YouTube links challenge not accepting correct answer?

Question

I tried to solve the YouTube links challenge with cpp. My code seemed to have given the correct output but it wasn't accepted as correct. This is the code:

'''cpp
#include <iostream>
#include <algorithm>
using namespace std;

int main() {
string url;
string result;

cin >> url;
for (size_t i=url.size();i>0;i--) {
if (url[i]=='='||url[i]=='/') {
break;
}
result += url[i];
}
reverse(result.begin(), result.end());
cout <<result;
return 0;
}
'''

Answer 1

Do any of the test cases pass? Does it fail on any of the test cases?

Answer 2

Alejandra Camus the problem is that your output includes the non-printable terminating null from the end of the input string. HINT: Check your loop limits.

Answer 3

Brian , good catch. Solved!

Answer 4

The first 2 test cases (the only ones unlocked) fail, even though the output of the test cases seems to be exactly the output of my program in both test cases