Ruudukko

warning: unused variable: `s`
  --> input/code.rs:16:36
   |
16 |     let grid = (0..grid_size).map(|s| {
   |                                    ^ help: if this is intentional, prefix it with an underscore: `_s`
   |
   = note: `#[warn(unused_variables)]` on by default

warning: function is never used: `as_index`
 --> input/code.rs:3:4
  |
3 | fn as_index(grid_size: usize, x: usize, y: usize) -> usize {
  |    ^^^^^^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: unused `Result` that must be used
  --> input/code.rs:11:5
   |
11 |     stdin.read_line(&mut input);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `#[warn(unused_must_use)]` on by default
   = note: this `Result` may be an `Err` variant, which should be handled

warning: unused `Result` that must be used
  --> input/code.rs:17:9
   |
17 |         stdin.read_line(&mut input);
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this `Result` may be an `Err` variant, which should be handled

warning:...

const MODULO: usize = 1_000_000_007;

fn as_index(grid_size: usize, x: usize, y: usize) -> usize {
    x + y * grid_size
}

fn main() {
    let stdin = std::io::stdin();

    let mut input = String::new();
    stdin.read_line(&mut input);

    let grid_size = input.trim().parse::<usize>().unwrap();
    input.clear();

    let grid = (0..grid_size).map(|s| {
        stdin.read_line(&mut input);
        let out = input.split_whitespace().map(|n| n.parse::<usize>().unwrap()).collect::<Vec<_>>();
        input.clear();

        out
    }).collect::<Vec<_>>();

    let ans = (0..grid_size).map(|x| {
        (0..grid_size).map(|y| {
            let num = grid[y][x];
            match num {
                1 => 1,
                _ => recurse(&grid, grid_size, x, y, num) + 1,
            }
        }).sum::<usize>()
    }).sum::<usize>();

    println!("{ans}");
}

fn recurse(grid: &Vec<Vec<usize>>, grid_size: usize, x: usize, y: usize, val: usize) -> usize {
    (0..x).chain(x+1..grid_size).map(|i| {
        match grid[y][i] {
            1 => 1,
            num if num < val => recurse(grid, grid_size, i, y, num) + 1,
            _ => 0,
        }
    }).sum::<usize>() % MODULO
    +
    (0..y).chain(y+1..grid_size).map(|i| {
        match grid[i][x] {
            1 => 1,
            num if num < val => recurse(grid, grid_size, x, i, num) + 1,
            _ => 0,
        }
    }).sum::<usize>() % MODULO
}

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

Test 4

Group: 2, 3

Verdict: ACCEPTED

Test 5

Group: 2, 3

Verdict: TIME LIMIT EXCEEDED

Test 6

Group: 2, 3

Verdict: TIME LIMIT EXCEEDED

Test 7

Group: 3

Verdict: ACCEPTED

Test 8

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 9

Group: 3

Verdict: TIME LIMIT EXCEEDED