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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 16:11:16100
2017-01-19 14:03:2347
Task:Tunnelit
Sender:ankka22
Submission time:2017-01-19 16:11:16
Language:C++
Status:READY
Score:100

Feedback

groupverdictscore
#1ACCEPTED16
#2ACCEPTED31
#3ACCEPTED53

Test results

testverdicttime (s)group
#1ACCEPTED0.07 / 1.001details
#2ACCEPTED0.05 / 1.001details
#3ACCEPTED0.06 / 1.001details
#4ACCEPTED0.07 / 1.001details
#5ACCEPTED0.06 / 1.001details
#6ACCEPTED0.06 / 1.002details
#7ACCEPTED0.06 / 1.002details
#8ACCEPTED0.05 / 1.002details
#9ACCEPTED0.07 / 1.002details
#10ACCEPTED0.05 / 1.002details
#11ACCEPTED0.33 / 1.003details
#12ACCEPTED0.18 / 1.003details
#13ACCEPTED0.11 / 1.003details
#14ACCEPTED0.12 / 1.003details
#15ACCEPTED0.08 / 1.003details

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
...
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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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