#![allow(unused_imports)]

fn main() {
    input! {
        n: usize, m: usize, t: usize,
        a: [Usize1; m],
    }
    let (mut ok, mut ng) = (m, 0);
    while ok.abs_diff(ng) > 1 {
        let mid = (ok + ng) / 2;
        let mut v = vec![0; n];
        for &a in &a {
            v[a] += 1;
        }
        let mut cnt = 0;
        for v in &mut v {
            if *v > mid {
                cnt += *v - mid;
                *v = mid;
            }
        }
        // eprintln!("{mid}: {v:?}");
        for v in v {
            cnt -= cnt.min((mid - v) / t);
        }
        *if cnt == 0 { &mut ok } else { &mut ng } = mid;
    }
    println!("{ok}");
}

use proconio::{input, marker::*};
use std::{cmp::Reverse, collections::*};

#[macro_export]
macro_rules! chmax {
    ($a:expr, $b:expr) => {{
        let tmp = $b;
        if $a < tmp {
            $a = tmp;
            true
        } else {
            false
        }
    }};
}

#[macro_export]
macro_rules! chmin {
    ($a:expr, $b:expr) => {{
        let tmp = $b;
        if $a > tmp {
            $a = tmp;
            true
        } else {
            false
        }
    }};
}

#[macro_export]
/// mvec![]
macro_rules! mvec {
    ($val:expr; ()) => {
        $val
    };
    ($val:expr; ($size:expr $(,$rest:expr)*)) => {
        vec![mvec![$val; ($($rest),*)]; $size]
    };
}