But isn’t in the last test case

6 12
4 5
1 6
12 5
5 5
9 7
8 3

On point with x 9, rain value will be 12, which is not more than 12, but removing this point will remove flooding, as answer is

100110

I found out how to build the "chart", but could not find a condition for each point...

Clarification on A was so unfair, for people, who already failed on this case, and got minus points

Pls, somebody explain, how my solution http://mirror.codeforces.com/contest/977/submission/37965169 for Problem F was hacked. But when i changed "unordered_map" to "map" it got accepted. It seems realy strange to me