맞은 코드

#include
#include
#include

using namespace std;

int main(){
cin.tie(NULL);
cout.tie(NULL);
ios::sync_with_stdio(false);

string A, B;

cin >> A >> B;

reverse(A.begin(), A.end());
reverse(B.begin(), B.end());

string bigger = (stoi(A)>stoi(B)) ? A : B;

cout << bigger;

return 0;
}

틀린 코드

#include
#include
#include

using namespace std;

int main(){
cin.tie(NULL);
cout.tie(NULL);
ios::sync_with_stdio(false);

string A, B;

cin >> A >> B;

reverse(A.begin(), A.end());
reverse(B.begin(), B.end());

cout << (stoi(A)>stoi(B)) ? A : B;

return 0;
}

왜 2번째 코드가 틀렸다고 되나요?