fn main() {
    input!{
		a: usize, b: usize, c: usize, d: usize,
	}

	let mut x = INF;
	if a != 0 {
		x = c/a;
	}
	let mut y = INF;
	if b != 0 {
		y = d/b;
	}

	println!("{}", min(x, y));
}

// const MOD17: usize = 1000000007;
// const MOD93: usize = 998244353;
const INF: usize = 1 << 60;
// let dx = vec![!0, 0, 1, 0]; // 上左下右
// let dy = vec![0, !0, 0, 1]; // 上左下右
// let d = vec!{(!0, 0), (0, !0), (1, 0), (0, 1)}; // 上左下右

#[allow(unused)]
use proconio::{input, marker::Chars, marker::Usize1};

#[allow(unused)]
use std::{
	mem::swap,
	cmp::min, cmp::max,
	cmp::Reverse,
	collections::HashSet, collections::BTreeSet,
	collections::HashMap, collections::BTreeMap,
	collections::BinaryHeap,
	collections::VecDeque,
	iter::FromIterator,
};