CSES - Datatähti Open 2017 - Results
Submission details
Task:Tunnels
Sender:cuber2460
Submission time:2017-01-21 18:29:47 +0200
Language:C++
Status:READY
Result:0
Feedback
groupverdictscore
#10
#20
#30
Test results
testverdicttimegroup
#1ACCEPTED0.04 s1details
#20.04 s1details
#30.05 s1details
#40.04 s1details
#50.03 s1details
#60.03 s2details
#70.05 s2details
#80.04 s2details
#90.03 s2details
#100.04 s2details
#110.15 s3details
#120.11 s3details
#130.09 s3details
#140.07 s3details
#150.06 s3details

Code

#include <iostream>
#include <set>
#include <algorithm>
using namespace std;

const int N = 100000;
vector <int> G[N + 7];
int odw[N + 7];
int d[N + 7];
int n, m;
int wynik = 0;
int nwyn;

void dfs(int v) {
	odw[v] = 1;
	nwyn += max(d[v], 0);
	for(auto u : G[v]) {
		if(!odw[u]) {
			dfs(u);
		}
	}
}

int main() {
	ios_base::sync_with_stdio(0);
	cin >> n >> m;
	for(int i = 0; i < m; ++i) {
		int a, b;
		cin >> a >> b;
		d[a]++;
		d[b]--;
		G[a].push_back(b);
		G[b].push_back(a);
	}
	
	for(int i = 1; i <= n; ++i) {
		if(!odw[i]) {
			nwyn = 0;
			dfs(i);
			if(nwyn == 0) nwyn++;
			wynik += nwyn;
		}
	}
	cout << wynik << endl;
	return 0;
}

Test details

Test 1

Group: 1

Verdict: ACCEPTED

input
10 20
4 5
6 4
5 1
5 9
...

correct output
11

user output
11

Test 2

Group: 1

Verdict:

input
10 10
7 3
5 2
9 7
1 5
...

correct output
5

user output
6

Test 3

Group: 1

Verdict:

input
10 5
5 7
3 8
5 8
3 7
...

correct output
4

user output
9

Test 4

Group: 1

Verdict:

input
10 4
9 1
6 8
7 1
5 7

correct output
3

user output
7

Test 5

Group: 1

Verdict:

input
10 2
10 6
2 1

correct output
2

user output
8

Test 6

Group: 2

Verdict:

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

correct output
97

user output
102

Test 7

Group: 2

Verdict:

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

correct output
60

user output
73

Test 8

Group: 2

Verdict:

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

correct output
34

user output
76

Test 9

Group: 2

Verdict:

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

correct output
29

user output
79

Test 10

Group: 2

Verdict:

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

correct output
18

user output
81

Test 11

Group: 3

Verdict:

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

correct output
102510

user output
107130

Test 12

Group: 3

Verdict:

input
100000 100000
21701 85599
61542 21474
38081 29362
46316 64038
...

correct output
60593

user output
79082

Test 13

Group: 3

Verdict:

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

correct output
35933

user output
76382

Test 14

Group: 3

Verdict:

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

correct output
30074

user output
77922

Test 15

Group: 3

Verdict:

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

correct output
16882

user output
85037