PivotOJ

Paired Up

시간 제한: 2000ms메모리 제한: 1024MB출처: USACO 2021 December PlatinumBOJ 23870

문제

There are a total of NN (1N50001\le N\le 5000) cows on the number line, each of which is a Holstein or a Guernsey. The breed of the ii-th cow is given by bi{H,G}b_i\in \{H,G\}, the location of the ii-th cow is given by xix_i (0xi1090 \leq x_i \leq 10^9), and the weight of the ii-th cow is given by yiy_i (1yi1051 \leq y_i \leq 10^5).

At Farmer John's signal, some of the cows will form pairs such that

  • Every pair consists of a Holstein hh and a Guernsey gg whose locations are within KK of each other (1K1091\le K\le 10^9); that is, xhxgK|x_h-x_g|\le K.
  • Every cow is either part of a single pair or not part of a pair.
  • The pairing is maximal; that is, no two unpaired cows can form a pair.

It's up to you to determine the range of possible sums of weights of the unpaired cows. Specifically,

  • If T=1T=1, compute the minimum possible sum of weights of the unpaired cows.
  • If T=2T=2, compute the maximum possible sum of weights of the unpaired cows.

입력

The first input line contains TT, NN, and KK.

Following this are NN lines, the ii-th of which contains bi,xi,yib_i,x_i,y_i. It is guaranteed that 0x1<x2<<xN1090\le x_1< x_2< \cdots< x_N\le 10^9.

출력

The minimum or maximum possible sum of weights of the unpaired cows.

예제

예제 1

입력
2 5 4
G 1 1
H 3 4
G 4 2
H 6 6
H 8 9
출력
16

예제 2

입력
1 5 4
G 1 1
H 3 4
G 4 2
H 6 6
H 8 9
출력
6

예제 3

입력
2 10 76
H 1 18
H 18 465
H 25 278
H 30 291
H 36 202
G 45 96
G 60 375
G 93 941
G 96 870
G 98 540
출력
1893
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