def calc_unseq_string(a, b):
if b not in a:
return len(b)
return calc_unseq_string(b[1:], a)
a = input()
b = input()
if a == b:
print(-1)
else:
sequence1 = calc_unseq_string(a, b)
sequence2 = calc_unseq_string(b, a)
print(max(sequence1, sequence2))
#include <iostream>
using namespace std;
int main()
{
string a,b;
cin>>a>>b;
if (a==b)
cout <<-1<<"\n";
if (a!=b)
if (a.size()>b.size())
cout <<a.size()<<"\n";
else
cout <<b.size()<<"\n";
return 0;
}
981A - Antipalindrome | 365A - Good Number |
1204B - Mislove Has Lost an Array | 1409D - Decrease the Sum of Digits |
1476E - Pattern Matching | 1107A - Digits Sequence Dividing |
1348A - Phoenix and Balance | 1343B - Balanced Array |
1186A - Vus the Cossack and a Contest | 1494A - ABC String |
1606A - AB Balance | 1658C - Shinju and the Lost Permutation |
1547C - Pair Programming | 550A - Two Substrings |
797B - Odd sum | 1093A - Dice Rolling |
1360B - Honest Coach | 1399C - Boats Competition |
1609C - Complex Market Analysis | 1657E - Star MST |
1143B - Nirvana | 1285A - Mezo Playing Zoma |
919B - Perfect Number | 894A - QAQ |
1551A - Polycarp and Coins | 313A - Ilya and Bank Account |
1469A - Regular Bracket Sequence | 919C - Seat Arrangements |
1634A - Reverse and Concatenate | 1619C - Wrong Addition |