1..HEIGHT + 1 { + for x in 1..WIDTH + 1 { + if y == 5 && x == 3 { + print!(""); + } + let rack_id: i32 = x as i32 + 10; + let mut level = rack_id * y as i32; + level += INPUT; + level *= rack_id; + level = nth_digit(level, 3); + level -= 5; + + let xi = (x - 1) as usize; + let yi = (y - 1) as usize; + grid[yi][xi] = level; + } + } + grid +} + +fn nth_digit(number: i32, n: u32) -> i32 { + (number % 10i32.pow(n)) / 10i32.pow(n - 1) +} + +fn sum_subsquare(grid: &Grid, pos: (usize, usize), size: usize) -> i32 { + let mut total = 0i32; + for y in pos.1..pos.1 + size { + for x in pos.0..pos.0 + size { + total += grid[y][x]; + } + } + total +} + +fn visualize(grid: &Grid) { + for line in grid { + for ch in line { + print!("{} ", ch); + } + print!("\n"); + } +} + +fn main() { + let grid = build_grid(); + // visualize(&grid); + + let mut max_sum = std::i32::MIN; + let mut mx: usize = 0; + let mut my: usize = 0; + let mut msize: usize = 0; + for s in 1..301 { + println!("Debug: Running for size = {}", s); + for y in 0..HEIGHT - s + 1 { + for x in 0..WIDTH - s + 1 { + let sum = sum_subsquare(&grid, (x, y), s); + if sum > max_sum { + max_sum = sum; + mx = x; + my = y; + msize = s; + } + } + } + } + + println!("Max sum {} at ({}, {}), size: {}", max_sum, mx + 1, my + 1, msize); +} |