CSES - Aalto Competitive Programming 2024 - wk2 - Wed - Results
Submission details
Task:Astralis session I
Sender:aalto2024b_002
Submission time:2024-09-11 17:49:50 +0300
Language:C++20
Status:READY
Result:
Test results
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Compiler report

input/code.cpp: In function 'int main()':
input/code.cpp:35:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         for(int i=0; i<friends.size(); i++){
      |                      ~^~~~~~~~~~~~~~~
input/code.cpp:42:39: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'unsigned int' [-Wsign-compare]
   42 |                 if(sum[friends[i][0]] == n/2){
input/code.cpp:60:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |         for(int i=0; i<added[V].size(); i++){
      |                      ~^~~~~~~~~~~~~~~~
input/code.cpp:65:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<bool>::size_type' {aka 'lo...

Code

#include <iostream>
#include <vector>
#include <queue>


using namespace std;




int main(){
    unsigned int n;
    cin >> n;
 
    vector<vector<int>> friends(n);
 
    for(unsigned int i=0; i<n-1; i++){
        int a,b;
        cin >> a >> b;
        friends[a-1].push_back(b-1);
        friends[b-1].push_back(a-1);
    }

    vector<int> sum(n,0);

    vector<vector<int>> added(n);


    bool done = false;
    bool change = false;
    int V;

    while(not done){
        change = false;
        for(int i=0; i<friends.size(); i++){
            if(friends[i].size()==1){

                sum[friends[i][0]] += sum[i] +1;

                added[friends[i][0]].insert(end(added[friends[i][0]]), begin(added[i]), end(added[i]));
                added[friends[i][0]].push_back(i);
                if(sum[friends[i][0]] == n/2){
                    done = true;
                    V = friends[i][0];
                }
                change = true;

                
            }
            
        }
        if(change == false){
            break;
        }
    }
    if(not done) cout << "No";
    else{
        vector<bool> a(n,false);

        for(int i=0; i<added[V].size(); i++){
            a[added[V][i]] = true;
        }
        a[V] = true;
        cout << "Yes"<<endl;
        for(int i=0; i< a.size(); i++){
            if(a[i]==true){
                cout<<'U';

            }
            else cout << 'M';
        }

    }

    

}

Test details

Test 1

Verdict:

input
2
1 2

correct output
Yes
MU

user output
Yes
UU

Test 2

Verdict:

input
6
1 3
2 3
2 6
4 6
...

correct output
No

user output
Yes
MUMMUM

Test 3

Verdict:

input
6
1 2
2 3
3 6
2 4
...

correct output
No

user output
Yes
MMUMMU

Test 4

Verdict:

input
6
1 6
1 4
2 4
2 3
...

correct output
No

user output
Yes
UMMMMU

Test 5

Verdict:

input
6
2 4
1 4
2 6
1 3
...

correct output
Yes
MUMUMU

user output
Yes
MUMMMU

Test 6

Verdict:

input
8
1 8
5 8
3 5
3 6
...

correct output
Yes
MUMUMUUM

user output
Yes
MUMUMMUM

Test 7

Verdict:

input
8
1 4
1 6
3 6
1 5
...

correct output
Yes
MUUMMUMU

user output
Yes
MMUMMMMU

Test 8

Verdict:

input
8
1 7
1 3
1 8
2 8
...

correct output
No

user output
Yes
UMMMUMUM

Test 9

Verdict:

input
8
2 3
3 8
7 8
5 8
...

correct output
Yes
MMUMUMUU

user output
Yes
MMMMUMUU

Test 10

Verdict:

input
10
4 8
4 7
1 7
3 4
...

correct output
Yes
MUMMMUMUUU

user output
Yes
UMMMUMUMMM

Test 11

Verdict:

input
10
3 4
4 5
4 8
4 10
...

correct output
No

user output
Yes
MMMUMMMUMU

Test 12

Verdict:

input
10
1 3
2 3
2 6
6 10
...

correct output
Yes
MMMUUMUMUU

user output
Yes
MMMUUMMMUM

Test 13

Verdict:

input
10
1 10
1 3
6 10
8 10
...

correct output
No

user output
Yes
MMMMUMMUMU

Test 14

Verdict:

input
10
1 6
1 4
2 4
2 9
...

correct output
No

user output
Yes
MMUUUMUUMM

Test 15

Verdict: ACCEPTED

input
12
4 10
4 11
9 11
6 11
...

correct output
Yes
UUUMUMMUMUMM

user output
Yes
UUUMUMMUMUMM

Test 16

Verdict:

input
12
1 2
1 8
5 8
3 8
...

correct output
Yes
MUMMMUUMUUUM

user output
Yes
MMUUUMMUMMMM

Test 17

Verdict:

input
14
9 12
6 9
3 6
3 11
...

correct output
No

user output
Yes
MMMUMMMUMMMMMU

Test 18

Verdict:

input
14
13 14
7 13
3 7
7 10
...

correct output
Yes
UMMMMUMUUMUUMU

user output
Yes
UMMMMMMMMMUMMM

Test 19

Verdict:

input
14
1 3
3 8
3 7
8 9
...

correct output
Yes
MUUUMMUUUMMMMU

user output
Yes
UMMMUMMMMUMMMM

Test 20

Verdict:

input
16
4 12
1 4
12 16
11 12
...

correct output
No

user output
Yes
MMMMMUMMUMMMMUMM

Test 21

Verdict:

input
18
12 13
13 17
8 13
12 15
...

correct output
No

user output
Yes
MMMMMUUMMMMUMMMMMU

Test 22

Verdict:

input
100
24 28
28 65
28 58
54 65
...

correct output
Yes
MMUUMUMMUMUMUUMUUMMUUUMMMUUUUM...

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 23

Verdict:

input
100
57 98
24 57
24 34
25 34
...

correct output
Yes
MUUMUMUUUMMUMMUMUMMMMMUUUMUUMM...

user output
Yes
MUMMMMMMUMMMMMMMMMMMMMMMMMMMMM...

Test 24

Verdict:

input
100
6 41
6 20
6 18
6 88
...

correct output
Yes
MMMMUMMMUMUUMMUUUMMMUUUUUMUUUU...

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMUMMM...

Test 25

Verdict:

input
100
24 100
92 100
62 100
88 100
...

correct output
Yes
MUUMMUUMMUMUMUMUUUUUUMMMUMUMUM...

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 26

Verdict:

input
100
65 83
68 83
65 87
21 65
...

correct output
No

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 27

Verdict:

input
100
12 87
12 56
41 56
11 41
...

correct output
No

user output
Yes
MMMMMMMMUMMMMMMMMMMMMMMMMMMMMM...

Test 28

Verdict:

input
100
13 29
13 38
13 34
10 13
...

correct output
Yes
MMMMUUMUMMUUMMUUMMMUMMUUMMUUUU...

user output
Yes
MMMMMMMMMMUMMMMMMMMMMMMMMMMMMM...

Test 29

Verdict:

input
100
77 94
52 77
53 77
53 56
...

correct output
No

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 30

Verdict:

input
100
56 59
56 76
17 76
17 75
...

correct output
No

user output
Yes
MMMMMMMMMMMUMMMMMMMMMMMMMMMMMM...

Test 31

Verdict:

input
100
19 70
70 86
27 86
27 31
...

correct output
Yes
MMMMUMMUMMUUMMUMUUUMMMUMUMUUMU...

user output
Yes
MMUMMMMMMMMMMMMMMMMMUMMMMMMMMM...

Test 32

Verdict:

input
200
28 148
28 122
28 137
122 178
...

correct output
Yes
UUMUMMMUUMMUMMMUMMUUMUMUMUMMMU...

user output
Yes
MMMMMMMMMMMMMMUMMMMMMMMMMMMUMM...

Test 33

Verdict:

input
200
57 98
57 153
34 153
98 109
...

correct output
No

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 34

Verdict:

input
200
6 177
6 20
6 158
88 158
...

correct output
Yes
MUUMUMMMUMUUMUUUUUUMUMMMMUUMMU...

user output
Yes
MMUMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 35

Verdict:

input
200
142 178
119 142
142 155
119 140
...

correct output
No

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 36

Verdict:

input
200
83 150
68 83
68 158
135 158
...

correct output
Yes
MMMUUUUUUMUUUMUMUUMMMUMUUUMMUM...

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 37

Verdict:

input
200
20 177
87 177
121 177
137 177
...

correct output
Yes
MMUMUMMMUUUMUMUMMMUMUMUUUUUUMM...

user output
Yes
MMMMMMMMMMMMUMMMMMMMMMUMMMMMMM...

Test 38

Verdict:

input
200
13 139
13 38
13 34
10 38
...

correct output
Yes
MUMMUUMUUMUUMMUMMMMUMMUMUUUMMU...

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 39

Verdict:

input
200
84 198
77 198
52 198
53 77
...

correct output
Yes
MMMUMUMMMUUUUMUUUMMMMMUMUMUUUU...

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 40

Verdict:

input
200
56 112
76 112
56 182
56 114
...

correct output
No

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 41

Verdict:

input
200
19 114
19 70
70 86
19 27
...

correct output
Yes
MMMUMUUUUUMUMMMMMMMUUMMUMMMMUM...

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 42

Verdict:

input
1000
811 883
397 883
137 397
546 883
...

correct output
Yes
MMMMMUUMUMUUUUUUMUMUMMMMUMMUMM...

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 43

Verdict:

input
1000
393 736
393 398
398 407
351 393
...

correct output
No

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 44

Verdict:

input
1000
507 955
340 955
507 813
418 955
...

correct output
No

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 45

Verdict:

input
1000
230 974
230 440
440 752
752 977
...

correct output
No

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 46

Verdict:

input
1000
406 944
778 944
68 944
545 778
...

correct output
Yes
UMUMMUMUUMUUMUUMUMMUUMUUMUUUUM...

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 47

Verdict:

input
1000
771 921
368 921
121 921
121 810
...

correct output
Yes
UMMUUUUUMUMMUMUMUUUUMMMMUMUUMM...

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 48

Verdict:

input
1000
290 518
518 738
518 554
290 997
...

correct output
No

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 49

Verdict:

input
1000
370 791
390 791
390 835
585 835
...

correct output
Yes
MMUUUUUMMMUMMUMMMMMMUUMMUMMMMU...

user output
Yes
MMMMUMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 50

Verdict:

input
1000
111 804
778 804
520 804
520 829
...

correct output
Yes
MMMUMUUUUUMMMUMMMMMUUMMUMMUUUU...

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 51

Verdict:

input
1000
627 823
399 627
27 399
27 945
...

correct output
Yes
MMUMMMMUUMMUUMUUUUUMUMMUMMMMMU...

user output
Yes
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Test 52

Verdict:

input
100000
26991 68205
21905 68205
3029 26991
21905 29288
...

correct output
No

user output
(empty)

Test 53

Verdict:

input
100000
41845 94618
94618 96640
65841 94618
9894 96640
...

correct output
Yes
UMUUUMMUUUMMUMMUMUMMMUMMMUMUMU...

user output
(empty)

Test 54

Verdict:

input
100000
11081 29940
11081 90273
11081 56653
56653 73314
...

correct output
Yes
UMMUUMMMUUMMMMMUUMMUUUMUMMMUUU...

user output
(empty)

Test 55

Verdict:

input
100000
27549 31873
27549 48777
48777 71940
48777 59266
...

correct output
Yes
MMMMUUMUUMUMUMMUUUMMUMMMUMUUUM...

user output
(empty)

Test 56

Verdict:

input
100000
2460 57807
2460 59927
56550 59927
35046 56550
...

correct output
Yes
MMMUUMMUMMUUUMMUMUMMMUMUUMUMUM...

user output
(empty)

Test 57

Verdict:

input
100000
13089 77222
77222 89616
36711 89616
27645 77222
...

correct output
Yes
UMUUUMMMUUUUMMUMMMUUMMUUMUMUMU...

user output
(empty)

Test 58

Verdict:

input
100000
35805 70440
70440 82302
64483 82302
64483 96767
...

correct output
Yes
MMMUUMMMUUUMMMUUMUUMUMMUUUMUUM...

user output
(empty)

Test 59

Verdict:

input
100000
16206 68738
37820 68738
55519 68738
55519 77758
...

correct output
Yes
MMUUUMUUMUUMUUMUMMMMMUMUUUUUUU...

user output
(empty)

Test 60

Verdict:

input
100000
47137 86808
47137 80136
47137 73346
73346 78144
...

correct output
Yes
UUMUMMUUUUMMMMMMMMUUMMMMMMUUMU...

user output
(empty)

Test 61

Verdict:

input
100000
39438 53660
53660 60245
20924 60245
20924 38669
...

correct output
No

user output
(empty)