Discussion @ 1393. Average Common Prefix @ Timus Online Judge

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Discussion of Problem 1393. Average Common Prefix

WA 30……Help

Posted by grayluck 29 Sep 2011 11:40

I use suffix array to solve this problem...but i've WA 30 many times and don't know why.
Can someone give me some hint or tests ?

Re: WA 30……Help

Posted by IgorKoval(from Pskov) 12 Apr 2012 01:41

for var 'ans' use __int64 type.
and printf( "%.3lf\n", (ans+0.0)/(n-1) );