Some problem about powerful data structure and algorithm SQRT decomposition.
If you want to learn this algorithm click here.
And a big thank to mr_agha_seyed for helping.
220B - Little Elephant and Array
86D - Powerful array
13E - Holes
455D - Serega and Fun
375D - Tree and Queries
446C - DZY Loves Fibonacci Numbers
487D - Conveyor Belts
506D - Mr. Kitayuta's Colorful Graph
348C - Subset Sums
617E - XOR and Favorite Number
444C - DZY Loves Colors
398D - Instant Messanger
342E - Xenia and Tree
Maybe some of them can solve by other data structures like segment tree.