Alitaulukot

use std::io::{self, BufRead};

fn main() {
    let mut lines = io::BufReader::new(io::stdin()).lines();

    let line1 = lines.next().unwrap().unwrap();
    let line2 = lines.next().unwrap().unwrap();
    let mut line1 = line1.split_whitespace();
    let mut line2 = line2.split_whitespace();

    let n: i32 = line1.next().unwrap().parse().unwrap();
    let k: i32 = line1.next().unwrap().parse().unwrap();

    let mut arr = Vec::<i32>::new();
    for _ in 0..n {
        arr.push(line2.next().unwrap().parse().unwrap());
    }
    
    println!("{}", f(&arr, k));
}


fn f(arr: &[i32], k: i32) -> u64 {
    if arr.len() < 2 {
        return arr.len() as u64;
    }

    if arr.len() == 2 {
        if (arr[0] - arr[1]).abs() <= k {
            return 3;
        } else {
            return 2;
        }
    }

    let mid = arr.len() / 2;
    let mut min = (arr[mid], mid);
    let mut max = (arr[mid], mid);
    let mut left = mid;
    let mut right = mid;

    while max.0 - min.0 <= k && (left > 0 || right < arr.len() - 1) {
        if mid - left < right - mid {
            while left > 0 && arr[left] >= min.0 && arr[left] <= max.0 {
                left -= 1;
            }
            if arr[left] < min.0 {
                min = (arr[left], left);
            }
            if arr[left] > max.0 {
                max = (arr[left], left);
            }
        } else {
            while right > 0 && arr[right] >= min.0 && arr[right] <= max.0 {
                right += 1;
            }
            if arr[right] < min.0 {
                min = (arr[right], right);
            }
            if arr[right] > max.0 {
                max = (arr[right], right);
            }
        }
    }

    let final_left = min.1.min(max.1);
    let final_right = min.1.max(max.1);
    let diff = (final_right - final_left) as u64;

    diff * diff + f(&arr[0..final_right], k) + f(&arr[final_left+1..arr.len()], k)
}

Test 1

Group: 1, 2, 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 100 but the index is 100', inpu...

Test 2

Group: 1, 2, 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 6 but the index is 6', input/co...

Test 3

Group: 1, 2, 3

Verdict: WRONG ANSWER

Test 4

Group: 1, 2, 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 71 but the index is 71', input/...

Test 5

Group: 1, 2, 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 100 but the index is 100', inpu...

Test 6

Group: 2, 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 2000 but the index is 2000', in...

Test 7

Group: 2, 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 6 but the index is 6', input/co...

Test 8

Group: 2, 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 3 but the index is 3', input/co...

Test 9

Group: 2, 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 595 but the index is 595', inpu...

Test 10

Group: 2, 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 2000 but the index is 2000', in...

Test 11

Group: 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 100000 but the index is 100000'...

Test 12

Group: 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 7 but the index is 7', input/co...

Test 13

Group: 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 3 but the index is 3', input/co...

Test 14

Group: 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 99399 but the index is 99399',...

Test 15

Group: 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 100000 but the index is 100000'...

Test 16

Group: 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 50002 but the index is 50002',...

Test 17

Group: 3

Verdict: RUNTIME ERROR

thread 'main' panicked at 'index out of bounds: the len is 50002 but the index is 50002',...