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chore: add stopwatch

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Stevan Freeborn
2023-12-06 23:23:47 -06:00
parent a19c560215
commit 4621e17a8e
1 changed files with 27 additions and 10 deletions
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06/WaitForIt/Program.cs
+27 -10
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@@ -1,4 +1,6 @@
namespace WaitForIt; using System.Diagnostics;
namespace WaitForIt;
public class Program public class Program
{ {
@@ -20,6 +22,9 @@ public class Program
var input = await File.ReadAllLinesAsync(args[0]); var input = await File.ReadAllLinesAsync(args[0]);
var isPart2 = args.Length > 1 && args[1] == "part2"; var isPart2 = args.Length > 1 && args[1] == "part2";
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = isPart2 long result = isPart2
? parser ? parser
.ParseRace(input) .ParseRace(input)
@@ -28,13 +33,15 @@ public class Program
.Select(r => r.CalculateNumberOfWaysToWin()) .Select(r => r.CalculateNumberOfWaysToWin())
.Aggregate((long)1, (acc, curr) => acc * curr); .Aggregate((long)1, (acc, curr) => acc * curr);
stopWatch.Stop();
if (isPart2) if (isPart2)
{ {
Console.WriteLine($"The number of ways to win is {result}."); Console.WriteLine($"The number of ways to win is {result}. ({stopWatch.ElapsedMilliseconds}ms)");
} }
else else
{ {
Console.WriteLine($"The total number of ways to win is {result}."); Console.WriteLine($"The total number of ways to win is {result}. ({stopWatch.ElapsedMilliseconds}ms)");
} }
return (int)result; return (int)result;
@@ -117,19 +124,29 @@ public class Race(
/// <returns>The number of ways the race can be won.</returns> /// <returns>The number of ways the race can be won.</returns>
public long CalculateNumberOfWaysToWin() public long CalculateNumberOfWaysToWin()
{ {
var numberOfWaysToWin = 0; var minDuration = 0.0;
var maxDuration = Math.Floor(Duration / 2.0);
for (var secsHeld = 0; secsHeld < Duration; secsHeld++) while (minDuration < maxDuration - 1)
{ {
var speed = 1 * secsHeld; var middleDuration = Math.Floor((maxDuration + minDuration) / 2);
var distance = speed * (Duration - secsHeld); var speed = 1 * middleDuration;
var distance = speed * (Duration - middleDuration);
if (distance > DistanceRecord) if (distance >= DistanceRecord)
{ {
numberOfWaysToWin++; maxDuration = middleDuration;
}
else
{
minDuration = middleDuration;
} }
} }
return numberOfWaysToWin; var result = Duration % 2 == 0
? Duration - ((long)maxDuration * 2) - 1
: Duration - ((long)maxDuration * 2) + 1;
return result;
} }
} }