https://codeforces.com/contest/1265/submission/68128052
Can anyone explain why this code is giving WA on test 6 and how do I correct it ? Thanks in advance.
https://codeforces.com/contest/1265/submission/68128052
Can anyone explain why this code is giving WA on test 6 and how do I correct it ? Thanks in advance.
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Overflow is the cause. In the below line
i*(i-1)*1llAs the expression is processed from left to right,
i*(i-1)is stored in to 'int' first and only then it is multiplied by1ll. So do1ll*i*(i-1)to rectify it.Thank you so much !!