Submission details
Task:Chess board tour
Sender:ileska
Submission time:2025-11-03 16:48:11 +0200
Language:Python3 (CPython3)
Status:READY
Result:
Test results
testverdicttime
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Code

def main(inpt):
    hh, ww = [int(aa) for aa in inpt.strip().split(" ")]
    if (hh % 2 == 1) and (ww % 2 == 1):
        print("-1")
        return
    if hh == 2:
        print("L"*(ww-1)+"D"+"R"*(ww-1)+"U")
        return 
    if ww == 2:
        print("D"*(hh-1)+"R"+"U"*(hh-1)+"L")   
        return

    if (hh % 2 == 1):
        ret = ("D" + 
        ("D"*(ww-1)+"R"+"U"*(ww-1)+"R")*(-1+ww//2)+
        "D"*(ww-1)+"R"+"U"*(ww-1) +
        "U"+"L"*(ww-1)
        )
        print(ret)
    else:
        ret = ("R" + 
        ("R"*(hh-1)+"D"+"L"*(hh-1)+"D")*(-1+hh//2)+
        "R"*(hh-1)+"D"+"L"*(hh-1) +
        "L"+"U"*(hh-1)
        )
        print(ret)
        

main(input())

Test details

Test 1

Verdict:

input
2 2

correct output
DRUL

user output
LDRU

Test 2

Verdict:

input
2 2

correct output
DRUL

user output
LDRU

Test 3

Verdict:

input
2 3

correct output
RRDLLU

user output
LLDRRU

Test 4

Verdict:

input
2 2

correct output
DRUL

user output
LDRU

Test 5

Verdict:

input
4 4

correct output
DDDRUURDDRUUULLL

user output
RRRRDLLLDRRRDLLLLUUU

Test 6

Verdict: ACCEPTED

input
3 3

correct output
-1

user output
-1

Test 7

Verdict:

input
4 4

correct output
DDDRUURDDRUUULLL

user output
RRRRDLLLDRRRDLLLLUUU

Test 8

Verdict: ACCEPTED

input
3 5

correct output
-1

user output
-1

Test 9

Verdict: ACCEPTED

input
3 2

correct output
DDRUUL

user output
DDRUUL

Test 10

Verdict: ACCEPTED

input
4 2

correct output
DDDRUUUL

user output
DDDRUUUL

Test 11

Verdict: ACCEPTED

input
5 5

correct output
-1

user output
-1

Test 12

Verdict:

input
2 2

correct output
DRUL

user output
LDRU

Test 13

Verdict: ACCEPTED

input
5 5

correct output
-1

user output
-1

Test 14

Verdict:

input
2 2

correct output
DRUL

user output
LDRU

Test 15

Verdict: ACCEPTED

input
5 2

correct output
DDDDRUUUUL

user output
DDDDRUUUUL

Test 16

Verdict:

input
2 3

correct output
RRDLLU

user output
LLDRRU

Test 17

Verdict: ACCEPTED

input
6 7

correct output
RRRRRRDLLLLLDRRRRRDLLLLLDRRRRR...

user output
RRRRRRDLLLLLDRRRRRDLLLLLDRRRRR...

Test 18

Verdict:

input
5 10

correct output
DDDDRUUURDDDRUUURDDDRUUURDDDRU...

user output
DDDDDDDDDDRUUUUUUUUURDDDDDDDDD...
Truncated

Test 19

Verdict: ACCEPTED

input
5 3

correct output
-1

user output
-1

Test 20

Verdict: ACCEPTED

input
6 2

correct output
DDDDDRUUUUUL

user output
DDDDDRUUUUUL

Test 21

Verdict:

input
10 10

correct output
DDDDDDDDDRUUUUUUUURDDDDDDDDRUU...

user output
RRRRRRRRRRDLLLLLLLLLDRRRRRRRRR...
Truncated

Test 22

Verdict: ACCEPTED

input
3 2

correct output
DDRUUL

user output
DDRUUL

Test 23

Verdict:

input
10 10

correct output
DDDDDDDDDRUUUUUUUURDDDDDDDDRUU...

user output
RRRRRRRRRRDLLLLLLLLLDRRRRRRRRR...
Truncated

Test 24

Verdict:

input
2 4

correct output
DRRRULLL

user output
LLLDRRRU

Test 25

Verdict: ACCEPTED

input
9 2

correct output
DDDDDDDDRUUUUUUUUL

user output
DDDDDDDDRUUUUUUUUL

Test 26

Verdict:

input
2 5

correct output
RRRRDLLLLU

user output
LLLLDRRRRU

Test 27

Verdict:

input
56 60

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 28

Verdict:

input
43 100

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 29

Verdict:

input
45 20

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDDDDDRUUUUUUUUU...
Truncated

Test 30

Verdict:

input
56 9

correct output
RRRRRRRRDLLLLLLLDRRRRRRRDLLLLL...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 31

Verdict: ACCEPTED

input
97 91

correct output
-1

user output
-1

Test 32

Verdict: ACCEPTED

input
23 7

correct output
-1

user output
-1

Test 33

Verdict:

input
90 95

correct output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 34

Verdict:

input
9 24

correct output
DDDDDDDDRUUUUUUURDDDDDDDRUUUUU...

user output
DDDDDDDDDDDDDDDDDDDDDDDDRUUUUU...
Truncated

Test 35

Verdict:

input
88 3

correct output
RRDLDRDLDRDLDRDLDRDLDRDLDRDLDR...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 36

Verdict:

input
3 38

correct output
DDRURDRURDRURDRURDRURDRURDRURD...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 37

Verdict: ACCEPTED

input
111 119

correct output
-1

user output
-1

Test 38

Verdict:

input
84 200

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 39

Verdict:

input
88 38

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 40

Verdict:

input
111 16

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDRUUUUUUUUUUUUU...
Truncated

Test 41

Verdict:

input
194 181

correct output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 42

Verdict:

input
46 12

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 43

Verdict:

input
179 190

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 44

Verdict: ACCEPTED

input
17 47

correct output
-1

user output
-1

Test 45

Verdict:

input
175 4

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDRUUURDDDRUUUULLL

Test 46

Verdict:

input
4 74

correct output
DDDRUURDDRUURDDRUURDDRUURDDRUU...

user output
RRRRDLLLDRRRDLLLLUUU

Test 47

Verdict:

input
550 594

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 48

Verdict:

input
418 998

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 49

Verdict:

input
437 186

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 50

Verdict:

input
552 72

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 51

Verdict:

input
968 901

correct output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 52

Verdict: ACCEPTED

input
223 57

correct output
-1

user output
-1

Test 53

Verdict:

input
893 948

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 54

Verdict:

input
78 229

correct output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 55

Verdict:

input
874 13

correct output
RRRRRRRRRRRRDLLLLLLLLLLLDRRRRR...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 56

Verdict:

input
12 366

correct output
DDDDDDDDDDDRUUUUUUUUUURDDDDDDD...

user output
RRRRRRRRRRRRDLLLLLLLLLLLDRRRRR...
Truncated