Submission details
Task:Chess board tour
Sender:Abduvohid
Submission time:2025-11-03 17:27:23 +0200
Language:Python3 (PyPy3)
Status:READY
Result:
Test results
testverdicttime
#10.04 sdetails
#20.05 sdetails
#3ACCEPTED0.05 sdetails
#40.04 sdetails
#50.04 sdetails
#6ACCEPTED0.04 sdetails
#70.04 sdetails
#8ACCEPTED0.04 sdetails
#9ACCEPTED0.04 sdetails
#100.04 sdetails
#11ACCEPTED0.04 sdetails
#120.04 sdetails
#13ACCEPTED0.04 sdetails
#140.04 sdetails
#150.04 sdetails
#16ACCEPTED0.04 sdetails
#17ACCEPTED0.05 sdetails
#180.04 sdetails
#19ACCEPTED0.04 sdetails
#200.04 sdetails
#210.04 sdetails
#22ACCEPTED0.04 sdetails
#230.04 sdetails
#240.04 sdetails
#250.04 sdetails
#260.04 sdetails
#270.04 sdetails
#280.04 sdetails
#290.04 sdetails
#300.04 sdetails
#31ACCEPTED0.04 sdetails
#32ACCEPTED0.04 sdetails
#330.05 sdetails
#340.04 sdetails
#350.04 sdetails
#360.04 sdetails
#37ACCEPTED0.04 sdetails
#380.05 sdetails
#390.05 sdetails
#400.05 sdetails
#410.09 sdetails
#420.04 sdetails
#430.08 sdetails
#44ACCEPTED0.04 sdetails
#450.08 sdetails
#460.04 sdetails
#47--details
#48--details
#49--details
#500.10 sdetails
#51--details
#52ACCEPTED0.04 sdetails
#53--details
#540.05 sdetails
#550.06 sdetails
#560.04 sdetails

Code

n, m = map(int, input().split())


if (n * m) % 2 != 0:
    print(-1)
else:
    res = ""
    if n % 2 == 0:
        #print('YES')
        for i in range(n-1):
            res += 'D'
        for i in range(m-1):
            res += 'R'
        for i in range(n-2):
            res += 'U'
            if i % 2 == 0:
                for j in range(m-2): 
                    res += 'L'
            else:
                for j in range(m-2): 
                    res += 'R'
        res += 'U'
        for i in range(n):
            res += 'L'
    else:
        #print('NO')
        for i in range(m-1):
            res += 'R'
        for i in range(n-1):
            res += 'D'
        #res += '\n'
        for i in range(n-3):
            res += 'L'
            if i % 2 == 0:
                for j in range(n-2): 
                    res += 'U'
            else:
                for j in range(n-2): 
                    res += 'D'
        res += 'L'
        for i in range(m):
            res += 'U'
    print(res)

Test details

Test 1

Verdict:

input
2 2

correct output
DRUL

user output
DRULL

Test 2

Verdict:

input
2 2

correct output
DRUL

user output
DRULL

Test 3

Verdict: ACCEPTED

input
2 3

correct output
RRDLLU

user output
DRRULL

Test 4

Verdict:

input
2 2

correct output
DRUL

user output
DRULL

Test 5

Verdict:

input
4 4

correct output
DDDRUURDDRUUULLL

user output
DDDRRRULLURRULLLL

Test 6

Verdict: ACCEPTED

input
3 3

correct output
-1

user output
-1

Test 7

Verdict:

input
4 4

correct output
DDDRUURDDRUUULLL

user output
DDDRRRULLURRULLLL

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
RDDLUU

Test 10

Verdict:

input
4 2

correct output
DDDRUUUL

user output
DDDRUUULLLL

Test 11

Verdict: ACCEPTED

input
5 5

correct output
-1

user output
-1

Test 12

Verdict:

input
2 2

correct output
DRUL

user output
DRULL

Test 13

Verdict: ACCEPTED

input
5 5

correct output
-1

user output
-1

Test 14

Verdict:

input
2 2

correct output
DRUL

user output
DRULL

Test 15

Verdict:

input
5 2

correct output
DDDDRUUUUL

user output
RDDDDLUUULDDDLUU

Test 16

Verdict: ACCEPTED

input
2 3

correct output
RRDLLU

user output
DRRULL

Test 17

Verdict: ACCEPTED

input
6 7

correct output
RRRRRRDLLLLLDRRRRRDLLLLLDRRRRR...

user output
DDDDDRRRRRRULLLLLURRRRRULLLLLU...

Test 18

Verdict:

input
5 10

correct output
DDDDRUUURDDDRUUURDDDRUUURDDDRU...

user output
RRRRRRRRRDDDDLUUULDDDLUUUUUUUU...

Test 19

Verdict: ACCEPTED

input
5 3

correct output
-1

user output
-1

Test 20

Verdict:

input
6 2

correct output
DDDDDRUUUUUL

user output
DDDDDRUUUUULLLLLL

Test 21

Verdict:

input
10 10

correct output
DDDDDDDDDRUUUUUUUURDDDDDDDDRUU...

user output
DDDDDDDDDRRRRRRRRRULLLLLLLLURR...
Truncated

Test 22

Verdict: ACCEPTED

input
3 2

correct output
DDRUUL

user output
RDDLUU

Test 23

Verdict:

input
10 10

correct output
DDDDDDDDDRUUUUUUUURDDDDDDDDRUU...

user output
DDDDDDDDDRRRRRRRRRULLLLLLLLURR...
Truncated

Test 24

Verdict:

input
2 4

correct output
DRRRULLL

user output
DRRRULL

Test 25

Verdict:

input
9 2

correct output
DDDDDDDDRUUUUUUUUL

user output
RDDDDDDDDLUUUUUUULDDDDDDDLUUUU...

Test 26

Verdict:

input
2 5

correct output
RRRRDLLLLU

user output
DRRRRULL

Test 27

Verdict:

input
56 60

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 28

Verdict:

input
43 100

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 29

Verdict:

input
45 20

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
RRRRRRRRRRRRRRRRRRRDDDDDDDDDDD...
Truncated

Test 30

Verdict:

input
56 9

correct output
RRRRRRRRDLLLLLLLDRRRRRRRDLLLLL...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
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
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 34

Verdict:

input
9 24

correct output
DDDDDDDDRUUUUUUURDDDDDDDRUUUUU...

user output
RRRRRRRRRRRRRRRRRRRRRRRDDDDDDD...
Truncated

Test 35

Verdict:

input
88 3

correct output
RRDLDRDLDRDLDRDLDRDLDRDLDRDLDR...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 36

Verdict:

input
3 38

correct output
DDRURDRURDRURDRURDRURDRURDRURD...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...

Test 37

Verdict: ACCEPTED

input
111 119

correct output
-1

user output
-1

Test 38

Verdict:

input
84 200

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 39

Verdict:

input
88 38

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 40

Verdict:

input
111 16

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
RRRRRRRRRRRRRRRDDDDDDDDDDDDDDD...
Truncated

Test 41

Verdict:

input
194 181

correct output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 42

Verdict:

input
46 12

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 43

Verdict:

input
179 190

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...
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
RRRDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 46

Verdict:

input
4 74

correct output
DDDRUURDDRUURDDRUURDDRUURDDRUU...

user output
DDDRRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 47

Verdict:

input
550 594

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
(empty)

Test 48

Verdict:

input
418 998

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
(empty)

Test 49

Verdict:

input
437 186

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
(empty)

Test 50

Verdict:

input
552 72

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 51

Verdict:

input
968 901

correct output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...

user output
(empty)

Test 52

Verdict: ACCEPTED

input
223 57

correct output
-1

user output
-1

Test 53

Verdict:

input
893 948

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
(empty)

Test 54

Verdict:

input
78 229

correct output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 55

Verdict:

input
874 13

correct output
RRRRRRRRRRRRDLLLLLLLLLLLDRRRRR...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 56

Verdict:

input
12 366

correct output
DDDDDDDDDDDRUUUUUUUUUURDDDDDDD...

user output
DDDDDDDDDDDRRRRRRRRRRRRRRRRRRR...
Truncated