82b.html

<script>

// Day 2
// =====

/**
 * Check if a-b is contained in c-d or vice versa.
 * 
 * a-b is contained in c-d if:
 * a-c <= 0 && b-d <= 0
 * 
 * similarily, c-d is contained in a-b if:
 * c-a <= 0 && d-b <= 0 => a-c >= 0 && b-d >= 0
 * 
 * so the pairs are contained if the difference between their min and between their max have the same sign.
 * 
 * so if (a-c <= 0 && b-d <= 0) || (c-a <= 0 && d-b <= 0)
 * which is the same as (a-c)*(b-d) <= 0
 */

// A: Golf starts here:
a=i=>i.split`
`.reduce((a,b)=>a+(((x=(b.split(/,|-/)))[0]-x[2])*(x[1]-x[3])<=0),0)
// Golf ends here

// A: Expected value: 483
i = 
`16-80,80-87
4-9,10-97
6-94,93-93
31-73,8-73
4-72,5-73
6-63,4-5
3-44,4-45
89-96,95-95
56-95,29-95
5-22,5-22
49-63,48-63
97-97,2-98
1-13,3-63
63-93,64-94
41-63,64-76
24-45,46-72
28-94,29-78
18-36,35-37
83-85,8-84
22-35,21-22
18-48,18-18
98-98,1-99
88-94,94-96
21-93,74-93
63-83,62-82
89-90,15-90
63-80,61-79
12-14,19-63
30-30,31-78
7-88,87-88
27-41,27-27
6-35,6-36
3-78,77-79
4-67,22-57
19-82,65-87
3-93,6-46
18-30,31-41
14-95,13-94
33-59,17-33
37-38,38-96
1-5,4-90
64-79,39-84
59-62,1-37
15-29,2-9
38-44,37-43
8-75,9-54
77-89,7-77
2-87,2-86
7-81,6-6
59-94,93-93
27-75,9-27
24-76,23-75
2-10,28-63
60-61,17-60
76-76,2-75
12-60,13-61
39-96,95-95
31-88,88-94
6-79,35-66
51-93,58-94
40-74,23-40
12-62,13-65
30-49,49-69
36-98,10-98
29-95,9-95
8-79,79-86
1-73,2-19
8-15,14-16
6-34,1-5
38-58,37-59
58-84,62-84
26-26,25-27
5-89,47-88
36-50,34-49
59-94,58-95
67-71,68-70
3-64,3-65
65-93,94-94
38-91,75-95
97-97,6-98
32-78,33-79
20-89,19-90
34-95,35-95
3-99,2-97
29-90,89-89
31-48,32-49
63-81,51-72
6-96,98-99
8-94,27-94
7-99,3-99
19-90,18-91
28-97,27-88
76-86,40-75
7-65,6-8
2-12,13-26
83-88,60-86
54-99,54-97
6-7,6-97
11-78,77-77
3-99,3-99
21-21,21-88
11-20,2-50
53-88,89-98
52-97,52-98
8-29,4-32
88-89,6-89
7-62,6-7
89-98,8-89
32-91,3-91
39-49,48-50
8-63,9-64
23-80,22-79
44-66,16-65
44-58,38-58
71-98,70-97
4-99,5-99
8-90,5-73
51-98,77-96
26-89,25-25
8-25,14-65
39-64,45-65
30-94,59-92
37-96,3-38
45-72,22-44
2-95,98-98
35-35,34-34
16-82,14-44
66-79,65-78
71-72,72-94
14-21,13-20
14-92,1-14
24-69,68-88
21-80,79-81
56-86,69-85
48-85,49-85
47-90,90-91
7-22,11-27
97-98,24-92
7-91,90-91
46-58,58-69
83-92,91-98
27-66,27-66
13-92,12-97
84-86,17-79
55-91,54-56
2-87,2-88
46-46,46-78
97-97,92-98
24-47,25-46
4-22,21-27
76-87,11-77
17-87,16-18
50-81,49-87
93-98,29-93
19-44,20-43
18-53,53-57
9-45,9-46
7-55,33-55
22-25,25-81
96-96,75-97
9-11,10-99
27-73,72-74
10-72,71-71
65-66,64-66
27-81,86-96
33-37,37-68
26-90,46-90
1-4,4-97
9-95,10-95
6-32,7-72
68-89,12-95
2-98,13-99
89-91,55-90
7-23,22-67
11-11,11-68
86-90,72-91
33-53,29-29
80-91,6-80
15-87,27-73
1-99,1-99
68-69,64-95
17-62,45-61
7-26,26-30
64-96,95-97
17-18,18-58
20-97,98-98
4-87,5-87
15-19,18-19
66-67,23-66
13-95,9-94
14-81,82-85
12-85,8-85
4-91,3-4
98-99,31-95
3-77,2-76
15-97,5-15
45-72,71-73
3-70,2-4
81-97,18-95
68-83,17-84
1-3,4-77
33-92,91-91
31-91,30-32
45-64,46-65
23-94,89-95
5-76,5-58
5-86,3-86
31-69,8-69
66-69,66-68
50-64,63-64
1-97,99-99
76-77,75-80
90-97,88-97
22-52,11-30
40-70,40-98
2-96,42-99
4-49,1-59
20-75,74-76
23-52,42-66
3-94,92-96
4-93,2-3
4-92,3-92
57-75,70-76
4-95,2-5
1-41,2-8
94-99,2-81
45-63,10-63
3-8,9-45
17-50,17-49
43-76,42-76
2-86,85-87
27-29,28-42
74-80,37-53
19-97,13-99
9-31,9-31
37-39,38-59
26-79,15-91
85-85,31-86
99-99,5-96
10-39,9-16
22-60,22-59
13-95,1-12
91-93,23-93
77-98,19-78
53-93,93-98
78-80,27-79
23-25,23-24
12-62,11-13
4-48,1-73
6-63,6-63
35-86,34-36
5-27,4-27
23-73,5-83
28-34,21-38
36-93,93-97
16-84,17-84
12-99,11-80
33-81,20-32
76-93,50-98
30-82,33-93
1-99,1-99
61-68,32-67
20-84,20-83
7-13,6-13
51-52,7-52
27-67,65-65
1-91,90-91
81-98,86-98
93-97,48-93
4-53,5-53
68-76,18-74
5-21,1-6
19-97,18-98
2-65,2-66
4-72,4-73
5-92,65-75
9-77,23-76
17-89,17-89
57-60,55-59
2-90,1-1
28-81,28-81
34-56,48-85
2-97,97-99
42-43,43-99
17-60,15-19
62-99,6-62
32-41,25-44
4-37,7-36
22-72,71-73
24-32,24-33
44-78,44-44
1-32,32-65
47-95,14-95
47-77,46-56
5-97,3-99
20-99,21-98
9-65,8-65
88-96,23-96
15-64,9-64
1-24,25-64
71-91,90-91
51-52,39-53
10-57,9-19
8-86,7-87
3-7,8-78
13-17,16-49
6-90,7-72
6-86,4-85
17-93,16-94
7-83,82-83
33-81,32-62
13-99,19-99
26-98,88-96
48-98,97-98
36-50,49-50
1-75,74-75
15-95,2-15
51-58,16-51
1-98,6-98
2-99,10-90
13-97,96-96
50-70,43-70
15-33,14-16
8-89,7-44
44-91,40-44
93-94,2-96
4-88,5-89
15-73,73-74
96-97,97-98
39-57,56-85
65-67,47-66
26-27,27-78
57-80,57-80
97-99,2-98
18-18,18-18
27-47,27-48
86-93,90-97
19-47,10-48
62-78,28-78
93-99,3-93
55-59,55-78
98-99,89-91
34-35,7-35
78-88,21-79
26-92,15-33
57-64,38-57
47-92,91-91
14-38,13-13
96-99,40-96
55-84,25-82
56-76,73-86
10-82,26-81
30-89,31-89
24-68,25-68
11-44,12-45
33-49,11-49
58-58,18-57
23-84,23-85
3-31,2-2
50-96,41-96
5-98,1-6
10-97,11-97
36-91,38-91
9-88,20-87
6-96,6-97
28-87,74-87
6-77,1-78
6-73,6-74
66-93,18-85
5-80,66-80
12-95,8-95
68-89,18-68
6-15,14-16
4-87,4-88
50-50,24-54
96-97,3-96
3-46,12-50
77-87,29-34
32-53,52-91
10-68,5-68
40-54,47-54
8-22,9-16
96-99,2-97
10-63,6-9
22-65,64-65
88-89,87-90
15-99,98-98
89-89,66-90
9-65,4-10
36-61,39-39
78-99,70-78
85-87,86-97
3-73,67-82
3-68,68-69
14-15,15-90
42-59,43-59
15-60,3-4
25-92,29-79
19-99,18-18
3-88,10-76
61-98,97-98
2-92,1-7
24-86,17-24
82-82,3-83
23-25,20-26
4-65,1-66
68-72,34-76
24-93,25-94
17-47,18-48
30-65,30-65
71-77,75-76
24-64,58-88
4-30,31-31
4-65,5-66
12-65,64-64
52-52,51-81
67-69,2-68
6-81,8-81
53-88,52-53
70-98,69-98
13-15,14-79
15-71,14-86
31-65,31-64
59-86,5-86
8-9,8-15
94-96,63-78
28-49,27-82
3-3,3-95
74-74,75-96
82-96,97-97
18-83,6-98
1-74,3-41
25-87,24-88
42-96,95-96
25-89,26-35
35-61,35-61
20-39,22-35
4-65,3-5
48-97,46-67
37-73,38-73
42-45,42-43
54-85,84-85
23-61,20-23
23-60,22-28
41-63,23-41
68-90,69-89
12-97,2-33
8-83,25-83
6-12,5-15
37-67,31-68
1-2,5-81
63-89,62-62
63-90,4-63
8-95,1-7
47-72,41-44
93-94,19-81
86-88,25-87
57-57,57-88
13-94,13-93
16-17,15-16
61-80,58-81
4-96,3-4
12-28,31-54
57-96,56-57
16-89,17-19
71-87,70-90
79-93,78-92
31-38,32-70
16-17,17-75
76-92,91-95
77-77,56-76
63-90,62-66
6-86,2-81
3-42,4-41
38-94,93-98
52-60,52-61
17-84,16-84
5-5,13-90
25-25,25-39
22-91,22-90
11-76,10-11
9-45,2-45
70-77,69-76
6-10,5-7
36-36,37-42
12-96,54-98
2-96,1-1
2-94,5-94
32-84,83-88
84-84,84-96
17-54,53-54
1-68,14-69
9-98,8-97
1-88,85-94
40-69,39-39
5-21,21-76
27-28,5-28
2-80,2-81
15-96,9-15
87-89,2-89
19-84,33-92
32-95,11-95
38-53,17-37
67-89,67-90
4-5,5-60
45-84,83-88
9-32,77-86
45-72,16-65
23-24,23-92
8-93,92-92
7-91,7-90
45-48,47-78
58-58,4-59
86-91,13-87
79-85,28-79
12-13,10-16
62-99,98-98
25-96,25-96
16-57,56-79
38-77,38-76
82-97,68-83
7-66,56-63
5-7,6-95
15-93,8-15
9-93,10-93
74-90,51-91
69-75,63-80
4-11,10-91
36-99,33-53
8-8,9-95
94-96,95-96
1-38,37-38
66-77,67-78
65-87,87-95
35-37,36-48
55-92,54-93
20-21,19-21
76-76,77-98
39-69,44-57
6-26,25-54
18-37,36-37
34-74,45-57
60-83,98-99
92-94,3-93
13-59,12-72
48-98,6-87
17-88,8-87
24-92,23-93
98-98,4-94
11-57,8-8
65-87,12-87
25-99,25-98
18-88,18-87
34-80,33-79
45-96,5-97
33-67,20-33
2-98,97-98
32-33,33-90
85-90,85-91
94-94,38-95
93-93,42-92
38-48,13-78
3-95,25-89
17-93,16-16
57-70,39-53
11-61,7-10
39-89,6-39
7-17,16-97
30-95,56-94
2-8,8-23
4-17,17-45
77-82,73-77
21-84,8-29
35-91,81-97
5-54,3-9
1-94,2-95
7-66,67-96
21-45,15-22
6-45,11-44
52-87,29-51
15-82,46-81
74-76,45-75
95-99,20-93
40-89,24-52
20-99,20-99
5-34,35-97
27-45,44-62
8-75,2-8
50-55,43-49
15-50,19-50
13-71,10-71
45-64,44-45
88-92,47-88
33-68,33-52
39-79,31-88
31-58,95-97
22-31,2-31
36-88,37-89
45-93,44-92
6-97,96-98
34-72,10-82
54-58,31-58
96-98,6-96
45-46,46-96
56-69,55-68
14-54,13-53
25-45,18-81
54-55,40-55
94-98,72-94
7-91,6-92
69-96,68-95
42-82,41-46
64-94,13-91
52-80,52-81
39-69,15-73
32-53,33-52
11-22,11-21
15-79,14-69
44-65,51-66
1-32,4-26
36-36,6-35
65-71,65-72
49-74,23-74
27-96,74-96
12-70,13-71
64-66,7-66
17-97,18-99
30-30,31-95
94-96,90-94
1-15,15-15
11-45,7-10
14-93,15-93
19-47,20-44
9-97,8-98
6-62,61-63
21-51,50-63
4-95,2-95
54-55,55-58
4-62,4-63
18-88,18-87
4-79,5-79
92-97,10-93
9-79,20-78
44-87,26-91
7-51,10-51
43-92,62-95
16-44,16-45
5-98,4-99
20-64,19-63
2-20,1-19
12-96,12-95
13-94,95-95
16-46,8-87
5-24,25-54
4-12,6-18
32-66,31-37
24-76,56-96
5-51,4-51
55-60,54-55
11-74,6-7
6-99,53-68
15-90,88-91
27-84,28-83
14-67,3-98
41-56,30-54
29-52,29-51
83-89,12-85
47-76,40-64
18-70,18-18
5-20,6-21
26-53,25-53
36-48,49-92
48-80,47-48
51-63,17-58
9-79,47-80
38-39,7-39
38-58,23-51
19-37,36-37
1-61,1-60
9-65,8-65
15-17,16-95
50-66,50-79
18-39,17-18
7-14,13-98
5-80,5-80
12-98,12-12
5-6,6-99
72-91,24-95
46-92,20-96
27-73,26-49
7-52,52-98
20-57,2-56
1-69,6-68
52-95,53-95
58-71,58-65
20-86,20-86
50-71,49-49
9-79,8-78
45-62,25-45
15-23,18-24
4-96,4-95
13-97,12-97
1-99,15-96
52-54,53-54
7-10,9-42
12-79,11-78
1-88,1-89
23-95,24-94
5-96,5-96
27-73,64-73
31-97,74-97
6-74,74-90
29-91,14-30
16-36,7-37
70-83,69-82
58-96,30-97
9-89,51-64
63-88,87-99
9-22,9-21
25-99,22-22
60-60,21-61
31-83,32-88
31-65,64-97
9-9,9-91
10-47,9-21
14-97,60-83
5-74,5-73
4-7,6-89
1-94,50-92
12-69,11-12
75-84,80-85
27-38,18-39
11-27,4-12
93-96,5-93
56-88,88-97
45-99,20-95
21-93,94-94
16-96,15-16
86-92,6-84
10-63,3-7
23-59,58-69
10-13,12-12
15-97,14-86
15-98,4-50
30-30,22-29
44-58,45-58
85-87,42-86
58-59,16-59
14-63,8-14
48-64,48-64
1-34,1-33
75-99,76-98
8-60,1-8
3-8,7-9
22-70,1-71
38-93,93-99
91-93,62-92
95-95,6-96
4-92,4-92
35-99,36-84
53-94,51-51
27-93,27-94
3-5,4-55
88-94,44-94
79-95,85-94
11-23,23-46
62-88,89-89
1-84,1-85
84-86,85-89
1-99,1-99
64-81,46-64
25-26,25-31
17-92,3-4
7-51,16-24
17-97,85-99
5-5,6-91
73-91,90-91
18-65,49-64
1-93,92-92
5-97,96-97
7-14,13-14
42-73,42-86
40-48,34-48
22-94,21-93
5-71,70-70
74-92,11-91
90-92,5-91
53-58,16-59
20-78,8-78
3-5,4-4
48-50,49-95
71-88,44-45
30-39,7-30
11-69,40-69
7-85,82-90
75-79,53-67
6-84,83-83
86-95,88-96
3-46,2-47
3-86,86-94
50-98,46-50
24-45,23-24
44-52,4-91
38-67,67-99
70-93,34-94
40-86,40-40
5-71,9-58
31-71,31-70
11-50,49-64
34-39,35-45
45-72,38-44
68-73,72-72
63-64,15-64
91-91,31-90
15-86,10-85
6-17,7-8
7-96,53-99
88-88,28-89
22-65,18-22
13-95,99-99
23-99,22-99
55-62,33-55
8-85,47-84
13-81,14-22
7-90,92-99
11-47,13-77
38-64,20-65
58-61,2-62
19-27,11-27
30-43,29-34
74-95,93-95
66-76,62-87
88-88,89-89
45-80,45-80
31-76,31-87
37-84,37-37
81-81,66-80
41-85,19-42
19-47,5-18
50-75,25-75
91-92,46-91
65-84,3-47
32-34,32-33
36-60,5-61
11-98,12-99
27-74,27-74
4-41,31-93
46-76,45-74
12-38,26-38
5-80,5-80
5-99,6-99
49-90,49-49
5-85,1-4
3-99,4-28
21-39,1-21
46-86,45-69
73-92,73-91
2-97,45-97
1-81,3-60
44-78,17-78
11-78,77-79
18-51,52-75
20-82,20-82
43-55,4-43
2-33,3-33
11-16,4-10
26-34,27-34
85-94,93-93
20-30,13-31
42-90,42-89
30-45,46-93
5-99,4-95
51-51,51-52
95-96,38-96
20-72,19-98
31-86,30-86
42-82,43-83
15-89,21-90
5-98,5-98
7-96,37-98
28-29,28-62
4-89,36-89
2-98,71-97
28-90,8-17
72-73,45-73
95-96,82-96
4-60,59-77
20-63,64-64
2-24,2-46
26-67,26-68
52-53,32-53
24-99,79-88
60-62,23-61
2-96,3-97
13-92,29-71
1-2,1-85
9-77,44-99
1-96,3-96
1-68,4-67
52-60,12-61
10-90,10-90
66-69,41-69
99-99,35-97
15-95,14-95
93-95,80-92
7-41,8-42
1-94,95-95
3-32,1-32
80-83,17-84
53-69,68-91
86-90,2-87
73-87,28-86
8-35,7-34
74-88,36-74
45-45,44-68
67-88,9-66
54-90,29-91
13-45,44-94
70-71,24-71
82-96,81-97
43-73,42-73
8-45,39-44
5-42,6-43
54-93,5-55
75-96,75-96
11-31,3-7
82-90,81-82
33-77,54-57
77-79,73-79
34-90,33-56
4-13,13-49
3-19,18-97
3-97,2-99
28-51,19-29
77-78,5-94
9-11,10-11
51-69,51-68
34-73,46-52
25-96,96-98
1-55,2-55
20-81,26-70
91-97,79-92
22-74,9-22
3-97,2-3
39-94,32-93
66-95,96-97
10-10,9-11
30-65,21-40
2-94,4-93
1-91,2-90
31-84,84-99
82-95,6-75
67-91,90-91
12-12,12-97
7-75,6-7
28-28,14-27
45-50,35-49
43-72,71-73
59-73,21-73
58-75,39-82
96-97,96-98
97-97,2-98
6-92,3-7
84-86,27-85
39-95,31-45
27-84,43-95
48-95,33-95
47-55,46-48
42-82,41-69
12-96,13-98
6-99,1-4
62-94,62-94
64-82,4-83
73-75,10-74
11-24,10-12
23-54,7-23
48-53,18-69
7-11,10-11
87-87,11-88
50-79,78-78
4-52,51-53
81-82,39-82
94-97,1-95
15-75,33-75
40-52,33-38
34-71,70-71
37-38,38-66
7-43,5-6
11-20,10-31
19-98,1-4
19-87,18-88
94-95,18-95
5-13,7-98
45-73,32-45
18-95,94-94
37-95,94-95
41-42,26-43
18-92,19-92
70-90,19-79
16-95,15-96`

console.log(a(i));

</script>