Match time (estimated points):
T1: state pressure DP. n=19? ? ? Run for 5 seconds? ? ?
80 points
T2: n^2 preprocessing, splitting, no correct solution
40 points
T3: The devil is greedy, the line segment tree
scores 100 points (or 0 points)
T4：？？？
After the game:
T1: It’s Farmer John again
92 points, contour DP? ? ?
AC
T2: Will Gcd
40 points, inverse/Eulerian function, push formula
AC
T3:Tie
Obviously greedy, just my line segment tree
AC
T4: Like, add coins, collect, charge
Change the DP root and still explode the stack? ? ?
80 points
*T5:
75 points, space? ? ? time? ? ? ++Strong? ? ?
Summarize:
Big crack...(There are still too many deficiencies in mathematics, and I can't solve difficult problems)
Fourth, I have watered down everything that can be watered down.