CSES - Datatähti 2020 loppu - Results
Submission details
Task:Kierrokset
Sender:Tuomas Nummela
Submission time:2020-02-09 16:05:48 +0200
Language:C++ (C++11)
Status:READY
Result:0
Feedback
groupverdictscore
#10
#20
#30
#40
Test results
testverdicttimegroup
#10.02 s1, 2, 4details
#20.02 s1, 4details
#30.02 s1, 4details
#40.02 s1, 4details
#50.02 s2, 4details
#60.02 s4details
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#140.08 s4details
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#160.08 s4details
#170.18 s2, 4details
#18--4details
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#23--4details
#24--4details
#25--2, 4details
#26--4details
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#28--4details
#29ACCEPTED0.02 s1, 2, 3, 4details
#30ACCEPTED0.02 s1, 2, 3, 4details
#31ACCEPTED0.02 s1, 2, 3, 4details
#32ACCEPTED0.02 s1, 2, 4details
#33ACCEPTED0.02 s1, 2, 3, 4details
#34ACCEPTED0.02 s1, 2, 4details
#35ACCEPTED0.02 s1, 2, 4details
#360.02 s1, 3, 4details
#370.02 s1, 4details
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#39ACCEPTED0.02 s1, 4details
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#440.02 s1, 4details
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#46ACCEPTED0.02 s1, 2, 4details
#470.02 s1, 2, 3, 4details
#480.02 s1, 2, 3, 4details
#49ACCEPTED0.02 s1, 2, 4details
#50ACCEPTED0.02 s1, 4details
#51ACCEPTED0.16 s2, 4details
#52--2, 3, 4details
#53--2, 3, 4details
#54--2, 3, 4details
#55--2, 4details
#56--2, 4details
#57--2, 4details
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#80--3, 4details
#81--3, 4details
#82--3, 4details
#83--2, 4details
#84--2, 4details
#850.02 s1, 2, 4details
#86ACCEPTED0.02 s1, 2, 4details

Compiler report

input/code.cpp: In function 'void haku(int, std::vector<int>)':
input/code.cpp:33:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(solmu == y && path.size() == lenMin){
                      ~~~~~~~~~~~~^~~~~~~~~
input/code.cpp:34:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i=0; i<path.size(); i++)path1.push_back(path[i]);
                      ~^~~~~~~~~~~~
input/code.cpp:42:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i=0; i<path.size(); i++)newPath.push_back(path[i]);
                      ~^~~~~~~~~~~~

Code

#include <bits/stdc++.h>

using namespace std;
int n, x, y,a,b;

long long ans=0;

long long MOD = pow(10,9)+7;

int lenMin = INT_MAX;

vector<int> path1;

vector<int> v[1010101];

int z[1010101];

void hakuLen(int solmu, int len){
    if(solmu == y){
        lenMin = min(lenMin, len);
    }
    if(z[solmu]) return;

    z[solmu]=1;

    for(auto s : v[solmu]){
        hakuLen(s,len+1);
    }
}

void haku(int solmu, vector<int> path){

    if(solmu == y && path.size() == lenMin){
        for(int i=0; i<path.size(); i++)path1.push_back(path[i]);
    }
    if(z[solmu]) return;

    z[solmu]=1;

    for(auto s : v[solmu]){
        vector<int> newPath;
        for(int i=0; i<path.size(); i++)newPath.push_back(path[i]);
        newPath.push_back(s);
        haku(s,newPath);
    }
}

int factorial(int n){
    if(n == 0) return 1;
    return n*factorial(n-1)%MOD;
}

int calc(int n, int r){

    return factorial(n)/(factorial(r)*factorial(n-r));
}

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

    for(int i=0; i<n-1; i++){
        cin>>a>>b;
        v[a].push_back(b);
        v[b].push_back(a);
    }

    hakuLen(x, 1);

    //haku(x,);
    lenMin--;



    int p = n-1-lenMin;

    for(int i=0; i<=p; i++){
        ans += calc(p, i)%MOD;
    }


    cout<<ans<<"\n";

    return 0;
}

Test details

Test 1

Group: 1, 2, 4

Verdict:

input
10 5 6
1 2
2 3
3 4
4 5
...

correct output
25

user output
256

Test 2

Group: 1, 4

Verdict:

input
10 8 1
10 7
7 3
8 7
10 9
...

correct output
36

user output
64

Test 3

Group: 1, 4

Verdict:

input
10 10 5
1 6
2 6
2 4
7 2
...

correct output
36

user output
64

Test 4

Group: 1, 4

Verdict:

input
10 7 9
9 6
9 1
1 8
9 2
...

correct output
48

user output
128

Test 5

Group: 2, 4

Verdict:

input
50 46 14
1 2
2 3
3 4
4 5
...

correct output
70

user output
2

Test 6

Group: 4

Verdict:

input
50 49 14
27 13
27 50
5 27
30 5
...

correct output
535291010

user output
2

Test 7

Group: 4

Verdict:

input
50 46 18
24 45
3 24
24 25
32 45
...

correct output
250065865

user output
6

Test 8

Group: 4

Verdict:

input
50 39 9
4 50
5 50
4 28
17 4
...

correct output
145500013

user output
30

Test 9

Group: 2, 4

Verdict:

input
250 166 226
1 2
2 3
3 4
4 5
...

correct output
4150

user output
-22

Test 10

Group: 4

Verdict:

input
250 104 224
118 137
189 118
127 189
132 189
...

correct output
230001327

user output
179

Test 11

Group: 4

Verdict:

input
250 20 113
100 108
220 108
220 228
62 108
...

correct output
734434924

user output
2

Test 12

Group: 4

Verdict:

input
250 116 21
221 16
221 223
22 16
16 79
...

correct output
273467702

user output
2

Test 13

Group: 2, 4

Verdict:

input
1250 556 801
1 2
2 3
3 4
4 5
...

correct output
250200

user output
46

Test 14

Group: 4

Verdict:

input
1250 1115 100
952 651
952 289
166 952
166 871
...

correct output
600544658

user output
548

Test 15

Group: 4

Verdict:

input
1250 657 79
13 420
13 346
13 287
1210 420
...

correct output
813695503

user output
2321

Test 16

Group: 4

Verdict:

input
1250 214 271
522 351
140 351
805 351
522 431
...

correct output
212897427

user output
9792

Test 17

Group: 2, 4

Verdict:

input
6250 4685 392
1 2
2 3
3 4
4 5
...

correct output
613872

user output
-1646

Test 18

Group: 4

Verdict:

input
6250 5270 5866
5282 4610
5282 1160
4610 1967
2502 5282
...

correct output
423709118

user output
(empty)

Test 19

Group: 4

Verdict:

input
6250 6162 514
4663 2181
6136 2181
6136 3161
3161 2803
...

correct output
949879698

user output
(empty)

Test 20

Group: 4

Verdict:

input
6250 1522 4950
1937 2721
4518 2721
1937 2231
1937 771
...

correct output
152101730

user output
(empty)

Test 21

Group: 2, 4

Verdict:

input
31250 28710 19769
1 2
2 3
3 4
4 5
...

correct output
50233029

user output
(empty)

Test 22

Group: 4

Verdict:

input
31250 27848 22747
16893 8747
18910 16893
30376 16893
23945 18910
...

correct output
522494382

user output
(empty)

Test 23

Group: 4

Verdict:

input
31250 6703 20415
23779 14085
23779 9341
14085 28511
14085 23151
...

correct output
615059214

user output
(empty)

Test 24

Group: 4

Verdict:

input
31250 26948 21755
344 12546
12546 11641
11641 1883
9152 12546
...

correct output
614062321

user output
(empty)

Test 25

Group: 2, 4

Verdict:

input
156250 71359 63141
1 2
2 3
3 4
4 5
...

correct output
360165737

user output
(empty)

Test 26

Group: 4

Verdict:

input
156250 132945 97315
139434 74332
121914 74332
31473 121914
20412 139434
...

correct output
901028288

user output
(empty)

Test 27

Group: 4

Verdict:

input
156250 85489 5733
140340 76749
140340 98734
76749 30645
76749 72109
...

correct output
38533849

user output
(empty)

Test 28

Group: 4

Verdict:

input
156250 143710 49348
65050 143666
143666 47977
143666 35254
47977 99013
...

correct output
615178214

user output
(empty)

Test 29

Group: 1, 2, 3, 4

Verdict: ACCEPTED

input
1 1 1

correct output
1

user output
1

Test 30

Group: 1, 2, 3, 4

Verdict: ACCEPTED

input
2 1 1
1 2

correct output
2

user output
2

Test 31

Group: 1, 2, 3, 4

Verdict: ACCEPTED

input
2 2 2
1 2

correct output
2

user output
2

Test 32

Group: 1, 2, 4

Verdict: ACCEPTED

input
2 1 2
1 2

correct output
1

user output
1

Test 33

Group: 1, 2, 3, 4

Verdict: ACCEPTED

input
3 2 2
1 2
2 3

correct output
4

user output
4

Test 34

Group: 1, 2, 4

Verdict: ACCEPTED

input
3 1 2
1 2
2 3

correct output
2

user output
2

Test 35

Group: 1, 2, 4

Verdict: ACCEPTED

input
3 1 3
1 2
2 3

correct output
1

user output
1

Test 36

Group: 1, 3, 4

Verdict:

input
10 4 4
1 2
1 3
3 4
1 5
...

correct output
99

user output
512

Test 37

Group: 1, 4

Verdict:

input
10 7 2
1 2
1 3
1 4
2 5
...

correct output
32

user output
64

Test 38

Group: 1, 4

Verdict:

input
10 2 4
1 2
1 3
1 4
2 5
...

correct output
72

user output
128

Test 39

Group: 1, 4

Verdict: ACCEPTED

input
10 4 8
1 2
2 3
3 4
2 5
...

correct output
32

user output
32

Test 40

Group: 1, 4

Verdict:

input
10 3 1
1 2
1 3
1 4
2 5
...

correct output
108

user output
256

Test 41

Group: 1, 4

Verdict:

input
10 7 8
1 2
2 3
2 4
3 5
...

correct output
15

user output
32

Test 42

Group: 1, 4

Verdict:

input
10 4 10
1 2
1 3
3 4
4 5
...

correct output
40

user output
256

Test 43

Group: 1, 4

Verdict:

input
10 3 1
1 2
2 3
2 4
2 5
...

correct output
96

user output
128

Test 44

Group: 1, 4

Verdict:

input
10 6 2
1 2
1 3
2 4
3 5
...

correct output
40

user output
256

Test 45

Group: 1, 4

Verdict:

input
10 2 1
1 2
1 3
3 4
4 5
...

correct output
30

user output
256

Test 46

Group: 1, 2, 4

Verdict: ACCEPTED

input
10 1 10
1 2
2 3
3 4
4 5
...

correct output
1

user output
1

Test 47

Group: 1, 2, 3, 4

Verdict:

input
3 1 1
1 2
2 3

correct output
3

user output
4

Test 48

Group: 1, 2, 3, 4

Verdict:

input
3 3 3
1 2
2 3

correct output
3

user output
4

Test 49

Group: 1, 2, 4

Verdict: ACCEPTED

input
3 2 3
1 2
2 3

correct output
2

user output
2

Test 50

Group: 1, 4

Verdict: ACCEPTED

input
7 2 5
2 7
5 7
2 1
5 3
...

correct output
16

user output
16

Test 51

Group: 2, 4

Verdict: ACCEPTED

input
200000 1 200000
1 2
2 3
3 4
4 5
...

correct output
1

user output
1

Test 52

Group: 2, 3, 4

Verdict:

input
200000 1 1
1 2
2 3
3 4
4 5
...

correct output
200000

user output
(empty)

Test 53

Group: 2, 3, 4

Verdict:

input
200000 200000 200000
1 2
2 3
3 4
4 5
...

correct output
200000

user output
(empty)

Test 54

Group: 2, 3, 4

Verdict:

input
200000 100000 100000
1 2
2 3
3 4
4 5
...

correct output
99930

user output
(empty)

Test 55

Group: 2, 4

Verdict:

input
200000 37563 118902
1 2
2 3
3 4
4 5
...

correct output
46321716

user output
(empty)

Test 56

Group: 2, 4

Verdict:

input
200000 50775 167353
1 2
2 3
3 4
4 5
...

correct output
657702193

user output
(empty)

Test 57

Group: 2, 4

Verdict:

input
200000 146383 37930
1 2
2 3
3 4
4 5
...

correct output
33730726

user output
(empty)

Test 58

Group: 2, 4

Verdict:

input
200000 139297 64408
1 2
2 3
3 4
4 5
...

correct output
909823211

user output
(empty)

Test 59

Group: 2, 4

Verdict:

input
200000 96291 60612
1 2
2 3
3 4
4 5
...

correct output
286070478

user output
(empty)

Test 60

Group: 2, 4

Verdict:

input
199999 132295 169486
1 2
2 3
3 4
4 5
...

correct output
36849602

user output
(empty)

Test 61

Group: 2, 4

Verdict:

input
199999 40570 132081
1 2
2 3
3 4
4 5
...

correct output
755473816

user output
(empty)

Test 62

Group: 2, 4

Verdict:

input
200000 66666 133332
1 2
2 3
3 4
4 5
...

correct output
444555526

user output
(empty)

Test 63

Group: 4

Verdict:

input
200000 74284 172335
1 2
2 3
2 4
4 5
...

correct output
813676449

user output
(empty)

Test 64

Group: 4

Verdict:

input
200000 69598 27760
1 2
2 3
3 4
2 5
...

correct output
646690172

user output
(empty)

Test 65

Group: 4

Verdict:

input
200000 49557 15601
1 2
2 3
1 4
3 5
...

correct output
566402541

user output
(empty)

Test 66

Group: 4

Verdict:

input
200000 154301 42324
1 2
2 3
1 4
4 5
...

correct output
626928627

user output
(empty)

Test 67

Group: 4

Verdict:

input
200000 73912 80615
1 2
1 3
2 4
4 5
...

correct output
173675070

user output
(empty)

Test 68

Group: 4

Verdict:

input
200000 49444 123149
1 2
2 3
1 4
4 5
...

correct output
293033335

user output
(empty)

Test 69

Group: 4

Verdict:

input
200000 68176 124500
1 2
1 3
3 4
3 5
...

correct output
18856604

user output
(empty)

Test 70

Group: 4

Verdict:

input
200000 184565 72280
1 2
1 3
2 4
4 5
...

correct output
219119175

user output
(empty)

Test 71

Group: 4

Verdict:

input
200000 94918 182877
1 2
1 3
1 4
1 5
...

correct output
752671766

user output
(empty)

Test 72

Group: 4

Verdict:

input
200000 187918 126305
1 2
1 3
3 4
1 5
...

correct output
29685111

user output
(empty)

Test 73

Group: 3, 4

Verdict:

input
200000 97734 97734
1 2
2 3
2 4
3 5
...

correct output
328993565

user output
(empty)

Test 74

Group: 3, 4

Verdict:

input
200000 148516 148516
1 2
2 3
1 4
1 5
...

correct output
127541604

user output
(empty)

Test 75

Group: 3, 4

Verdict:

input
200000 190703 190703
1 2
1 3
3 4
2 5
...

correct output
416752559

user output
(empty)

Test 76

Group: 3, 4

Verdict:

input
200000 37698 37698
1 2
2 3
1 4
2 5
...

correct output
416871404

user output
(empty)

Test 77

Group: 3, 4

Verdict:

input
200000 116531 116531
1 2
1 3
2 4
1 5
...

correct output
748204701

user output
(empty)

Test 78

Group: 3, 4

Verdict:

input
200000 27284 27284
1 2
2 3
2 4
4 5
...

correct output
76035204

user output
(empty)

Test 79

Group: 3, 4

Verdict:

input
200000 122685 122685
1 2
1 3
2 4
4 5
...

correct output
337610563

user output
(empty)

Test 80

Group: 3, 4

Verdict:

input
200000 107933 107933
1 2
2 3
2 4
4 5
...

correct output
208311114

user output
(empty)

Test 81

Group: 3, 4

Verdict:

input
200000 138885 138885
1 2
2 3
2 4
3 5
...

correct output
256430889

user output
(empty)

Test 82

Group: 3, 4

Verdict:

input
200000 58880 58880
1 2
2 3
2 4
4 5
...

correct output
768053967

user output
(empty)

Test 83

Group: 2, 4

Verdict:

input
200000 75000 90943
168194 176825
176825 120246
120246 59194
59194 193803
...

correct output
391201968

user output
(empty)

Test 84

Group: 2, 4

Verdict:

input
200000 143557 105030
114244 129713
129713 100457
100457 70708
70708 178413
...

correct output
21500831

user output
(empty)

Test 85

Group: 1, 2, 4

Verdict:

input
10 7 6
4 2
2 7
7 10
10 6
...

correct output
18

user output
128

Test 86

Group: 1, 2, 4

Verdict: ACCEPTED

input
10 1 8
1 6
6 10
10 3
3 7
...

correct output
1

user output
1