8shubham's blog

Getting SIGFPE Runtime Error
By 8shubham, history, 8 years ago, In English

While solving this question on spoj when I am declaring array as long long I am getting SIGFPE Runtime error and as soon as I change it to int, it is getting accepted.

Error Code

ACed Code

I am unable to understand why this is happening because SIGFPE error occurs when we divide by zero.

Can anyone help on it ?

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8 years ago, # |
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the size of your fact array is too small, increasing it and computing the right value would make it AC. The UB bug occurs as count[i]>>1 can be greater than 25.

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    8 years ago, # ^ |
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    But see my ACed solution I have changed nothing just the cnt array from ll to int and everything seems to be working fine. I am not able to understand. How the array type can lead to SIGFPE error ?

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      8 years ago, # ^ |
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      well, I think the UB bug coincidentally get you AC. I am not sure as I don't have access to the inputs. But your AC code is definitely not correct as it does not count 25! and above correctly

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        8 years ago, # ^ |
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        Ok.. This might be the case as I was continuously getting this error so I referred to CODE to verify my ans.(He has also done the same thing)

        You are correct this is not the right method. BTW thanks !!

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