blob: eb36ae9ca7b4466de33d6b8ad48a3b3de593a430 (
plain)
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
|
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.ArrayList;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class day02 {
public static void main(String args[]) throws IOException {
RandomAccessFile input = new RandomAccessFile("input", "r");
System.out.println("Day 02 Part 1: " + part1(input));
input.seek(0);
System.out.println("Day 02 Part 2: " + part2(input));
input.close();
}
public static String part1(RandomAccessFile input) throws IOException {
int tot = 0;
String line;
while ((line = input.readLine()) != null) {
tot += gamePossible(line);
}
return Integer.toString(tot);
}
private static int gamePossible(String line) {
Pattern idpat = Pattern.compile("Game (\\d+):");
Pattern gamepat = Pattern.compile("(\\d+) (red|green|blue)(, (\\d+) (red|green|blue))*(;|\\Z)");
Pattern drawpat = Pattern.compile("(\\d+) (red|green|blue)");
Matcher idmat = idpat.matcher(line);
idmat.find();
int id = Integer.parseInt(idmat.group(1));
boolean valid = true;
Matcher gamemat = gamepat.matcher(line);
while (gamemat.find()) {
Matcher drawmat = drawpat.matcher(line.substring(gamemat.start(), gamemat.end()));
while (drawmat.find()) {
int num = Integer.parseInt(drawmat.group(1));
switch (drawmat.group(2)) {
case "red":
if (num > 12) {
valid = false;
}
break;
case "green":
if (num > 13) {
valid = false;
}
break;
case "blue":
if (num > 14) {
valid = false;
}
}
}
}
return valid ? id : 0;
}
public static String part2(RandomAccessFile input) throws IOException {
int tot = 0;
String line;
while ((line = input.readLine()) != null) {
tot += gamePower(line);
}
return Integer.toString(tot);
}
private static int gamePower(String line) {
Pattern idpat = Pattern.compile("Game (\\d+):");
Pattern gamepat = Pattern.compile("(\\d+) (red|green|blue)(, (\\d+) (red|green|blue))*(;|\\Z)");
Pattern drawpat = Pattern.compile("(\\d+) (red|green|blue)");
Matcher idmat = idpat.matcher(line);
idmat.find();
int id = Integer.parseInt(idmat.group(1));
int red = 0, green = 0, blue = 0;
Matcher gamemat = gamepat.matcher(line);
while (gamemat.find()) {
Matcher drawmat = drawpat.matcher(line.substring(gamemat.start(), gamemat.end()));
while (drawmat.find()) {
int num = Integer.parseInt(drawmat.group(1));
switch (drawmat.group(2)) {
case "red":
if (num > red) {
red = num;
}
break;
case "green":
if (num > green) {
green = num;
}
break;
case "blue":
if (num > blue) {
blue = num;
}
}
}
}
return red * blue * green;
}
}
|
