1-18字符串对比

#include
#include
#include
using namespace std;

string lower(string s){
	transform(s.begin(), s.end(), s.begin(), ::tolower);
	return s;
}

int cmp(string s1, string s2){
	if(s1.length() != s2.length())
		return 1;
	if(s1 == s2)
		return 2;
	if(lower(s1) == lower(s2))
		return 3;
	return 4;
}

int main(){
	string s1, s2;
	cin >> s1 >> s2;
	cout << cmp(s1, s2);
	return 0;
}