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SWAPMATR- Editorial general factorization , easy , hump2015 , prefix-sum , 2d	1	1404	November 15, 2017
Unique elements in 2D vector general 2d , vector	5	664	August 10, 2017
Some way to handle 2d matrix of high order general 2d , memory , heap , array	6	998	January 3, 2016
DISTNUM - Editorial editorial aug15 , fenwick-tree , super-hard , editorial , segment-tree , 2d , sqrt-decomp , range-tree	4	8359	September 2, 2015
Logic needed with explanation. general matrix , pattern , 2d	12	1113	December 28, 2013
how to input a 2d matrix using getchar_unlocked general input , fast , 2d	10	5571	September 9, 2013

2d