plz any one provide a good implementation of Binary indexed Tree in 1D and 2D and the related problems .
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Very good implementation for 1D and 2D BIT can be found here. http://community.topcoder.com/tc?module=Static&d1=tutorials&d2=binaryIndexedTrees Some problems on BIT on SPOJ. http://problemclassifier.appspot.com/index.jsp?search=BIT&usr=