CSES - HIIT Open 2019 - Results
Submission details
Task:L-Trominos
Sender:Varokaa J:tä
Submission time:2019-05-25 15:53:48 +0300
Language:C++
Status:READY
Result:
Test results
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Code

#include <iostream>
#include <string>

using namespace std;

char res[105][105];

void printres(int n, int m) {
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m; ++j) {
            cout << res[i][j];
        }
        cout << "\n";
    }
}

void printresinv(int n, int m) {
    for (int j = 0; j < n; ++j) {
        for (int i = 0; i < m; ++i) {
            cout << res[i][j];
        }
        cout << "\n";
    }
}

void onlyhoriz(int n, int m) {
    string t[4] = {"AAB", "ABB", "CCD", "CDD"};
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m/3; ++j) {
            string s = t[i%4];
            for (int k = 0; k < 3; ++k) {
                res[i][3*j+k] = s[k];
            }
        }
    }
}

void doublevert(int n, int m) {
    string t[4] = {"AAB", "ABB", "CCD", "CDD"};
    string v[3] = {"EE", "EF", "FF"};
    string v2[3] = {"GG", "GH", "HH"};
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m/3 - 1; ++j) {
            string s = t[i%4];
            for (int k = 0; k < 3; ++k) {
                res[i][3*j+k] = s[k];
            }
        }
        string s = v[i%3];
        res[i][3*(m/3-1)] = s[0];
        res[i][3*(m/3-1)+1] = s[1];
        
        string s2 = v2[i%3];
        res[i][3*(m/3-1)+2] = s2[0];
        res[i][3*(m/3-1)+3] = s2[1];
    }
}

void singlevert(int n, int m) {
    string t[4] = {"AAB", "ABB", "CCD", "CDD"};
    string v[3] = {"EE", "EF", "FF"};
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m/3; ++j) {
            string s = t[i%4];
            for (int k = 0; k < 3; ++k) {
                res[i][3*j+k] = s[k];
            }
        }
        string s = v[i%3];
        res[i][3*(m/3)] = s[0];
        res[i][3*(m/3)+1] = s[1];
    }
}

void largeblock(int n, int m) {
    string t[9] = {"AABAA", "ABBDA", "CCDDB", "CAABB", "BBACC", "BABBC", "AABAA", "CDDAE", "CCDEE"};
    string v1[3] = {"FF", "FG", "GG"};
    string v2[3] = {"HH", "HI", "II"};
    
    for (int i = 0; i < n; ++i) {
        string s = t[i%9];
        for (int j = 0; j < 5; ++j) {
            res[i][j] = s[j];
        }
        for (int j = 5; j < m; j += 4) {
            string s1 = v1[i%3];
            string s2 = v2[i%3];
            res[i][j] = s1[0];
            res[i][j+1] = s1[1];
            if (j+3 < m) {
                res[i][j+2] = s2[0];
                res[i][j+3] = s2[1];
            }
        }
    }
}

bool solve(int y, int x) {
    if (y == 1 || x == 1) return false;
    
    if (y%2 == 1 && x%2 == 1) {
        if (x >= 5 && x%2 == 1) {
            largeblock(y, x);
            return true;
        }
        else {
            return false;
        }   
    }
    
    if (x%3 == 0) {
        if (y%2 == 0) {
            onlyhoriz(y, x);
        }
        else {
            return false;
        }
    }
    else if (x%3 == 1) {
        if (y%6 == 0) {
            doublevert(y, x);
        }
        else {
            return false;
        }
    }
    else {
        if (y%6 == 0) {
            singlevert(y, x);
        }
        else {
            return false;
        }
    }
    return true;
}


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n, m;
    cin >> n >> m;
    if (solve(n, m)) printres(n, m);
    else if (solve(m, n)) printresinv(n, m);
    else cout << "IMPOSSIBLE\n";
    return 0;
}

Test details

Test 1

Verdict: ACCEPTED

input
1 1

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 2

Verdict: ACCEPTED

input
1 2

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 3

Verdict: ACCEPTED

input
1 3

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 4

Verdict: ACCEPTED

input
1 4

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 5

Verdict: ACCEPTED

input
1 5

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 6

Verdict: ACCEPTED

input
1 6

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 7

Verdict: ACCEPTED

input
1 9

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 8

Verdict: ACCEPTED

input
2 1

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 9

Verdict: ACCEPTED

input
2 2

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 10

Verdict: ACCEPTED

input
2 3

correct output
GHH
GGH

user output
AAB
ABB

Test 11

Verdict: ACCEPTED

input
2 4

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 12

Verdict: ACCEPTED

input
2 5

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 13

Verdict: ACCEPTED

input
2 6

correct output
GHHJFF
GGHJJF

user output
AABAAB
ABBABB

Test 14

Verdict: ACCEPTED

input
2 9

correct output
GHHJFFHII
GGHJJFHHI

user output
AABAABAAB
ABBABBABB

Test 15

Verdict: ACCEPTED

input
3 1

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 16

Verdict: ACCEPTED

input
3 2

correct output
GG
HG
HH

user output
AA
AB
BB

Test 17

Verdict: ACCEPTED

input
3 3

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 18

Verdict: ACCEPTED

input
3 4

correct output
GGII
GLIN
LLNN

user output
AACC
ABCD
BBDD

Test 19

Verdict:

input
3 5

correct output
IMPOSSIBLE

user output
AABAA
ABBDA
CCDDB

Test 20

Verdict: ACCEPTED

input
3 6

correct output
GGIIFF
GLINFK
LLNNKK

user output
AACCAA
ABCDAB
BBDDBB

Test 21

Verdict:

input
3 7

correct output
IMPOSSIBLE

user output
AABAAFF
ABBDAFG
CCDDBGG

Test 22

Verdict: ACCEPTED

input
3 8

correct output
GGIIFFHH
GLINFKHM
LLNNKKMM

user output
AACCAACC
ABCDABCD
BBDDBBDD

Test 23

Verdict:

input
3 9

correct output
IMPOSSIBLE

user output
AABAAFFHH
ABBDAFGHI
CCDDBGGII

Test 24

Verdict: ACCEPTED

input
3 10

correct output
GGIIFFHHJJ
GLINFKHMJO
LLNNKKMMOO

user output
AACCAACCAA
ABCDABCDAB
BBDDBBDDBB

Test 25

Verdict: ACCEPTED

input
4 1

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 26

Verdict: ACCEPTED

input
4 2

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 27

Verdict: ACCEPTED

input
4 3

correct output
GGL
GLL
IIN
INN

user output
AAB
ABB
CCD
CDD

Test 28

Verdict: ACCEPTED

input
4 4

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 29

Verdict: ACCEPTED

input
4 5

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 30

Verdict: ACCEPTED

input
4 6

correct output
GHHJFF
GGHJJF
QRRTPP
QQRTTP

user output
AABAAB
ABBABB
CCDCCD
CDDCDD

Test 31

Verdict: ACCEPTED

input
4 9

correct output
GHHJFFHII
GGHJJFHHI
QRRTPPRSS
QQRTTPRRS

user output
AABAABAAB
ABBABBABB
CCDCCDCCD
CDDCDDCDD

Test 32

Verdict: ACCEPTED

input
5 1

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 33

Verdict: ACCEPTED

input
5 2

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 34

Verdict:

input
5 3

correct output
IMPOSSIBLE

user output
AAC
ABC
BBD
ADD
AAB

Test 35

Verdict: ACCEPTED

input
5 4

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 36

Verdict:

input
5 5

correct output
IMPOSSIBLE

user output
AABAA
ABBDA
CCDDB
CAABB
BBACC

Test 37

Verdict: ACCEPTED

input
5 6

correct output
GGIIFF
GMMIFK
QQMTKK
QVXTTU
VVXXUU

user output
AACCAA
ABCDAB
BBDDBB
EEFEEF
EFFEFF

Test 38

Verdict:

input
5 9

correct output
GGIIFGGII
GMMIFFGIN
QQMTTQQNN
QVXTUQWXX
VVXXUUWWX

user output
AABAAFFHH
ABBDAFGHI
CCDDBGGII
CAABBFFHH
BBACCFGHI

Test 39

Verdict: ACCEPTED

input
6 1

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 40

Verdict: ACCEPTED

input
6 2

correct output
GG
HG
HH
JJ
FJ
...

user output
EE
EF
FF
EE
EF
...

Test 41

Verdict: ACCEPTED

input
6 3

correct output
GGL
GLL
IIN
INN
FFK
...

user output
AAB
ABB
CCD
CDD
AAB
...

Test 42

Verdict: ACCEPTED

input
6 4

correct output
GGQQ
HGRQ
HHRR
JJTT
FJPT
...

user output
EEGG
EFGH
FFHH
EEGG
EFGH
...

Test 43

Verdict: ACCEPTED

input
6 5

correct output
GGQQV
GMQVV
IMMXX
IITTX
FFKTU
...

user output
AABEE
ABBEF
CCDFF
CDDEE
AABEF
...

Test 44

Verdict: ACCEPTED

input
6 6

correct output
GGIIFF
GLINFK
LLNNKK
VVXXUU
VBXDUA
...

user output
AABAAB
ABBABB
CCDCCD
CDDCDD
AABAAB
...

Test 45

Verdict: ACCEPTED

input
6 7

correct output
GHHJJGG
GGHJOGL
QRROOLL
QQRYYVV
BCCYEVB
...

user output
AABEEGG
ABBEFGH
CCDFFHH
CDDEEGG
AABEFGH
...

Test 46

Verdict: ACCEPTED

input
6 8

correct output
GGIIFFHH
GLINFKHM
LLNNKKMM
VVXXUUWW
VBXDUAWC
...

user output
AABAABEE
ABBABBEF
CCDCCDFF
CDDCDDEE
AABAABEF
...

Test 47

Verdict: ACCEPTED

input
6 9

correct output
GHHJJGGII
GGHJOGLIN
QRROOLLNN
QQRYYVVXX
BCCYEVBXD
...

user output
AABAABAAB
ABBABBABB
CCDCCDCCD
CDDCDDCDD
AABAABAAB
...

Test 48

Verdict: ACCEPTED

input
6 10

correct output
GGIIFFHHJJ
GLINFKHMJO
LLNNKKMMOO
VVXXUUWWYY
VBXDUAWCYE
...

user output
AABAABEEGG
ABBABBEFGH
CCDCCDFFHH
CDDCDDEEGG
AABAABEFGH
...

Test 49

Verdict:

input
7 3

correct output
IMPOSSIBLE

user output
AAC
ABC
BBD
ADD
AAB
...

Test 50

Verdict: ACCEPTED

input
7 6

correct output
GGQQBB
HGRQCB
HHRRCC
JJOYYE
JOOYEE
...

user output
AACCAA
ABCDAB
BBDDBB
EEFEEF
EFFEFF
...

Test 51

Verdict:

input
7 9

correct output
GGIIFGGII
GMMIFFGIN
QQMTTQQNN
QVXTUQWXX
VVXXUUWWX
...

user output
AABAAFFHH
ABBDAFGHI
CCDDBGGII
CAABBFFHH
BBACCFGHI
...

Test 52

Verdict: ACCEPTED

input
8 3

correct output
GGL
GLL
IIN
INN
FFK
...

user output
AAB
ABB
CCD
CDD
AAB
...

Test 53

Verdict: ACCEPTED

input
8 6

correct output
GGLVVB
GLLVBB
IINXXD
INNXDD
FFKUUA
...

user output
AABAAB
ABBABB
CCDCCD
CDDCDD
AABAAB
...

Test 54

Verdict: ACCEPTED

input
8 9

correct output
GHHJFFHII
GGHJJFHHI
QRRTPPRSS
QQRTTPRRS
BCCEAACDD
...

user output
AABAABAAB
ABBABBABB
CCDCCDCCD
CDDCDDCDD
AABAABAAB
...

Test 55

Verdict: ACCEPTED

input
9 1

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 56

Verdict: ACCEPTED

input
9 2

correct output
GG
HG
HH
JJ
FJ
...

user output
AA
AB
BB
AA
AB
...

Test 57

Verdict:

input
9 3

correct output
IMPOSSIBLE

user output
AAC
ABC
BBD
ADD
AAB
...

Test 58

Verdict: ACCEPTED

input
9 4

correct output
GGQQ
HGRQ
HHRR
JJTT
FJPT
...

user output
AACC
ABCD
BBDD
AACC
ABCD
...

Test 59

Verdict: ACCEPTED

input
9 5

correct output
GGQQV
GMQVV
IMMXX
IITTX
FFTUU
...

user output
AABAA
ABBDA
CCDDB
CAABB
BBACC
...

Test 60

Verdict: ACCEPTED

input
9 6

correct output
GGQQBB
HGRQCB
HHRRCC
JJOYYE
JOOYEE
...

user output
AACCAA
ABCDAB
BBDDBB
AACCAA
ABCDAB
...

Test 61

Verdict: ACCEPTED

input
9 7

correct output
GGQQVGG
GMQVVHG
IMMXXHH
IITTXJJ
FFTUUFJ
...

user output
AABAAFF
ABBDAFG
CCDDBGG
CAABBFF
BBACCFG
...

Test 62

Verdict: ACCEPTED

input
9 8

correct output
GGQQBBLL
HGRQCBML
HHRRCCMM
JJTTEEOO
FJPTAEKO
...

user output
AACCAACC
ABCDABCD
BBDDBBDD
AACCAACC
ABCDABCD
...

Test 63

Verdict: ACCEPTED

input
9 9

correct output
GHHJJGGII
GGHJOGLIN
QQSOOLLNN
QVSSYVVXX
VVDYYVBXD
...

user output
AABAAFFHH
ABBDAFGHI
CCDDBGGII
CAABBFFHH
BBACCFGHI
...

Test 64

Verdict: ACCEPTED

input
9 10

correct output
GGIIFFHHJJ
GLINFKHMJO
LLNNKKMMOO
VVXXUUWWYY
VBXDUAWCYE
...

user output
AACCAACCAA
ABCDABCDAB
BBDDBBDDBB
AACCAACCAA
ABCDABCDAB
...

Test 65

Verdict: ACCEPTED

input
10 3

correct output
GGL
GLL
IIN
INN
FFK
...

user output
AAB
ABB
CCD
CDD
AAB
...

Test 66

Verdict: ACCEPTED

input
10 6

correct output
GGLVVB
GLLVBB
IINXXD
INNXDD
FFKUUA
...

user output
AABAAB
ABBABB
CCDCCD
CDDCDD
AABAAB
...

Test 67

Verdict: ACCEPTED

input
10 9

correct output
GGLVVBLLQ
GLLVBBLQQ
IINXXDNNS
INNXDDNSS
FFKUUAKKP
...

user output
AABAABAAB
ABBABBABB
CCDCCDCCD
CDDCDDCDD
AABAABAAB
...

Test 68

Verdict: ACCEPTED

input
81 88

correct output
GGIIFFHHJJGGIIFFHHJJGGIIFFHHJJ...

user output
AACCAACCAACCAACCAACCAACCAACCAA...

Test 69

Verdict: ACCEPTED

input
32 27

correct output
GGLVVBLLQBBGQQVGGLVVBLLQBBG
GLLVBBLQQBGGQVVGLLVBBLQQBGG
IINXXDNNSDDISSXIINXXDNNSDDI
INNXDDNSSDIISXXINNXDDNSSDII
FFKUUAKKPAAFPPUFFKUUAKKPAAF
...

user output
AABAABAABAABAABAABAABAABAAB
ABBABBABBABBABBABBABBABBABB
CCDCCDCCDCCDCCDCCDCCDCCDCCD
CDDCDDCDDCDDCDDCDDCDDCDDCDD
AABAABAABAABAABAABAABAABAAB
...

Test 70

Verdict: ACCEPTED

input
63 76

correct output
GGIIFFHHJJGGIIFFHHJJGGIIFFHHJJ...

user output
AACCAACCAACCAACCAACCAACCAACCAA...

Test 71

Verdict: ACCEPTED

input
60 80

correct output
GGIIFFHHJJGGIIFFHHJJGGIIFFHHJJ...

user output
AABAABAABAABAABAABAABAABAABAAB...

Test 72

Verdict:

input
21 49

correct output
GHHJJGGIIFFHHJJGGIIFFHHJJGGIIF...

user output
AABAAFFHHFFHHFFHHFFHHFFHHFFHHF...

Test 73

Verdict: ACCEPTED

input
66 88

correct output
GGIIFFHHJJGGIIFFHHJJGGIIFFHHJJ...

user output
AABAABAABAABAABAABAABAABAABAAB...

Test 74

Verdict: ACCEPTED

input
98 42

correct output
GGLVVBLLQBBGQQVGGLVVBLLQBBGQQV...

user output
AABAABAABAABAABAABAABAABAABAAB...

Test 75

Verdict:

input
21 67

correct output
GHHJJGGIIFFHHJJGGIIFFHHJJGGIIF...

user output
AABAAFFHHFFHHFFHHFFHHFFHHFFHHF...

Test 76

Verdict:

input
87 13

correct output
GGQQVGGQQBBLL
GMQVVHGRQCBML
IMMXXHHRRCCMM
IITTXJJTTEEOO
FFTUUFJPTAEKO
...

user output
AABAAFFHHFFHH
ABBDAFGHIFGHI
CCDDBGGIIGGII
CAABBFFHHFFHH
BBACCFGHIFGHI
...

Test 77

Verdict: ACCEPTED

input
60 67

correct output
GHHJJGGIIFFHHJJGGIIFFHHJJGGIIF...

user output
AABAABAABAABAABAABAABAABAABAAB...

Test 78

Verdict:

input
13 57

correct output
GGIIFGGIIFFHHJJGGIIFFHHJJGGIIF...

user output
AABAAFFHHFFHHFFHHFFHHFFHHFFHHF...

Test 79

Verdict: ACCEPTED

input
50 12

correct output
GGLVVBLLQBBG
GLLVBBLQQBGG
IINXXDNNSDDI
INNXDDNSSDII
FFKUUAKKPAAF
...

user output
AABAABAABAAB
ABBABBABBABB
CCDCCDCCDCCD
CDDCDDCDDCDD
AABAABAABAAB
...

Test 80

Verdict:

input
21 39

correct output
GHHJJGGIIFFHHJJGGIIFFHHJJGGIIF...

user output
AABAAFFHHFFHHFFHHFFHHFFHHFFHHF...

Test 81

Verdict: ACCEPTED

input
19 66

correct output
GGIIFFHHJJGGIIFFHHJJGGIIFFHHJJ...

user output
AACCAACCAACCAACCAACCAACCAACCAA...

Test 82

Verdict: ACCEPTED

input
86 72

correct output
GGLVVBLLQBBGQQVGGLVVBLLQBBGQQV...

user output
AABAABAABAABAABAABAABAABAABAAB...

Test 83

Verdict: ACCEPTED

input
46 66

correct output
GHHJFFHIIFGGIJJGHHJFFHIIFGGIJJ...

user output
AABAABAABAABAABAABAABAABAABAAB...

Test 84

Verdict: ACCEPTED

input
96 72

correct output
GGLVVBLLQBBGQQVGGLVVBLLQBBGQQV...

user output
AABAABAABAABAABAABAABAABAABAAB...

Test 85

Verdict: ACCEPTED

input
93 40

correct output
GGQQBBLLVVGGQQBBLLVVGGQQBBLLVV...

user output
AACCAACCAACCAACCAACCAACCAACCAA...

Test 86

Verdict: ACCEPTED

input
92 69

correct output
GGLVVBLLQBBGQQVGGLVVBLLQBBGQQV...

user output
AABAABAABAABAABAABAABAABAABAAB...

Test 87

Verdict: ACCEPTED

input
13 96

correct output
GGIIFFHHJJGGIIFFHHJJGGIIFFHHJJ...

user output
AACCAACCAACCAACCAACCAACCAACCAA...

Test 88

Verdict:

input
3 99

correct output
IMPOSSIBLE

user output
AABAAFFHHFFHHFFHHFFHHFFHHFFHHF...

Test 89

Verdict: ACCEPTED

input
3 100

correct output
GGIIFFHHJJGGIIFFHHJJGGIIFFHHJJ...

user output
AACCAACCAACCAACCAACCAACCAACCAA...

Test 90

Verdict: ACCEPTED

input
99 100

correct output
GGIIFFHHJJGGIIFFHHJJGGIIFFHHJJ...

user output
AACCAACCAACCAACCAACCAACCAACCAA...

Test 91

Verdict: ACCEPTED

input
100 100

correct output
IMPOSSIBLE

user output
IMPOSSIBLE