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- #include<bits/stdc++.h>
- using namespace std;
- bool unique(string str)
- {
- sort(str.begin(), str.end());
- for (int i = 0; i < str.length(); i++) {
- if (str[i] == str[i + 1]) {
- return false;
- }
- }
- return true;
- }
- int main()
- {
- long long int i,j,k,m=0,l,n,o=0,p=0,x;
- map<char ,int> ma,mb;
- map<char ,int> ::iterator im;
- string s,c;
- cin>>x>>m;
- int one=0,two=0,three=0,four=0,five=0,six=0,seven=0,eight=0,nine=0,zero=0;
- p=0;
- for(i=x;i<=m;i++)
- {
- ostringstream s;
- s << i;
- string c = s.str();
- if(unique(c))
- {
- p=i;
- }
- }
- if(p>0)
- {
- cout<<p<<endl;
- }
- else
- {
- cout<<-1<<endl;
- }
- }
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