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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#736359#8593. CoinShadowShark32 418ms12476kbC++141.3kb2024-11-12 10:23:472024-11-12 10:23:49

Judging History

你现在查看的是最新测评结果

  • [2024-11-12 10:23:49]
  • 评测
  • 测评结果:32
  • 用时:418ms
  • 内存:12476kb
  • [2024-11-12 10:23:47]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;

const int maxN = 2e5 + 5;
bool visited[maxN];
int x[4 * maxN], y[4 * maxN];
vector<pair<int, int>> adj[maxN];

void dfs(int u, int tick, int type) {
    visited[u] = true;
    for (auto it: adj[u]) {
        int v = it.first, w = it.second;
        if (visited[v] || type * w < 0 || abs(w) > tick) continue;
        dfs(v, tick, type);
    }
}

int main() {
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    int n, m;
    cin >> n >> m;

    for (int i = 1; i <= m; i++) {
        cin >> x[i] >> y[i];
        adj[x[i]].push_back({y[i], i});
        adj[y[i]].push_back({x[i], -i});
    }

    if (n == 1) {
        cout << 0;
        return 0;
    }

    for (int u = 1; u <= n; u++) {
        int low = 1, high = m, ans = -1;
        while (low <= high) {
            int mid = (low + high) >> 1;

            dfs(u, mid, -1);
            dfs(u, mid, 1);

            int cnt = 0;
            for (int v = 1; v <= n; v++) {
                cnt += visited[v];
                visited[v] = false;
            }

            if (cnt == n) {
                ans = mid;
                high = mid - 1;
            }
            else low = mid + 1;
        }
        cout << ans << ' ';
    }

    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 6
Accepted

Test #1:

score: 6
Accepted
time: 0ms
memory: 11420kb

input:

4 4
2 4
3 1
4 1
2 3

output:

3 4 -1 -1 

result:

ok ac

Test #2:

score: 6
Accepted
time: 3ms
memory: 11236kb

input:

6 8
1 5
5 4
6 2
2 5
4 3
6 1
6 5
2 1

output:

8 8 5 5 5 6 

result:

ok ac

Test #3:

score: 6
Accepted
time: 2ms
memory: 12404kb

input:

2 1
1 2

output:

1 1 

result:

ok ac

Test #4:

score: 6
Accepted
time: 0ms
memory: 11128kb

input:

6 12
1 5
5 4
6 2
2 5
4 3
6 5
1 5
1 5
2 4
6 3
1 3
4 3

output:

-1 -1 5 5 5 -1 

result:

ok ac

Test #5:

score: 6
Accepted
time: 2ms
memory: 11772kb

input:

7 20
1 6
6 3
1 4
1 5
1 7
1 2
1 5
2 3
4 5
7 2
2 4
5 3
6 3
1 3
4 3
7 5
2 6
4 6
7 2
7 5

output:

6 17 12 18 -1 -1 17 

result:

ok ac

Test #6:

score: 6
Accepted
time: 2ms
memory: 12360kb

input:

7 20
5 6
1 3
3 6
4 1
7 4
2 5
4 3
2 6
7 5
4 6
2 6
2 1
4 5
1 3
1 5
7 1
7 6
4 1
7 6
3 6

output:

15 -1 -1 -1 -1 6 -1 

result:

ok ac

Test #7:

score: 6
Accepted
time: 2ms
memory: 12476kb

input:

7 20
7 6
4 5
6 4
3 6
4 1
6 2
3 5
5 2
7 6
1 2
3 6
6 4
7 1
6 1
7 1
4 5
3 6
3 5
4 5
3 1

output:

-1 10 -1 8 -1 6 -1 

result:

ok ac

Subtask #2:

score: 16
Accepted

Dependency #1:

100%
Accepted

Test #8:

score: 16
Accepted
time: 0ms
memory: 11556kb

input:

20 100
5 20
4 5
18 16
1 13
14 9
11 19
6 4
7 20
16 11
8 13
4 5
16 9
12 14
7 12
11 3
9 11
9 11
13 6
3 10
12 9
13 4
20 12
13 6
18 11
5 7
5 7
15 18
12 15
17 13
15 18
3 2
11 2
11 2
15 19
4 19
14 19
14 9
17 3
1 18
8 10
16 19
1 6
7 2
5 12
1 18
8 20
5 18
8 5
4 16
1 15
5 19
18 19
17 10
1 10
17 3
10 2
3 10
17...

output:

-1 -1 -1 31 31 31 31 -1 31 -1 31 31 31 -1 71 -1 -1 -1 -1 31 

result:

ok ac

Test #9:

score: 16
Accepted
time: 3ms
memory: 11196kb

input:

100 400
87 45
42 17
9 81
65 10
8 82
76 48
39 73
21 58
76 30
76 92
74 76
99 90
38 50
86 74
75 52
8 2
80 55
20 95
66 60
78 82
10 18
22 59
23 17
63 76
56 51
38 10
50 65
41 28
64 77
59 53
100 66
38 84
23 47
17 9
45 75
41 28
33 41
8 78
2 95
3 11
40 15
60 63
23 17
82 2
61 44
44 16
77 34
100 66
96 99
68 12...

output:

-1 -1 187 -1 183 -1 -1 -1 183 -1 187 -1 -1 187 183 187 183 -1 -1 -1 -1 183 -1 183 -1 -1 183 183 -1 -1 -1 -1 187 187 -1 -1 187 183 183 183 -1 -1 183 187 183 188 -1 -1 -1 -1 183 -1 183 183 -1 -1 -1 -1 183 -1 187 -1 -1 187 -1 187 -1 -1 -1 -1 -1 -1 183 -1 183 187 187 -1 188 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1...

result:

ok ac

Subtask #3:

score: 10
Accepted

Dependency #1:

100%
Accepted

Dependency #2:

100%
Accepted

Test #10:

score: 10
Accepted
time: 418ms
memory: 11756kb

input:

1000 4000
619 298
211 477
584 418
812 280
978 268
280 345
715 364
73 664
915 819
535 28
110 959
384 663
773 315
792 250
374 80
134 202
779 416
613 334
318 756
21 812
424 997
664 277
151 963
299 438
955 988
532 653
521 43
121 20
902 849
237 305
272 893
325 792
469 549
891 531
612 810
294 256
188 990
...

output:

-1 1981 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1980 1981 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1980 1977 1981 -1 -1 -1 -1 1981 -1 -1 -1 -1 -1 -1 -1 1980 -1 -1 1981 1977 -1 -1 -1 -1 -1 -1 -1 -1 -1 1981 -1 -1 -1 -1 -1 -1 1981 -1 -1 -1 1981 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1977 -1 -1 -1 -1 -1...

result:

ok ac

Test #11:

score: 10
Accepted
time: 368ms
memory: 10628kb

input:

1000 4000
229 403
665 867
715 618
306 900
423 567
515 288
39 754
782 321
516 969
432 89
304 726
837 39
648 991
870 369
84 681
864 41
682 940
565 914
724 763
694 112
969 815
864 41
975 868
662 803
707 465
905 791
116 115
823 578
949 588
589 522
775 447
795 130
366 456
993 910
187 396
102 774
143 90
9...

output:

1976 -1 -1 1961 1976 1976 -1 -1 -1 -1 1973 -1 1961 -1 -1 1976 -1 -1 -1 1976 -1 -1 1961 -1 1976 1976 1961 1961 -1 1961 -1 -1 1961 -1 1976 -1 -1 -1 -1 -1 -1 -1 -1 1976 -1 -1 1973 -1 1976 -1 1961 -1 1976 -1 -1 -1 -1 -1 -1 -1 1976 -1 1976 1976 1976 -1 1976 1961 1976 -1 -1 -1 -1 -1 1973 -1 1976 -1 1976 1...

result:

ok ac

Test #12:

score: 10
Accepted
time: 330ms
memory: 11184kb

input:

1000 4000
693 317
927 745
607 353
336 456
182 240
100 824
252 317
88 828
436 714
833 621
533 704
63 735
522 518
900 283
135 829
627 459
601 176
876 806
573 140
380 898
870 795
990 876
943 148
500 462
808 486
920 463
794 7
531 181
60 105
497 875
859 469
997 575
706 838
296 194
453 793
310 673
771 307...

output:

1998 1998 -1 -1 -1 -1 1998 1998 -1 1998 -1 1998 1998 -1 1987 -1 1998 1998 -1 -1 -1 -1 -1 1998 1998 1998 -1 -1 -1 1998 -1 1998 -1 -1 -1 -1 1998 -1 1998 -1 1998 -1 1998 -1 -1 1998 1998 1998 1998 -1 1998 1998 1998 -1 1987 1998 -1 1998 1998 1998 -1 -1 1998 -1 -1 1998 -1 1998 1998 1998 1998 1998 -1 1987 ...

result:

ok ac

Subtask #4:

score: 0
Time Limit Exceeded

Dependency #1:

100%
Accepted

Dependency #2:

100%
Accepted

Dependency #3:

100%
Accepted

Test #13:

score: 0
Time Limit Exceeded

input:

10000 24156
6770 9800
71 3709
5373 2058
9145 5993
9973 456
1562 628
839 3483
9354 9169
7105 7062
4434 4044
2147 534
7337 1981
719 3853
8205 8198
1286 7343
246 4189
1324 8878
547 3468
2219 8650
7265 5823
6382 5720
6219 1258
8893 466
5615 9147
7763 7160
3652 6512
7594 7169
235 1287
6487 2049
6894 853
...

output:


result: