#898433 (PyPy3) No.2403 "Eight" Bridges of Königsberg

• 問題: No.2403 "Eight" Bridges of Königsberg
• ユーザー: Akijin_007
• 提出日時: 2023-08-04 22:05:36
• 言語: PyPy3 (7.3.15)
• 結果: AC
• 実行時間: 259 ms / 2,000 ms
• コード長: 1,930 bytes
• コンパイル時間: 161 ms
• コンパイル使用メモリ: 82,176 KB
• 実行使用メモリ: 102,544 KB
• 最終ジャッジ日時: 2024-11-26 17:47:53
• 合計ジャッジ時間: 5,252 ms
• ジャッジサーバーID （参考情報）: judge5 / judge4

ファイルパターン	結果
sample	AC * 4
other	AC * 31

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
#int(input())
#map(int, input().split())
#list(map(int, input().split()))
import sys
sys.setrecursionlimit(200000)
class UnionFind():
    def __init__(self, n):
        self.n = n
        self.parents = [-1] * n
    def find(self, x):
        if self.parents[x] < 0:
            return x
        else:
            self.parents[x] = self.find(self.parents[x])
            return self.parents[x]
    def union(self, x, y):
        x = self.find(x)
        y = self.find(y)
        if x == y:
            return
        if self.parents[x] > self.parents[y]:
            x, y = y, x
        self.parents[x] += self.parents[y]
        self.parents[y] = x
    def size(self, x):
        return -self.parents[self.find(x)]
    def same(self, x, y):
        return self.find(x) == self.find(y)
    def members(self, x):
        root = self.find(x)
        return [i for i in range(self.n) if self.find(i) == root]
    def roots(self):
        return [i for i, x in enumerate(self.parents) if x < 0]
    def group_count(self):
        return len(self.roots())
    def all_group_members(self):
        return {r: self.members(r) for r in self.roots()}
    def __str__(self):
        return '\n'.join('{}: {}'.format(r, self.members(r)) for r in self.roots())
N, M = map(int, input().split())
din = [0] * N
dout = [0] * N
u = UnionFind(N)
for i in range(M):
    w, v = map(int, input().split())
    din[w-1] += 1
    dout[v-1] += 1
    u.union(v-1, w-1)
d = dict()
for i in range(N):
    t = u.find(i)
    if t not in d:
        d[t] = min(abs(din[i] - dout[i]), 1)
    else:
        d[t] += min(abs(din[i] - dout[i]), 1)
# print(din)
# print(dout)
cnt = 0
f = 0
for k, x in d.items():
    if din[k] == 0 and dout[k] == 0:
        continue
    if x == 0:
        cnt += 1
    else:
        f = 1
if f == 0:
    print(cnt-1)
    exit()
e = 0
for i in range(N):
    e += max(0, din[i]-dout[i])
print(max(0, e+cnt-1))
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX