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QOJ

ID题目提交者结果用时内存语言文件大小提交时间测评时间
#100249#6354. 4HEltim7RE 6ms5900kbC++231.5kb2023-04-25 10:29:412023-04-25 10:29:44

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-04-25 10:29:44]
  • 评测
  • 测评结果:RE
  • 用时:6ms
  • 内存:5900kb
  • [2023-04-25 10:29:41]
  • 提交

answer

#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <tuple>
#include <vector>
using namespace std;

#define endl '\n'
using LL=long long;
constexpr int N=1e5+10,M=320;
vector<int> adj[N];
bitset<M> bs[N];
int deg[N],mp[N];

void solve() {
    int n,m;
    cin>>n>>m;
    vector<pair<int,int>> edg;
    for(int i=1;i<=m;i++) {
        int u,v;
        cin>>u>>v;
        deg[u]++,deg[v]++;
        edg.emplace_back(u,v);
    }
    
    for(auto [u,v]:edg) {
        if(deg[u]<deg[v]+(u<v)) adj[u].push_back(v);
        else adj[v].push_back(u);
    }
    for(int i=1;i<=n;i++) sort(adj[i].begin(),adj[i].end());

    LL ans=0;
    for(int u=1;u<=n;u++) {
        edg.clear();
        for(int idx=0; int v:adj[u]) mp[v]=idx++;
        for(int v:adj[u]) {
            bs[v].reset();
            int i=0,j=0;
            while(i<adj[u].size()&&j<adj[v].size()) {
                if(adj[u][i]==adj[v][j]) {
                    edg.emplace_back(v,adj[v][j]);
                    bs[v].set(mp[adj[v][j]]);
                    i++,j++;
                }
                else if(adj[u][i]<adj[v][j]) i++;
                else j++;
            }
        }
        for(auto [v,w]:edg) ans+=(bs[v]&bs[w]).count();
    }

    cout<<ans;
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(nullptr);
    solve();
    return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 2ms
memory: 5748kb

input:

5 9
1 2
1 3
1 4
1 5
2 3
2 4
2 5
3 4
3 5

output:

2

result:

ok 1 number(s): "2"

Test #2:

score: 0
Accepted
time: 1ms
memory: 5764kb

input:

4 0

output:

0

result:

ok 1 number(s): "0"

Test #3:

score: 0
Accepted
time: 3ms
memory: 5732kb

input:

50 50
28 35
12 24
31 50
10 24
21 44
5 31
23 36
31 45
6 39
4 8
13 37
42 48
17 45
19 33
12 21
19 32
16 43
12 47
25 31
40 48
8 49
43 48
6 42
27 34
13 39
17 40
13 35
3 49
20 24
5 12
43 44
15 37
24 27
8 43
4 22
17 38
28 47
29 46
3 15
9 49
1 41
43 45
3 6
37 48
13 30
11 43
8 25
33 38
16 32
32 41

output:

0

result:

ok 1 number(s): "0"

Test #4:

score: 0
Accepted
time: 1ms
memory: 5900kb

input:

100 4900
64 78
3 13
93 96
48 64
34 64
5 76
66 74
44 78
17 20
30 73
5 34
24 100
23 65
4 70
22 95
47 70
6 89
15 70
70 82
88 90
29 80
27 64
16 59
28 99
67 68
85 99
37 85
8 46
71 78
40 95
6 21
27 66
16 89
11 83
17 57
19 36
21 70
27 86
27 45
5 56
10 64
23 33
87 91
37 40
21 55
75 79
54 96
3 77
70 78
36 93...

output:

3689634

result:

ok 1 number(s): "3689634"

Test #5:

score: 0
Accepted
time: 6ms
memory: 5764kb

input:

100 4000
73 78
38 98
9 65
43 72
20 47
6 37
49 60
48 87
48 77
23 100
57 59
42 99
40 88
20 96
19 44
35 80
12 93
34 44
63 75
3 49
32 99
47 61
3 13
54 81
55 96
16 74
28 77
43 45
25 92
5 82
3 83
9 55
64 78
39 89
19 64
58 75
1 18
22 76
16 55
18 60
14 55
29 96
37 97
26 97
11 53
24 79
7 35
53 54
31 74
31 32...

output:

1094294

result:

ok 1 number(s): "1094294"

Test #6:

score: -100
Dangerous Syscalls

input:

447 99681
346 391
18 307
271 438
50 436
84 215
64 104
291 325
278 355
152 228
7 117
174 410
61 386
7 204
264 327
366 409
291 405
42 131
89 203
1 175
229 292
225 320
1 310
89 185
161 340
401 406
265 377
119 313
253 403
190 383
305 367
334 424
88 327
77 357
25 334
56 62
68 245
1 13
290 336
94 354
10 3...

output:


result: