fractal161's Qualifier
Player:
Event:
Tournament:
Status:
Approved
Score 1:
1,619,340
Score 2:
1,593,840
Total score:
1,606,590
Details:
Farmer John owns a long farm along the highway that can be considered somewhat like a one-dimensional number line. Along the farm, there are K grassy patches (1≤K≤2⋅105); the i-th patch is located at position pi and has an associated tastiness value ti (0≤ti≤109). Farmer John's nemesis, Farmer Nhoj, has already situated his M cows (1≤M≤2⋅105) at locations f1…fM. All K+M of these locations are distinct integers in the range [0,109].
Farmer John needs to pick N
(1≤N≤2⋅105
) locations (not necessarily integers) for his cows to be located. These must be distinct from those already occupied by the cows of Farmer Nhoj, but it is possible for Farmer John to place his cows at the same locations as grassy patches.
Whichever farmer owns a cow closest to a grassy patch can claim ownership of that patch. If there are two cows from rival farmers equally close to the patch, then Farmer Nhoj claims the patch.
Given the locations of Farmer Nhoj's cows and the locations and tastiness values of the grassy patches, determine the maximum total tastiness Farmer John's cows can claim if optimally positioned.