Hi, im newbie here. i trying to learn how to use this site.

why is this code return run time error?

w = int(input()) h = int(input())

area = w*h print(area//2)

Test: #1, time: 278 ms., memory: 16 KB, exit code: 1, checker exit code: 0, verdict: RUNTIME_ERROR Input 2 4 Checker Log Exit code is 1

Also what does run time error mean?