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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- int l, r;
- scanf("%d %d", &l, &r);
- for(int i = l; i <= r; i++)
- {
- int x = i;
- int c = 0;
- set<int>s;
- while(x > 0)
- {
- c++;
- s.insert(x % 10);
- x /= 10;
- }
- if(s.size() == c)
- {
- printf("%d\n", i);
- return 0;
- }
- }
- printf("-1\n");
- }
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