Codeforces Round #347 (Div.2)_A. Complicated GCD

题目链接：http://codeforces.com/contest/664/problem/A

A. Complicated GCD

time limit per test

1 second

memory limit per test

256 megabytes

input

standard input

output

standard output

Greatest common divisor GCD(a, b) of two positive integers a and b is equal to the biggest integer d such that both integers a and bare divisible by d. There are many efficient algorithms to find greatest common divisor GCD(a, b), for example, Euclid algorithm.

Formally, find the biggest integer d, such that all integers a, a + 1, a + 2, ..., b are divisible by d. To make the problem even more complicated we allow a and b to be up to googol, 10100 — such number do not fit even in 64-bit integer type!

Input

The only line of the input contains two integers a and b (1 ≤ a ≤ b ≤ 10100).

Output

Output one integer — greatest common divisor of all integers from a to b inclusive.

Examples

input

1 2

output

1

input

61803398874989484820458683436563811772030917980576 61803398874989484820458683436563811772030917980576

output

61803398874989484820458683436563811772030917980576

解题报告：

可以看到，两个字符串相同，输出这个字符串，否则输出1；

#include <stdio.h>
#include <iostream>
#include <string>

using namespace std;

int main()
{
    string a,b;
    cin>>a>>b;
    if(a==b) cout<<a<<endl;
    else cout<<""<<endl;
    return ;
}