-
Notifications
You must be signed in to change notification settings - Fork 0
/
Day4.java
151 lines (121 loc) · 4.01 KB
/
Day4.java
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
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
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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
package io.github.sirnikolai.days;
import io.github.sirnikolai.AbstractSolution;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class Day4 extends AbstractSolution {
Set<String> targetFields = new HashSet<>();
{
String split = "byr\n" +
"iyr\n" +
"eyr\n" +
"hgt\n" +
"hcl\n" +
"ecl\n" +
"pid\n" +
"cid";
targetFields.addAll(Arrays.asList(split.split("\n")));
}
@Override
public void Part1(String input) {
String[] split = input.split("\n\n");
int valid = 0;
for(String s : split) {
s = s.replace("\n", " ");
if(isValid(s)) {
valid++;
}
}
System.out.println(valid);
}
private boolean isValid(String cred) {
String[] split = cred.split(" ");
Set<String> set = new HashSet<>();
for(String s : split) {
if(targetFields.contains(s.split(":")[0])) {
set.add(s.split(":")[0]);
}
}
if(targetFields.size() - set.size() == 1) {
if(!set.contains("cid"))
return true;
return false;
}
return targetFields.size() == set.size();
}
@Override
public void Part2(String input) {
String[] split = input.split("\n\n");
int valid = 0;
for(String s : split) {
s = s.replace("\n", " ");
if(isValid2(s)) {
valid++;
}
}
System.out.println(valid);
}
private boolean isValid2(String cred) {
if(!isValid(cred)) {
return false;
}
String[] split = cred.split(" ");
for(String s : split) {
String[] sub = s.split(":");
switch (sub[0]) {
case "byr": {
int i = Integer.parseInt(sub[1]);
if (i < 1920 || i > 2002)
return false;
break;
}
case "iyr": {
int i = Integer.parseInt(sub[1]);
if (i < 2010 || i > 2020)
return false;
break;
}
case "hgt":
if (sub[1].endsWith("cm")) {
int i = Integer.parseInt(sub[1].substring(0, sub[1].indexOf("cm")));
if (i < 150 || i > 193)
return false;
} else if (sub[1].endsWith("in")) {
int i = Integer.parseInt(sub[1].substring(0, sub[1].indexOf("in")));
if (i < 59 || i > 76)
return false;
} else {
return false;
}
break;
case "hcl":
if (sub[1].length() != 7)
return false;
for (int i = 1; i < sub[1].length(); i++) {
if (!Character.isLetterOrDigit(sub[1].charAt(i)))
return false;
}
break;
case "ecl":
if (!(new HashSet<>(Arrays.asList("amb", "blu", "brn", "gry", "grn", "hzl", "oth")).contains(sub[1])))
return false;
break;
case "pid":
if (sub[1].length() != 9)
return false;
for (char c : sub[1].toCharArray()) {
if (!Character.isDigit(c))
return false;
}
break;
case "eyr": {
int i = Integer.parseInt(sub[1]);
if (i < 2020 || i > 2030)
return false;
break;
}
}
}
return true;
}
}