Lack of this examination is probably the calm steady.
(Playing time also)
With the mind deduction, estimated. To consider what to do next. Have a general plan.
T1: Card Chang: loop unrolling.
26 segment tree need not be labeled as a linked list, which pay more one-dimensional arrays [26] on the line.
Another: After the tree line to fight array. Structure slowly.
T1: rows of barrels, made similar questions. (I did not do, do not want to grasp the ideological)
T2: God DP,
Routine: If every column of the matrix problem can be turned into a maximum of a number sequence.
T3: Routine: XOR -> lexicographically.
Breakthrough lies in the formula.
Did not take the 40 points: n, m writing reversed.
Check the variable name.
Playing time to ascertain the variable name.
Risks and benefits planning:
The simplest one question can be considered up Think hit.
Acquire part of the problem points, the end of the public part of the reinsurance division.
I want to go further.
Robust shake difference hemp.