CSES - Datatähti 2017 loppu - Results
Submission details
Task:Tunnelit
Sender:ankka22
Submission time:2017-01-19 16:11:16 +0200
Language:C++
Status:READY
Result:100
Feedback
groupverdictscore
#1ACCEPTED16
#2ACCEPTED31
#3ACCEPTED53
Test results
testverdicttimegroup
#1ACCEPTED0.07 s1details
#2ACCEPTED0.05 s1details
#3ACCEPTED0.06 s1details
#4ACCEPTED0.07 s1details
#5ACCEPTED0.06 s1details
#6ACCEPTED0.06 s2details
#7ACCEPTED0.06 s2details
#8ACCEPTED0.05 s2details
#9ACCEPTED0.07 s2details
#10ACCEPTED0.05 s2details
#11ACCEPTED0.33 s3details
#12ACCEPTED0.18 s3details
#13ACCEPTED0.11 s3details
#14ACCEPTED0.12 s3details
#15ACCEPTED0.08 s3details

Code

#include <iostream>
#include <vector>
#include <queue>
#include <algorithm>
#include <unordered_set>
#define ll long long
using namespace std;
int n, k, o,m, p, r, a[101010], b[101010], c[1010][1010], z[101010];
vector<int> v[101010];
vector<pair<int,int>> lh;
queue<int> q;
unordered_set<int> ses[101010];
vector<int> w;
void haku2(int s) {
	//cout << "haussa << " << s << endl;
	for (auto u: v[s]) {
		if (ses[s].find(u) != ses[s].end()) continue;
		//c[s][u] = 1;
		ses[s].insert(u);
		a[u]--;
		b[s]--;
		haku2(u);
		break;
	}
}
void haku1(int s) {
	if (z[s]) return;
	z[s] = 1;
	for (auto u: v[s]) {
		haku1(u);
	}
	w.push_back(s);
}
int main() {
	cin >> n >> m;
	for (int i = 0; i < m; i++) {
		cin >> o >> p;
		a[o]++;
		b[p]++;
		v[o].push_back(p);
	}
	for (int i = 1; i <= n; i++) {
		haku1(i);
	}
	reverse(w.begin(), w.end());
	//cout << "koko" << w.size() << endl;
	for (auto u: w) {
		//cout << u << "lähtee tästä"<<  endl;
		while (a[u] > 0) {
			//cout << u << endl;
			haku2(u);
			r++;
			a[u]--;
		}
	}
	cout << r << endl;
}

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: ACCEPTED

input
10 10
7 3
5 2
9 7
1 5
...

correct output
5

user output
5

Test 3

Group: 1

Verdict: ACCEPTED

input
10 5
5 7
3 8
5 8
3 7
...

correct output
4

user output
4

Test 4

Group: 1

Verdict: ACCEPTED

input
10 4
9 1
6 8
7 1
5 7

correct output
3

user output
3

Test 5

Group: 1

Verdict: ACCEPTED

input
10 2
10 6
2 1

correct output
2

user output
2

Test 6

Group: 2

Verdict: ACCEPTED

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

correct output
97

user output
97

Test 7

Group: 2

Verdict: ACCEPTED

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

correct output
60

user output
60

Test 8

Group: 2

Verdict: ACCEPTED

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

correct output
34

user output
34

Test 9

Group: 2

Verdict: ACCEPTED

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

correct output
29

user output
29

Test 10

Group: 2

Verdict: ACCEPTED

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

correct output
18

user output
18

Test 11

Group: 3

Verdict: ACCEPTED

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

correct output
102510

user output
102510

Test 12

Group: 3

Verdict: ACCEPTED

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

correct output
60593

user output
60593

Test 13

Group: 3

Verdict: ACCEPTED

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

correct output
35933

user output
35933

Test 14

Group: 3

Verdict: ACCEPTED

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

correct output
30074

user output
30074

Test 15

Group: 3

Verdict: ACCEPTED

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

correct output
16882

user output
16882