eldridge.cam
Advent of Code solutions
fixing 2021
+1
-3
2021/1/p1.cpp
+1
-3
2021/1/p1.cpp
···
1
1
#include <iostream>
2
-
#include <fstream>
3
2
4
3
using namespace std;
5
4
6
5
int main() {
7
-
ifstream input("input");
8
6
int previous = 2147483647, current = 0;
9
7
int total = 0;
10
8
11
-
while (input >> current) {
9
+
while (cin >> current) {
12
10
if (current > previous) {
13
11
total++;
14
12
}
+1
-2
2021/1/p2.cpp
+1
-2
2021/1/p2.cpp
+1
-5
2021/2/p1.pl
+1
-5
2021/2/p1.pl
+1
-5
2021/2/p2.pl
+1
-5
2021/2/p2.pl
+6
-4
2021/3/p1.rb
+6
-4
2021/3/p1.rb
···
1
-
counts = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
1
+
counts = []
2
2
3
-
File.readlines("input").each do |line|
3
+
lines = ARGF.readlines()
4
+
lines.each do |line|
4
5
line.chomp.chars.each_with_index do |char, i|
6
+
counts[i] ||= 0
5
7
counts[i] += 1 if char == "1"
6
8
end
7
9
end
···
12
14
return binary
13
15
end
14
16
15
-
gamma = counts.map { |n| n > 500 }.reduce(0, &method(:from_binary))
16
-
epsilon = counts.map { |n| n < 500 }.reduce(0, &method(:from_binary))
17
+
gamma = counts.map { |n| n >= lines.length / 2 }.reduce(0, &method(:from_binary))
18
+
epsilon = counts.map { |n| n < lines.length / 2 }.reduce(0, &method(:from_binary))
17
19
18
20
puts gamma * epsilon
+4
-3
2021/3/p2.rb
+4
-3
2021/3/p2.rb
···
1
-
lines = File.readlines("input").map { |l| l.chomp }
1
+
lines = ARGF.readlines().map { |l| l.chomp }
2
2
3
3
def count lines, i
4
4
return lines
···
8
8
9
9
oxygen = lines
10
10
12.times do |i|
11
-
c = count(oxygen, i) >= oxygen.length / 2 ? "1" : "0"
11
+
c = count(oxygen, i) >= oxygen.length / 2.0 ? "1" : "0"
12
12
oxygen = oxygen.filter { |line| line[i] == c }
13
13
break if oxygen.length == 1
14
14
end
15
15
16
16
carbon = lines
17
17
12.times do |i|
18
-
c = count(carbon, i) >= carbon.length / 2 ? "0" : "1"
18
+
c = count(carbon, i) >= carbon.length / 2.0 ? "0" : "1"
19
19
carbon = carbon.filter { |line| line[i] == c }
20
20
break if carbon.length == 1
21
21
end
22
+
22
23
23
24
puts(oxygen.first.to_i(2) * carbon.first.to_i(2))
+1
-3
2021/4/p1.pl
+1
-3
2021/4/p1.pl
···
96
96
parse_boards(Rest, Boards).
97
97
98
98
input(Calls, Boards) :-
99
-
open("input", read, Fd),
100
-
read_stream_to_codes(Fd, Contents),
101
-
close(Fd),
99
+
read_stream_to_codes(user_input, Contents),
102
100
split_string(Contents, "\n", " ", [CallStr | BoardStr]),
103
101
split_string(CallStr, ",", " ", CallStrs),
104
102
convert_all(CallStrs, Calls),
+1
-3
2021/4/p2.pl
+1
-3
2021/4/p2.pl
···
96
96
parse_boards(Rest, Boards).
97
97
98
98
input(Calls, Boards) :-
99
-
open("input", read, Fd),
100
-
read_stream_to_codes(Fd, Contents),
101
-
close(Fd),
99
+
read_stream_to_codes(user_input, Contents),
102
100
split_string(Contents, "\n", " ", [CallStr | BoardStr]),
103
101
split_string(CallStr, ",", " ", CallStrs),
104
102
convert_all(CallStrs, Calls),
+2
-2
Justfile
+2
-2
Justfile
···
11
11
12
12
default_year := if current_year != "" { current_year } else { env_year }
13
13
14
-
p1 input="input": (part "p1")
15
-
p2 input="input": (part "p2")
14
+
p1 input="input": (part "p1" current_day current_year input)
15
+
p2 input="input": (part "p2" current_day current_year input)
16
16
compile part: (_compile current_year current_day part)
17
17
run part input="input": (_run current_year current_day part input)
18
18