Not sure if the only test case passed is by luck or something

#1

i think i had done some blunder in this code, please tell if this approach is correct or not
and tell me where it can be wrong

#2
#3

hi @sy7176442_ca8a8991a7ddc322,
the blunder is u r using int hehe :joy:
the code is good just use long long everywhere

#4

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