Discussion @ 1330. Intervals @ Timus Online Judge

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Discussion of Problem 1330. Intervals

Time Limit on #20 again.

Posted by Lampabash 21 Feb 2006 17:36

I understand that i am using bad algo.
Please show the way to write good algo.
Thanks

Re: Time Limit on #20 again.

Posted by tarakan 21 Feb 2006 20:05

Easy. Calculate the sum quickly using a[j]-a[i-1] where a[i] is sum of all elements from 1 to i.