Problem:
Score : 200 points

Problem Statement

Given are 1-digit positive integers a and b. Consider these two strings: the concatenation of b copies of the digit a, and the concatenation of a copies of the digit b. Which of these is lexicographically smaller?

Constraints

1 \leq a \leq 9

1 \leq b \leq 9

a and b are integers.

Input

Input is given from Standard Input in the following format:

a b

Output

Print the lexicographically smaller of the two strings. (If the two strings are equal, print one of them.)

Sample Input 1

4 3

Sample Output 1

3333

We have two strings 444 and 3333. Between them, 3333 is the lexicographically smaller.

Sample Input 2

7 7

Sample Output 2

7777777

Solution in Rust (1.15.1) (judge verdict: Accepted)

use std::io::Read;
use std::io::*;
use std::str::FromStr;
     
fn read<T: FromStr>() -> T {
    let stdin = stdin();
    let stdin = stdin.lock();
    let token: String = stdin
        .bytes()
        .map(|c| c.expect("failed to read char") as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect();
    token.parse().ok().expect("failed to parse token")
}
    
fn main() {
    let _a: String = read();
    let _b: String = read();
    let mut iter_a = _a.split_whitespace();
    let mut iter_b = _b.split_whitespace();
    let a: i32 = iter_a.next().unwrap().parse().unwrap();
    let b: i32 = iter_b.next().unwrap().parse().unwrap();

    if a < b {
        for _ in 0..b {
            print!("{}", a);
        }
    } else {
        for _ in 0..a {
            print!("{}", b);
        }
    }
}