Problem:
Score : 400 points

Problem Statement

Given are three integers N, K, and S.

Find a sequence A_1, A_2, ..., A_N of N integers between 1 and 10^9 (inclusive) that satisfies the condition below.
We can prove that, under the conditions in Constraints, such a sequence always exists.

There are exactly K pairs (l, r) of integers such that 1 \leq l \leq r \leq N and A_l + A_{l + 1} + \cdots + A_r = S.

Constraints

1 \leq N \leq 10^5

0 \leq K \leq N

1 \leq S \leq 10^9

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N K S

Output

Print a sequence satisfying the condition, in the following format:

A_1 A_2 ... A_N

Sample Input 1

4 2 3

Sample Output 1

1 2 3 4

Two pairs (l, r) = (1, 2) and (3, 3) satisfy the condition in the statement.

Sample Input 2

5 3 100

Sample Output 2

50 50 50 30 70

Solution in Rust (1.15.1) (judge verdict: Wrong Answer)

use std::io;
//use std::collections::HashMap;
//use std::collections::BinaryHeap;
//use std::collections::HashSet;
//use std::mem; // mem::swap(&mut x,&mut y);
use std::cmp; // cmp::max,cmp::min

// Rust memo: https://hackmd.io/i0lQY1OKTDW1t66TECOmiw?both

#[allow(dead_code)]
fn read_line() -> String {
    let mut s = String::new();
    io::stdin().read_line(&mut s).unwrap();
    s.trim().to_string()
}

#[allow(dead_code)]
fn read_charvec() -> Vec<char> {
    read_line().chars().collect()
}

#[allow(dead_code)]
fn read_ints() -> Vec<i64> {
    let s = read_line();
    let split: Vec<&str> = s.split(" ").collect();
    split
        .iter()
        .map(|&x| x.to_string().parse().unwrap())
        .collect()
}

#[allow(dead_code)]
fn read_int() -> i64 {
    read_ints()[0]
}

#[allow(dead_code)]
fn reverse(s: &String) -> String {
    s.chars().rev().collect::<String>()
}

#[allow(dead_code)]
fn read_lines(n: i64) -> Vec<String> {
    let mut xs = Vec::new();

    for _i in 0..n {
        xs.push(read_line());
    }

    xs
}

#[allow(dead_code)]
fn read_ints2(n: i64) -> Vec<i64> {
    read_lines(n).iter().map(|x| x.parse().unwrap()).collect()
}

#[allow(dead_code)]
fn arange(start: i64, end: i64, step: i64) -> Vec<i64> {
    let mut ret = Vec::new();
    let mut i = start;

    while i < end {
        ret.push(i);
        i += step;
    }

    ret
}

#[allow(dead_code)]
const DXS: [i64; 4] = [0, 0, 1, -1];
#[allow(dead_code)]
const DYS: [i64; 4] = [1, -1, 0, 0];
#[allow(dead_code)]
const INF: i64 = 999999999;
#[allow(dead_code)]
const N_PRIME: i64 = 1000000007;

////////////////////////////////////////////////

fn main() {
    let xs = read_ints();
    let (n, k, s) = (xs[0] as usize, xs[1] as usize, xs[2]);

    let vs = if n == k {
        vec![s; n]
    } else {
        let mut ret = vec![];
        let vals = [s / 2, s - s / 2];
        let buff = if s < 100 { 10000 } else { 1 };

        for i in 0..k + 1 {
            ret.push(vals[i % 2]);
        }

        for _i in 0..n - k {
            ret.push(buff);
        }

        ret
    };

    for i in 0..vs.len() - 1 {
        print!("{} ", vs[i]);
    }

    println!("{}", vs[vs.len() - 1]);
}