hello everyone
i'm trying to sort a vector using an explicit compare function
why does this simple code gives me Runtime Error sometimes and sometime Time Limit Exceeded
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hello everyone
i'm trying to sort a vector using an explicit compare function
why does this simple code gives me Runtime Error sometimes and sometime Time Limit Exceeded
Name |
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Short answer: You should change:
to
can you give me the long answer please ?
Here are the requirements for a Compare function: cppreference Basically the compare function needs to define a strict weak ordering. If your compare function returns true, you're telling the sort function that the first value has to appear before the second element. So if
cost(f) == cost(s)
, then the program thinks that the valuef
has to appear befores
, and alsos
has to appear beforef
(becausecost(s) == cost(f)
). So it doesn't know what to do and gives a runtime error.Maybe this is helpful?
EDIT: Sniped
Jakube
dpaleka
thank you very much
I have just tried to compile and run your code using GNU C++17 Custom Invocation in CF
The following is the program output:
Done
=====
Used: 2839 ms, 3660 KB
The following is the program output after replacing the
<=
operator with<
operator in thecomp
function.Done
=====
Used: 15 ms, 3680 KB
i really don't know why this worked ,, sorry