Submission details
Task:Chess board tour
Sender:Aurelien
Submission time:2025-11-03 17:16:44 +0200
Language:C++ (C++17)
Status:READY
Result:
Test results
testverdicttime
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Code

#include <bits/stdc++.h>
using namespace std;


typedef long long ll;
typedef vector<ll> vl;
typedef pair<ll,ll> pl;

#define F first
#define S second
#define PB push_back
#define MP make_pair

#define REP(i,a,b) for (ll i = a; i < b; i++)

int main() {
    ll n,m;
    cin >> n >> m;

    if(n%2 != 0 and m%2!=0) {
        cout << -1 << endl;
        return 0;
    }

    string path = "";

    REP(i,0,n) {
        path += "D";
    }
    path += "R";
    string move = "R";
    REP(i,0,n-1) {
        REP(j,0,m-2) {
            path += move;
        }
        path += "U";
        if(move == "R") move = "L";
        else move = "R";
    }
    REP(j,0,m-1) {
        path += "L";
    }
    //path += "L";
    
    
    cout << path << endl;
}

Test details

Test 1

Verdict:

input
2 2

correct output
DRUL

user output
DDRUL

Test 2

Verdict:

input
2 2

correct output
DRUL

user output
DDRUL

Test 3

Verdict:

input
2 3

correct output
RRDLLU

user output
DDRRULL

Test 4

Verdict:

input
2 2

correct output
DRUL

user output
DDRUL

Test 5

Verdict:

input
4 4

correct output
DDDRUURDDRUUULLL

user output
DDDDRRRULLURRULLL

Test 6

Verdict: ACCEPTED

input
3 3

correct output
-1

user output
-1

Test 7

Verdict:

input
4 4

correct output
DDDRUURDDRUUULLL

user output
DDDDRRRULLURRULLL

Test 8

Verdict: ACCEPTED

input
3 5

correct output
-1

user output
-1

Test 9

Verdict:

input
3 2

correct output
DDRUUL

user output
DDDRUUL

Test 10

Verdict:

input
4 2

correct output
DDDRUUUL

user output
DDDDRUUUL

Test 11

Verdict: ACCEPTED

input
5 5

correct output
-1

user output
-1

Test 12

Verdict:

input
2 2

correct output
DRUL

user output
DDRUL

Test 13

Verdict: ACCEPTED

input
5 5

correct output
-1

user output
-1

Test 14

Verdict:

input
2 2

correct output
DRUL

user output
DDRUL

Test 15

Verdict:

input
5 2

correct output
DDDDRUUUUL

user output
DDDDDRUUUUL

Test 16

Verdict:

input
2 3

correct output
RRDLLU

user output
DDRRULL

Test 17

Verdict:

input
6 7

correct output
RRRRRRDLLLLLDRRRRRDLLLLLDRRRRR...

user output
DDDDDDRRRRRRULLLLLURRRRRULLLLL...

Test 18

Verdict:

input
5 10

correct output
DDDDRUUURDDDRUUURDDDRUUURDDDRU...

user output
DDDDDRRRRRRRRRULLLLLLLLURRRRRR...

Test 19

Verdict: ACCEPTED

input
5 3

correct output
-1

user output
-1

Test 20

Verdict:

input
6 2

correct output
DDDDDRUUUUUL

user output
DDDDDDRUUUUUL

Test 21

Verdict:

input
10 10

correct output
DDDDDDDDDRUUUUUUUURDDDDDDDDRUU...

user output
DDDDDDDDDDRRRRRRRRRULLLLLLLLUR...
Truncated

Test 22

Verdict:

input
3 2

correct output
DDRUUL

user output
DDDRUUL

Test 23

Verdict:

input
10 10

correct output
DDDDDDDDDRUUUUUUUURDDDDDDDDRUU...

user output
DDDDDDDDDDRRRRRRRRRULLLLLLLLUR...
Truncated

Test 24

Verdict:

input
2 4

correct output
DRRRULLL

user output
DDRRRULLL

Test 25

Verdict:

input
9 2

correct output
DDDDDDDDRUUUUUUUUL

user output
DDDDDDDDDRUUUUUUUUL

Test 26

Verdict:

input
2 5

correct output
RRRRDLLLLU

user output
DDRRRRULLLL

Test 27

Verdict:

input
56 60

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
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
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
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
DDDDDDDDDRRRRRRRRRRRRRRRRRRRRR...
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
DDDRRRRRRRRRRRRRRRRRRRRRRRRRRR...
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
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
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
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
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
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 46

Verdict:

input
4 74

correct output
DDDRUURDDRUURDDRUURDDRUURDDRUU...

user output
DDDDRRRRRRRRRRRRRRRRRRRRRRRRRR...
Truncated

Test 47

Verdict:

input
550 594

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 48

Verdict:

input
418 998

correct output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
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
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
Truncated

Test 51

Verdict:

input
968 901

correct output
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR...

user output
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...
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
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
DDDDDDDDDDDDRRRRRRRRRRRRRRRRRR...
Truncated