#775153 (PyPy3) No.1995 CHIKA Road

• 問題: No.1995 CHIKA Road
• ユーザー: ygd.
• 提出日時: 2022-07-01 22:10:57
• 言語: PyPy3 (7.3.15)
• 結果: AC
• 実行時間: 552 ms / 2,000 ms
• コード長: 2,734 bytes
• コンパイル時間: 420 ms
• コンパイル使用メモリ: 82,392 KB
• 実行使用メモリ: 171,256 KB
• 最終ジャッジ日時: 2024-11-26 05:20:40
• 合計ジャッジ時間: 11,780 ms
• ジャッジサーバーID （参考情報）: judge2 / judge3

ファイルパターン	結果
sample	AC * 3
other	AC * 37

ソースコード

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
import sys
#input = sys.stdin.readline
#input = sys.stdin.buffer.readline #文字列はダメ
#sys.setrecursionlimit(1000000)
#import bisect
#import itertools
#import random
#from heapq import heapify, heappop, heappush
#from collections import defaultdict 
#from collections import deque
#import copy
#import math
#from functools import lru_cache
#@lru_cache(maxsize=None)
#MOD = pow(10,9) + 7
#MOD = 998244353
#dx = [1,0,-1,0]
#dy = [0,1,0,-1]
#dx8 = [1,1,0,-1,-1,-1,0,1]
#dy8 = [0,1,1,1,0,-1,-1,-1]
#和のセグ木にするときは以下の関数を定義する必要あり。
def segfunc(x,y):
  return x+y
class SegmentTree(object):
    def __init__(self, A, dot, unit):
        n = 1 << (len(A) - 1).bit_length()
        tree = [unit] * (2 * n)
        for i, v in enumerate(A):
            tree[i + n] = v
        for i in range(n - 1, 0, -1):
            tree[i] = dot(tree[i << 1], tree[i << 1 | 1])
        self._n = n
        self._tree = tree
        self._dot = dot
        self._unit = unit
    def __getitem__(self, i):
        return self._tree[i + self._n]
    def update(self, i, v):
        i += self._n
        self._tree[i] = v
        while i != 1:
            i >>= 1
            self._tree[i] = self._dot(self._tree[i << 1], self._tree[i << 1 | 1])
    def add(self, i, v):
        self.update(i, self[i] + v)
    def sum(self, l, r): #これで[l,r)から取り出す。
        l += self._n
        r += self._n
        l_val = r_val = self._unit
        while l < r:
            if l & 1:
                l_val = self._dot(l_val, self._tree[l])
                l += 1
            if r & 1:
                r -= 1
                r_val = self._dot(self._tree[r], r_val)
            l >>= 1
            r >>= 1
        return self._dot(l_val, r_val)
def compress(S):
    S = set(S); S = list(S)
    S.sort()
    dic_comp_ori = {}
    dic_ori_comp = {}
    for i,a in enumerate(S):
        dic_ori_comp[a] = i
        dic_comp_ori[i] = a
    return dic_comp_ori, dic_ori_comp 
def main():
    N,M = map(int,input().split()); INF = pow(10,18)
    roads = []
    S = set([])
    for _ in range(M):
        A,B = map(int,input().split())
        S.add(A)
        S.add(B)
        roads.append((A,B))
    dic_comp_ori, dic_ori_comp = compress(S)
    for i,road in enumerate(roads):
        a = dic_ori_comp[road[0]]
        b = dic_ori_comp[road[1]]
        roads[i] = (a,b)
    oriN = N
    N = len(dic_ori_comp)
    roads.sort(key=lambda x: x[1])
    #print(roads)
    
    Tree = SegmentTree([0]*N,max,0)
    for s,t in roads:
        v = Tree.sum(0,s+1) + 1 #[0,s]
        Tree.update(t, max(Tree[t],v))
    
    ans = (oriN-1)*2 - Tree.sum(0,N)
    print(ans)
if __name__ == '__main__':
    main()
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX