CSES - Datatähti 2018 loppu - Results
Submission details
Task:Tietoverkko
Sender:valokoodari
Submission time:2018-01-19 09:40:02 +0200
Language:C++
Status:READY
Result:0
Feedback
groupverdictscore
#10
#20
Test results
testverdicttimegroup
#10.05 s1details
#20.05 s1details
#30.04 s1details
#40.05 s1details
#5ACCEPTED0.04 s1details
#60.37 s2details
#70.51 s2details
#80.40 s2details
#90.38 s2details
#100.35 s2details

Code

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

int main() {
	int n;
	cin >> n;

	vector<vector<int>> c(n, vector<int> (n, 0));
	vector<int> d(n, 0);
	for (int i = 0; i < n; i++) {
		int a,b;
		cin >> a >> b;
		a--;
		b--;
		c[a][d[a]++] = b;
		c[b][d[b]++] = a;
	}
/* Debug
	for (int i = 0; i < n; i++)
		cout << d[i] << " ";
	cout << endl;
*/
	int k = 0;
	for (int i = 0; i < n; i++)
		if (d[i] == 1) {
			k++;
			int a = i;
			int b = c[a][0];
			while (d[b] == 2) {
				k++;
				if (a == c[b][0]) {
					a = b;
					b = c[a][1];
				} else {
					a = b;
					b = c[a][0];
				}
			}
		}

	cout << k << endl;
		
	return 0;
}

Test details

Test 1

Group: 1

Verdict:

input
100
16 88
6 77
60 92
98 64
...

correct output
97

user output
67

Test 2

Group: 1

Verdict:

input
100
97 41
95 93
79 60
5 4
...

correct output
95

user output
68

Test 3

Group: 1

Verdict:

input
100
87 24
21 49
86 85
42 32
...

correct output
90

user output
69

Test 4

Group: 1

Verdict:

input
100
30 24
54 79
51 6
80 29
...

correct output
50

user output
46

Test 5

Group: 1

Verdict: ACCEPTED

input
100
11 27
54 59
100 90
2 95
...

correct output
0

user output
0

Test 6

Group: 2

Verdict:

input
100000
98276 76171
70684 49183
48756 661
17166 16972
...

correct output
99997

user output
(empty)

Test 7

Group: 2

Verdict:

input
100000
35903 47275
13566 84
58018 42495
57071 4451
...

correct output
99995

user output
(empty)

Test 8

Group: 2

Verdict:

input
100000
79209 94485
60266 86793
27501 19927
13544 59730
...

correct output
99000

user output
(empty)

Test 9

Group: 2

Verdict:

input
100000
68402 82703
12892 46068
60013 40753
26168 34434
...

correct output
90000

user output
(empty)

Test 10

Group: 2

Verdict:

input
100000
37330 74855
54324 45726
61652 15611
79081 47339
...

correct output
0

user output
(empty)