at 05:50 mins
sir, why we have to take the first element of the array out side of the loop ?
and do this cumsum[0]=a[0];
cant we just run our loop from 0 itself to <n ?
like this
for(int i=0;i<n;i++)
{
cin>>a[i];
cumsum[i] = cumsum[i - 1] + a[i];
}
hello @heyiamtushar
if we do like this then when i=0 at that time i-1 will be -1, and negative index access in not allowed.
so to avoid it we have handled that case seprately by doing this ->
sir, please check my code. with input 1,2,3,4,5 output is coming 14 https://ide.codingblocks.com/s/465136
check now->
but sir if i am using the input from the video the output is correct, only if i am using 1,2,3,4,5 the output is incorrect.
see u r accessing negative index, and value can be anything at negative value which might affect the result , so its better to avoid negative 8ndex case by handling it explicitly
okay, thank you so much !!
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