Problem description

It seems like the year of 2013 came only yesterday. Do you know a curious fact? The year of 2013 is the first year after the old 1987 with only distinct digits.

Now you are suggested to solve the following problem: given a year number, find the minimum year number which is strictly larger than the given one and has only distinct digits.

Input

The single line contains integer y (1000?≤?y?≤?9000) — the year number.

Output

Print a single integer — the minimum year number that is strictly larger than y and all it‘s digits are distinct. It is guaranteed that the answer exists.

Examples

1987

2013

2013

2014
解題思路：題目的意思就是輸入一個4位數的數字y，輸出比它大的最小正數（y的各位數字都不相同），簡單暴力水過！
 

AC代碼：

 1 #include<bits/stdc++.h>
 2 using namespace std;
 3 int main(){
 4     int y;
 5     cin>>y;
 6     for(int i=y+1;;++i){
 7         int a=i%10,b=i/10%10,c=i/100%10,d=i/1000;
 8         if(a!=b && a!=c && a!=d && b!=c && b!=d && c!=d){cout<<i<<endl;break
 
;}
 9     }
10     return 0;
11 }

B - Beautiful Year