How is it incorrect?

No, it only returns True if cnt == 0, which means you have to close all opening ones.

Everybody knows that.

Because it looks like we are pros I think =))

Thanks for your help.

That's a lot of brains.

I am an expert from now.

From what I can see, .begin() is before the 1st element and .end() is after the last element. Is that right?

Why?

Almost a year later, still the same issue.

Why do we need to add 1 to percent / 100?

Wow so easy to understand.

Damn, you have found a bug.

Good to know new thing.