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using System; | |
using System.Linq; | |
using System.Collections.Generic; | |
namespace Day10 | |
{ | |
class Program | |
{ | |
static void Main(string[] args) | |
{ | |
List<char[]> Instructions = new List<char[]>(); | |
List<int> ErrorScoresPart1 = new List<int>(); | |
List<long> ErrorScoresPart2 = new List<long>(); | |
Dictionary<char, char> Delimiters = new Dictionary<char, char>() { | |
{ '>', '<' }, | |
{ ')', '(' }, | |
{ ']', '[' }, | |
{ '}', '{' } | |
}; | |
foreach (String line in System.IO.File.ReadLines(@"c:\Temp\day10.txt")) | |
{ | |
Instructions.Add(line.ToCharArray()); | |
} | |
List<char[]> IncompleteLines = new List<char[]>(); | |
foreach (char[] Instruction in Instructions) | |
{ | |
Stack<char> InstructionStack = new Stack<char>(); | |
bool isIncorrect = false; | |
foreach (char c in Instruction) | |
{ | |
isIncorrect = false; | |
if (c == '(' || c == '[' || c == '{' || c == '<') | |
{ | |
InstructionStack.Push(c); | |
} | |
else | |
{ | |
if (InstructionStack.Peek() == Delimiters[c]) | |
{ | |
InstructionStack.Pop(); | |
} | |
else | |
{ | |
isIncorrect = true; | |
switch (c) | |
{ | |
case ')': | |
ErrorScoresPart1.Add(3); | |
break; | |
case ']': | |
ErrorScoresPart1.Add(57); | |
break; | |
case '}': | |
ErrorScoresPart1.Add(1197); | |
break; | |
case '>': | |
ErrorScoresPart1.Add(25137); | |
break; | |
} | |
break; | |
} | |
} | |
} | |
if (!isIncorrect) | |
{ | |
IncompleteLines.Add(Instruction); | |
} | |
} | |
foreach (char[] IncompleteInstruction in IncompleteLines) | |
{ | |
Stack<char> InstructionStack = new Stack<char>(); | |
long ErrorScore = 0; | |
foreach (char c in IncompleteInstruction) | |
{ | |
if (c == '(' || c == '[' || c == '{' || c == '<') | |
{ | |
InstructionStack.Push(c); | |
} | |
else | |
{ | |
if (InstructionStack.Peek() == Delimiters[c]) | |
{ | |
InstructionStack.Pop(); | |
} | |
} | |
} | |
while (InstructionStack.Count > 0) | |
{ | |
char c1 = InstructionStack.Pop(); | |
switch (c1) | |
{ | |
case '(': | |
ErrorScore = (ErrorScore * 5) + 1; | |
break; | |
case '[': | |
ErrorScore = (ErrorScore * 5) + 2; | |
break; | |
case '{': | |
ErrorScore = (ErrorScore * 5) + 3; | |
break; | |
case '<': | |
ErrorScore = (ErrorScore * 5) + 4; | |
break; | |
} | |
} | |
ErrorScoresPart2.Add(ErrorScore); | |
} | |
Console.WriteLine(ErrorScoresPart1.Sum()); | |
Console.WriteLine(ErrorScoresPart2 | |
.OrderBy(x => x) | |
.ToList() | |
.ElementAt((int)ErrorScoresPart2.Count / 2)); | |
} | |
} | |
} |
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