#![allow(non_snake_case, unused_must_use, unused_imports)]
use std::io::{self, prelude::*};

fn main() {
    let (stdin, stdout) = (io::read_to_string(io::stdin()).unwrap(), io::stdout());
    let (mut stdin, mut buffer) = (stdin.split_whitespace(), io::BufWriter::new(stdout.lock()));
    macro_rules! input {
        ($t: ty, $n: expr) => {
            (0..$n).map(|_| input!($t)).collect::<Vec<_>>()
        };
        ($t: ty) => {
            stdin.next().unwrap().parse::<$t>().unwrap()
        };
    }

    let A = input!(u32);
    let B = input!(u32);
    let C = input!(u32);
    let D = input!(u32);

    for n in 0.. {
        if A * n <= C && B * n <= D {
            continue;
        }

        writeln!(buffer, "{}", n - 1);
        break;
    }
}