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Datatähti 2017 loppu

Start:2017-01-19 12:15:00
End:2017-01-19 17:15:00
 

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CSES - Datatähti 2017 loppu - Results
History
2017-01-19 13:15:16100
2017-01-19 13:12:510
Task:Tunnelit
Sender:Pohjantahti
Submission time:2017-01-19 13:15:16
Language:C++
Status:READY
Score:100

Feedback

groupverdictscore
#1ACCEPTED16
#2ACCEPTED31
#3ACCEPTED53

Test results

testverdicttime (s)group
#1ACCEPTED0.06 / 1.001details
#2ACCEPTED0.06 / 1.001details
#3ACCEPTED0.06 / 1.001details
#4ACCEPTED0.06 / 1.001details
#5ACCEPTED0.06 / 1.001details
#6ACCEPTED0.09 / 1.002details
#7ACCEPTED0.05 / 1.002details
#8ACCEPTED0.06 / 1.002details
#9ACCEPTED0.05 / 1.002details
#10ACCEPTED0.06 / 1.002details
#11ACCEPTED0.32 / 1.003details
#12ACCEPTED0.19 / 1.003details
#13ACCEPTED0.12 / 1.003details
#14ACCEPTED0.13 / 1.003details
#15ACCEPTED0.07 / 1.003details

Code

#include <iostream>
#include <unordered_set>
#include <vector>
#include <algorithm>

using namespace std;

int n, m;
unordered_set<int> g[100005];
vector<int> ts;
int v[100005];

int d = 0;
int st;

void topos(int s) {
    if (v[s]) return;
    v[s] = 1;
    for (int a : g[s]) {
        topos(a);
    }
    ts.push_back(s);
}

void es(int s) {
    if (g[s].size() != 0) {
        int nn = *(g[s].begin());
        es(nn);
        g[s].erase(nn);
    }
}

int main() {
    cin >> n >> m;
    for (int i = 0; i < m; ++i) {
        int a, b;
        cin >> a >> b;
        g[a].insert(b);
    }
    for (int i = 1; i <= n; ++i) topos(i);
    reverse(ts.begin(), ts.end());
    st = 0;
    
    while (true) {
        while (g[ts[st]].size() == 0) {
            st++;
            if (st > n) {
                cout << d << "\n";
                return 0;
            }
        }
        d++;
        es(ts[st]);
    }
    
    return 0;
}

Test details

Test 1

Group: 1

Verdict: ACCEPTED

input
10 20
4 5
6 4
5 1
5 9
...
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correct output
11

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user output
11

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Test 2

Group: 1

Verdict: ACCEPTED

input
10 10
7 3
5 2
9 7
1 5
...
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correct output
5

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user output
5

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Test 3

Group: 1

Verdict: ACCEPTED

input
10 5
5 7
3 8
5 8
3 7
...
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correct output
4

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user output
4

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Test 4

Group: 1

Verdict: ACCEPTED

input
10 4
9 1
6 8
7 1
5 7
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correct output
3

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user output
3

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Test 5

Group: 1

Verdict: ACCEPTED

input
10 2
10 6
2 1

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correct output
2

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user output
2

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Test 6

Group: 2

Verdict: ACCEPTED

input
100 200
24 40
25 6
36 93
92 90
...
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correct output
97

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user output
97

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Test 7

Group: 2

Verdict: ACCEPTED

input
100 100
98 37
91 37
60 92
46 27
...
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correct output
60

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user output
60

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Test 8

Group: 2

Verdict: ACCEPTED

input
100 50
74 95
53 72
69 85
14 13
...
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correct output
34

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user output
34

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Test 9

Group: 2

Verdict: ACCEPTED

input
100 40
28 76
10 81
13 52
46 83
...
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correct output
29

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user output
29

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Test 10

Group: 2

Verdict: ACCEPTED

input
100 20
27 35
72 92
56 4
64 80
...
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correct output
18

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user output
18

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Test 11

Group: 3

Verdict: ACCEPTED

input
100000 200000
89244 59358
22943 56710
63331 89437
56581 38400
...
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correct output
102510

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user output
102510

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Test 12

Group: 3

Verdict: ACCEPTED

input
100000 100000
21701 85599
61542 21474
38081 29362
46316 64038
...
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correct output
60593

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user output
60593

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Test 13

Group: 3

Verdict: ACCEPTED

input
100000 50000
86469 4833
16351 35505
59315 33011
95464 16985
...
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correct output
35933

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user output
35933

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Test 14

Group: 3

Verdict: ACCEPTED

input
100000 40000
5392 23534
63204 45619
74330 25925
59678 88427
...
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correct output
30074

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user output
30074

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Test 15

Group: 3

Verdict: ACCEPTED

input
100000 20000
80156 16531
71753 77661
7028 33389
17168 646
...
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correct output
16882

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user output
16882

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