蓝桥杯 ADV-95 算法提高 字符串比较

#include <iostream>
using namespace std;
int main() {
string a, b;
cin >> a >> b;
int lena = a.length();
int lenb = b.length();
int len = lena > lenb ? lena : lenb;
for(int i = 0; i < len; i++) {
if(a[i] > b[i]) {
cout << "1";
return 0;
}
if(a[i] < b[i]) {
cout << "-1";
return 0;
}
}
if(lena == lenb) {
cout << "0";
} else if(lena > lenb) {
cout << "1";
}else {
cout << "-1";
}
return 0;
}