TopCoder Statistics - Problem Statement

Problem Statement

Consider the set of integers between 1 and n, inclusive, and two positive integers c and k. You want to build an ordered list of k pairs (x₁, y₁), (x₂, y₂), ... (x_k, y_k) such that the following conditions are met.

1 ≤ x_i < y_i ≤ n for all i between 1 and k, inclusive.
y_i < x_i+1 for all i between 1 and k-1, inclusive.
(x_i+1 + y_i+1) - (x_i + y_i) = c for all i between 1 and k-1, inclusive.

If a list of pairs satisfies all of the above conditions, the list is said to be stable. For any fixed n, c, and k, a stable list of k pairs is said to be maximal if its sum of elements (the sum of all 2k integers it contains) is the largest among all stable lists of k pairs.

For instance, consider n=5, c=4, and k=2. There are two stable lists of pairs: one is [(1, 2), (3, 4)] and the other is [(2, 3), (4, 5)]. The latter is the only maximal stable list of pairs in this example as its sum is (2+3+4+5) = 14.

Given n, c, and k, find one maximal stable list of pairs, and return a int[] that describes the list. Specifically, if (x₁, y₁), (x₂, y₂), ..., (x_k, y_k) is your maximal stable list of pairs, you must return { x₁, y₁, x₂, y₂, ..., x_k, y_k }.

If there are many maximal stable lists of pairs, you may return any one of them. If no stable list of pairs with the desired properties exists, you must return an empty int[].

Definition

Class:: StablePairsDiv1
Method:: findMaxStablePairs
Parameters:: int, int, int
Returns:: int[]
Method signature:: int[] findMaxStablePairs(int n, int c, int k)
(be sure your method is public)

Constraints

n will be between 1 and 100, inclusive.
c will be between 1 and 100, inclusive.
k will be between 1 and 100, inclusive.

Examples

5

4

2

Returns: {2, 3, 4, 5 }

This example was described in the problem statement.
4

4

2

Returns: {1, 2, 3, 4 }
1

100

1

Returns: { }

When n=1, regardless of c and k, there is no way to build a pair.
3

100

1

Returns: {2, 3 }

With k=1 we are looking for stable lists that only contain a single pair of numbers. There are three stable lists: [(1, 2)], [(1, 3)], and [(2, 3)]. Obviously, the last one is the only maximal one in this case.
10

6

3

Returns: {2, 5, 6, 7, 9, 10 }
12

7

3

Returns: {4, 5, 6, 10, 11, 12 }
76

78

49

Returns: { }
61

94

10

Returns: { }
70

23

17

Returns: { }
43

30

47

Returns: { }
60

86

22

Returns: { }
87

18

7

Returns: {32, 33, 41, 42, 50, 51, 59, 60, 68, 69, 77, 78, 86, 87 }
77

22

17

Returns: { }
67

15

6

Returns: {28, 30, 36, 37, 43, 45, 51, 52, 58, 60, 66, 67 }
83

8

21

Returns: {2, 3, 6, 7, 10, 11, 14, 15, 18, 19, 22, 23, 26, 27, 30, 31, 34, 35, 38, 39, 42, 43, 46, 47, 50, 51, 54, 55, 58, 59, 62, 63, 66, 67, 70, 71, 74, 75, 78, 79, 82, 83 }
95

6

22

Returns: {31, 32, 34, 35, 37, 38, 40, 41, 43, 44, 46, 47, 49, 50, 52, 53, 55, 56, 58, 59, 61, 62, 64, 65, 67, 68, 70, 71, 73, 74, 76, 77, 79, 80, 82, 83, 85, 86, 88, 89, 91, 92, 94, 95 }
100

48

3

Returns: {51, 52, 75, 76, 99, 100 }
63

10

9

Returns: {22, 23, 27, 28, 32, 33, 37, 38, 42, 43, 47, 48, 52, 53, 57, 58, 62, 63 }
92

4

26

Returns: {41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92 }
81

12

12

Returns: {14, 15, 20, 21, 26, 27, 32, 33, 38, 39, 44, 45, 50, 51, 56, 57, 62, 63, 68, 69, 74, 75, 80, 81 }
36

7

2

Returns: {31, 33, 35, 36 }
63

4

4

Returns: {56, 57, 58, 59, 60, 61, 62, 63 }
46

4

5

Returns: {37, 38, 39, 40, 41, 42, 43, 44, 45, 46 }
57

43

2

Returns: {34, 36, 56, 57 }
66

4

20

Returns: {27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66 }
73

5

15

Returns: {37, 38, 39, 41, 42, 43, 44, 46, 47, 48, 49, 51, 52, 53, 54, 56, 57, 58, 59, 61, 62, 63, 64, 66, 67, 68, 69, 71, 72, 73 }
75

7

16

Returns: {21, 23, 25, 26, 28, 30, 32, 33, 35, 37, 39, 40, 42, 44, 46, 47, 49, 51, 53, 54, 56, 58, 60, 61, 63, 65, 67, 68, 70, 72, 74, 75 }
56

4

2

Returns: {53, 54, 55, 56 }
64

48

3

Returns: {15, 16, 39, 40, 63, 64 }
88

9

16

Returns: {19, 21, 24, 25, 28, 30, 33, 34, 37, 39, 42, 43, 46, 48, 51, 52, 55, 57, 60, 61, 64, 66, 69, 70, 73, 75, 78, 79, 82, 84, 87, 88 }
50

30

3

Returns: {19, 20, 34, 35, 49, 50 }
66

12

8

Returns: {23, 24, 29, 30, 35, 36, 41, 42, 47, 48, 53, 54, 59, 60, 65, 66 }
85

21

8

Returns: {10, 12, 21, 22, 31, 33, 42, 43, 52, 54, 63, 64, 73, 75, 84, 85 }
35

33

3

Returns: {1, 2, 17, 19, 34, 35 }
98

96

3

Returns: {1, 2, 49, 50, 97, 98 }
21

13

4

Returns: { }
10

8

3

Returns: {1, 2, 5, 6, 9, 10 }
38

72

2

Returns: {1, 2, 37, 38 }
48

93

2

Returns: { }
69

27

6

Returns: { }
40

11

8

Returns: { }
95

11

18

Returns: { }
34

4

17

Returns: {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34 }
36

68

2

Returns: {1, 2, 35, 36 }
12

7

4

Returns: { }
34

8

9

Returns: {1, 2, 5, 6, 9, 10, 13, 14, 17, 18, 21, 22, 25, 26, 29, 30, 33, 34 }
29

7

7

Returns: {7, 8, 10, 12, 14, 15, 17, 19, 21, 22, 24, 26, 28, 29 }
39

10

2

Returns: {33, 34, 38, 39 }
56

6

7

Returns: {37, 38, 40, 41, 43, 44, 46, 47, 49, 50, 52, 53, 55, 56 }
53

14

8

Returns: {3, 4, 10, 11, 17, 18, 24, 25, 31, 32, 38, 39, 45, 46, 52, 53 }
41

5

5

Returns: {30, 31, 32, 34, 35, 36, 37, 39, 40, 41 }
34

7

8

Returns: {8, 10, 12, 13, 15, 17, 19, 20, 22, 24, 26, 27, 29, 31, 33, 34 }
37

6

2

Returns: {33, 34, 36, 37 }
39

12

3

Returns: {26, 27, 32, 33, 38, 39 }
54

12

6

Returns: {23, 24, 29, 30, 35, 36, 41, 42, 47, 48, 53, 54 }
42

5

16

Returns: {3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18, 20, 21, 22, 23, 25, 26, 27, 28, 30, 31, 32, 33, 35, 36, 37, 38, 40, 41, 42 }
69

6

13

Returns: {32, 33, 35, 36, 38, 39, 41, 42, 44, 45, 47, 48, 50, 51, 53, 54, 56, 57, 59, 60, 62, 63, 65, 66, 68, 69 }
58

7

16

Returns: {4, 6, 8, 9, 11, 13, 15, 16, 18, 20, 22, 23, 25, 27, 29, 30, 32, 34, 36, 37, 39, 41, 43, 44, 46, 48, 50, 51, 53, 55, 57, 58 }
75

11

10

Returns: {24, 26, 30, 31, 35, 37, 41, 42, 46, 48, 52, 53, 57, 59, 63, 64, 68, 70, 74, 75 }
66

6

18

Returns: {14, 15, 17, 18, 20, 21, 23, 24, 26, 27, 29, 30, 32, 33, 35, 36, 38, 39, 41, 42, 44, 45, 47, 48, 50, 51, 53, 54, 56, 57, 59, 60, 62, 63, 65, 66 }
65

9

10

Returns: {23, 25, 28, 29, 32, 34, 37, 38, 41, 43, 46, 47, 50, 52, 55, 56, 59, 61, 64, 65 }
68

13

10

Returns: {8, 10, 15, 16, 21, 23, 28, 29, 34, 36, 41, 42, 47, 49, 54, 55, 60, 62, 67, 68 }
64

10

13

Returns: {3, 4, 8, 9, 13, 14, 18, 19, 23, 24, 28, 29, 33, 34, 38, 39, 43, 44, 48, 49, 53, 54, 58, 59, 63, 64 }
62

7

14

Returns: {15, 17, 19, 20, 22, 24, 26, 27, 29, 31, 33, 34, 36, 38, 40, 41, 43, 45, 47, 48, 50, 52, 54, 55, 57, 59, 61, 62 }
60

8

13

Returns: {11, 12, 15, 16, 19, 20, 23, 24, 27, 28, 31, 32, 35, 36, 39, 40, 43, 44, 47, 48, 51, 52, 55, 56, 59, 60 }
66

10

12

Returns: {10, 11, 15, 16, 20, 21, 25, 26, 30, 31, 35, 36, 40, 41, 45, 46, 50, 51, 55, 56, 60, 61, 65, 66 }
96

10

16

Returns: {20, 21, 25, 26, 30, 31, 35, 36, 40, 41, 45, 46, 50, 51, 55, 56, 60, 61, 65, 66, 70, 71, 75, 76, 80, 81, 85, 86, 90, 91, 95, 96 }
100

7

20

Returns: {32, 34, 36, 37, 39, 41, 43, 44, 46, 48, 50, 51, 53, 55, 57, 58, 60, 62, 64, 65, 67, 69, 71, 72, 74, 76, 78, 79, 81, 83, 85, 86, 88, 90, 92, 93, 95, 97, 99, 100 }
97

7

25

Returns: {12, 13, 15, 17, 19, 20, 22, 24, 26, 27, 29, 31, 33, 34, 36, 38, 40, 41, 43, 45, 47, 48, 50, 52, 54, 55, 57, 59, 61, 62, 64, 66, 68, 69, 71, 73, 75, 76, 78, 80, 82, 83, 85, 87, 89, 90, 92, 94, 96, 97 }
93

9

19

Returns: {11, 12, 15, 17, 20, 21, 24, 26, 29, 30, 33, 35, 38, 39, 42, 44, 47, 48, 51, 53, 56, 57, 60, 62, 65, 66, 69, 71, 74, 75, 78, 80, 83, 84, 87, 89, 92, 93 }
93

6

28

Returns: {11, 12, 14, 15, 17, 18, 20, 21, 23, 24, 26, 27, 29, 30, 32, 33, 35, 36, 38, 39, 41, 42, 44, 45, 47, 48, 50, 51, 53, 54, 56, 57, 59, 60, 62, 63, 65, 66, 68, 69, 71, 72, 74, 75, 77, 78, 80, 81, 83, 84, 86, 87, 89, 90, 92, 93 }
100

6

19

Returns: {45, 46, 48, 49, 51, 52, 54, 55, 57, 58, 60, 61, 63, 64, 66, 67, 69, 70, 72, 73, 75, 76, 78, 79, 81, 82, 84, 85, 87, 88, 90, 91, 93, 94, 96, 97, 99, 100 }
99

8

20

Returns: {22, 23, 26, 27, 30, 31, 34, 35, 38, 39, 42, 43, 46, 47, 50, 51, 54, 55, 58, 59, 62, 63, 66, 67, 70, 71, 74, 75, 78, 79, 82, 83, 86, 87, 90, 91, 94, 95, 98, 99 }
98

8

15

Returns: {41, 42, 45, 46, 49, 50, 53, 54, 57, 58, 61, 62, 65, 66, 69, 70, 73, 74, 77, 78, 81, 82, 85, 86, 89, 90, 93, 94, 97, 98 }
92

8

19

Returns: {19, 20, 23, 24, 27, 28, 31, 32, 35, 36, 39, 40, 43, 44, 47, 48, 51, 52, 55, 56, 59, 60, 63, 64, 67, 68, 71, 72, 75, 76, 79, 80, 83, 84, 87, 88, 91, 92 }
90

7

25

Returns: {5, 6, 8, 10, 12, 13, 15, 17, 19, 20, 22, 24, 26, 27, 29, 31, 33, 34, 36, 38, 40, 41, 43, 45, 47, 48, 50, 52, 54, 55, 57, 59, 61, 62, 64, 66, 68, 69, 71, 73, 75, 76, 78, 80, 82, 83, 85, 87, 89, 90 }
100

6

16

Returns: {54, 55, 57, 58, 60, 61, 63, 64, 66, 67, 69, 70, 72, 73, 75, 76, 78, 79, 81, 82, 84, 85, 87, 88, 90, 91, 93, 94, 96, 97, 99, 100 }
90

11

17

Returns: {1, 2, 6, 8, 12, 13, 17, 19, 23, 24, 28, 30, 34, 35, 39, 41, 45, 46, 50, 52, 56, 57, 61, 63, 67, 68, 72, 74, 78, 79, 83, 85, 89, 90 }
97

10

20

Returns: {1, 2, 6, 7, 11, 12, 16, 17, 21, 22, 26, 27, 31, 32, 36, 37, 41, 42, 46, 47, 51, 52, 56, 57, 61, 62, 66, 67, 71, 72, 76, 77, 81, 82, 86, 87, 91, 92, 96, 97 }
94

8

24

Returns: {1, 2, 5, 6, 9, 10, 13, 14, 17, 18, 21, 22, 25, 26, 29, 30, 33, 34, 37, 38, 41, 42, 45, 46, 49, 50, 53, 54, 57, 58, 61, 62, 65, 66, 69, 70, 73, 74, 77, 78, 81, 82, 85, 86, 89, 90, 93, 94 }
92

12

16

Returns: {1, 2, 7, 8, 13, 14, 19, 20, 25, 26, 31, 32, 37, 38, 43, 44, 49, 50, 55, 56, 61, 62, 67, 68, 73, 74, 79, 80, 85, 86, 91, 92 }
98

8

25

Returns: {1, 2, 5, 6, 9, 10, 13, 14, 17, 18, 21, 22, 25, 26, 29, 30, 33, 34, 37, 38, 41, 42, 45, 46, 49, 50, 53, 54, 57, 58, 61, 62, 65, 66, 69, 70, 73, 74, 77, 78, 81, 82, 85, 86, 89, 90, 93, 94, 97, 98 }
100

7

29

Returns: {1, 2, 4, 6, 8, 9, 11, 13, 15, 16, 18, 20, 22, 23, 25, 27, 29, 30, 32, 34, 36, 37, 39, 41, 43, 44, 46, 48, 50, 51, 53, 55, 57, 58, 60, 62, 64, 65, 67, 69, 71, 72, 74, 76, 78, 79, 81, 83, 85, 86, 88, 90, 92, 93, 95, 97, 99, 100 }
95

6

32

Returns: {1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17, 19, 20, 22, 23, 25, 26, 28, 29, 31, 32, 34, 35, 37, 38, 40, 41, 43, 44, 46, 47, 49, 50, 52, 53, 55, 56, 58, 59, 61, 62, 64, 65, 67, 68, 70, 71, 73, 74, 76, 77, 79, 80, 82, 83, 85, 86, 88, 89, 91, 92, 94, 95 }
92

10

19

Returns: {1, 2, 6, 7, 11, 12, 16, 17, 21, 22, 26, 27, 31, 32, 36, 37, 41, 42, 46, 47, 51, 52, 56, 57, 61, 62, 66, 67, 71, 72, 76, 77, 81, 82, 86, 87, 91, 92 }
100

14

15

Returns: {1, 2, 8, 9, 15, 16, 22, 23, 29, 30, 36, 37, 43, 44, 50, 51, 57, 58, 64, 65, 71, 72, 78, 79, 85, 86, 92, 93, 99, 100 }
94

13

11

Returns: {28, 29, 34, 36, 41, 42, 47, 49, 54, 55, 60, 62, 67, 68, 73, 75, 80, 81, 86, 88, 93, 94 }
97

36

6

Returns: {6, 7, 24, 25, 42, 43, 60, 61, 78, 79, 96, 97 }
92

12

11

Returns: {31, 32, 37, 38, 43, 44, 49, 50, 55, 56, 61, 62, 67, 68, 73, 74, 79, 80, 85, 86, 91, 92 }
97

13

12

Returns: {24, 26, 31, 32, 37, 39, 44, 45, 50, 52, 57, 58, 63, 65, 70, 71, 76, 78, 83, 84, 89, 91, 96, 97 }
92

32

6

Returns: {11, 12, 27, 28, 43, 44, 59, 60, 75, 76, 91, 92 }
92

16

9

Returns: {27, 28, 35, 36, 43, 44, 51, 52, 59, 60, 67, 68, 75, 76, 83, 84, 91, 92 }
100

12

16

Returns: {9, 10, 15, 16, 21, 22, 27, 28, 33, 34, 39, 40, 45, 46, 51, 52, 57, 58, 63, 64, 69, 70, 75, 76, 81, 82, 87, 88, 93, 94, 99, 100 }
91

16

6

Returns: {50, 51, 58, 59, 66, 67, 74, 75, 82, 83, 90, 91 }
93

15

12

Returns: {9, 11, 17, 18, 24, 26, 32, 33, 39, 41, 47, 48, 54, 56, 62, 63, 69, 71, 77, 78, 84, 86, 92, 93 }
95

14

6

Returns: {59, 60, 66, 67, 73, 74, 80, 81, 87, 88, 94, 95 }
100

18

6

Returns: {54, 55, 63, 64, 72, 73, 81, 82, 90, 91, 99, 100 }
93

25

8

Returns: {4, 6, 17, 18, 29, 31, 42, 43, 54, 56, 67, 68, 79, 81, 92, 93 }
96

15

9

Returns: {35, 36, 42, 44, 50, 51, 57, 59, 65, 66, 72, 74, 80, 81, 87, 89, 95, 96 }
92

13

9

Returns: {39, 40, 45, 47, 52, 53, 58, 60, 65, 66, 71, 73, 78, 79, 84, 86, 91, 92 }
100

19

9

Returns: {23, 24, 32, 34, 42, 43, 51, 53, 61, 62, 70, 72, 80, 81, 89, 91, 99, 100 }
95

15

8

Returns: {41, 43, 49, 50, 56, 58, 64, 65, 71, 73, 79, 80, 86, 88, 94, 95 }
99

23

8

Returns: {17, 19, 29, 30, 40, 42, 52, 53, 63, 65, 75, 76, 86, 88, 98, 99 }
90

13

10

Returns: {30, 32, 37, 38, 43, 45, 50, 51, 56, 58, 63, 64, 69, 71, 76, 77, 82, 84, 89, 90 }
92

12

13

Returns: {19, 20, 25, 26, 31, 32, 37, 38, 43, 44, 49, 50, 55, 56, 61, 62, 67, 68, 73, 74, 79, 80, 85, 86, 91, 92 }
91

22

6

Returns: {35, 36, 46, 47, 57, 58, 68, 69, 79, 80, 90, 91 }
91

20

8

Returns: {20, 21, 30, 31, 40, 41, 50, 51, 60, 61, 70, 71, 80, 81, 90, 91 }
97

17

10

Returns: {19, 21, 28, 29, 36, 38, 45, 46, 53, 55, 62, 63, 70, 72, 79, 80, 87, 89, 96, 97 }
95

22

6

Returns: {39, 40, 50, 51, 61, 62, 72, 73, 83, 84, 94, 95 }
95

17

6

Returns: {51, 53, 60, 61, 68, 70, 77, 78, 85, 87, 94, 95 }
90

26

6

Returns: {24, 25, 37, 38, 50, 51, 63, 64, 76, 77, 89, 90 }
94

33

6

Returns: {10, 12, 27, 28, 43, 45, 60, 61, 76, 78, 93, 94 }
96

12

7

Returns: {59, 60, 65, 66, 71, 72, 77, 78, 83, 84, 89, 90, 95, 96 }
90

12

11

Returns: {29, 30, 35, 36, 41, 42, 47, 48, 53, 54, 59, 60, 65, 66, 71, 72, 77, 78, 83, 84, 89, 90 }
95

24

7

Returns: {22, 23, 34, 35, 46, 47, 58, 59, 70, 71, 82, 83, 94, 95 }
98

16

10

Returns: {25, 26, 33, 34, 41, 42, 49, 50, 57, 58, 65, 66, 73, 74, 81, 82, 89, 90, 97, 98 }
100

1

1

Returns: {99, 100 }
100

3

2

Returns: { }
100

5

40

Returns: {1, 3, 4, 5, 6, 8, 9, 10, 11, 13, 14, 15, 16, 18, 19, 20, 21, 23, 24, 25, 26, 28, 29, 30, 31, 33, 34, 35, 36, 38, 39, 40, 41, 43, 44, 45, 46, 48, 49, 50, 51, 53, 54, 55, 56, 58, 59, 60, 61, 63, 64, 65, 66, 68, 69, 70, 71, 73, 74, 75, 76, 78, 79, 80, 81, 83, 84, 85, 86, 88, 89, 90, 91, 93, 94, 95, 96, 98, 99, 100 }
20

1

1

Returns: {19, 20 }
2

1

1

Returns: {1, 2 }
10

1

4

Returns: { }
6

1

1

Returns: {5, 6 }
100

2

1

Returns: {99, 100 }
12

2

3

Returns: { }
4

4

4

Returns: { }
100

3

1

Returns: {99, 100 }
10

2

1

Returns: {9, 10 }
2

2

1

Returns: {1, 2 }
50

3

5

Returns: { }
2

3

5

Returns: { }
2

100

1

Returns: {1, 2 }
50

3

8

Returns: { }
4

3

2

Returns: { }
7

3

2

Returns: { }
5

1

1

Returns: {4, 5 }
5

5

2

Returns: {1, 3, 4, 5 }
100

3

3

Returns: { }
30

1

5

Returns: { }
64

2

18

Returns: { }
100

4

100

Returns: { }
50

1

5

Returns: { }
67

1

45

Returns: { }
100

5

3

Returns: {94, 95, 96, 98, 99, 100 }
15

1

3

Returns: { }
8

1

2

Returns: { }
100

7

4

Returns: {88, 90, 92, 93, 95, 97, 99, 100 }
10

10

1

Returns: {9, 10 }
10

5

2

Returns: {6, 8, 9, 10 }
90

100

2

Returns: {39, 40, 89, 90 }
100

19

5

Returns: {61, 62, 70, 72, 80, 81, 89, 91, 99, 100 }
5

6

2

Returns: {1, 2, 4, 5 }
10

3

2

Returns: { }
5

5

5

Returns: { }
100

100

1

Returns: {99, 100 }
100

1

2

Returns: { }
100

1

3

Returns: { }
1

1

1

Returns: { }
30

1

1

Returns: {29, 30 }
5

2

2

Returns: { }
4

2

2

Returns: { }
3

3

1

Returns: {2, 3 }
10

1

2

Returns: { }
6

7

2

Returns: {1, 3, 5, 6 }
100

2

2

Returns: { }
50

3

10

Returns: { }
31

19

4

Returns: {1, 3, 11, 12, 20, 22, 30, 31 }
6

2

2

Returns: { }
10

1

1

Returns: {9, 10 }
100

2

5

Returns: { }
20

7

4

Returns: {8, 10, 12, 13, 15, 17, 19, 20 }

Statistics

Problem Statement for "StablePairsDiv1"

Problem Statement

Definition

Constraints

Examples