OJ Board

My English is not good (excuse me for mistakes)
I wanted to use pow function in my code I used cmath header file (#include <cmath>) but I got WA. I submitted my code several time but got WA . I wrote my own power function I got Accept Answer.

Can you give us more details?

Perhaps you didn't presume that pow() takes and returns doubles?

You can use cmath if you are using C++ as the language.And one more thing
I think you will get a Compile Error rather than WA, if some library is not supported.Also pow() returns a floating point result(double), so it has to be properly rounded...maybe that was where your code got a WA.