public void Day12Part1_TestSolution()
{
// string[] bodies = DayDataUtilities.ReadLinesFromFile("day12.txt");
// Assert.NotNull(bodies);
//< x = 15, y = -2, z = -6 >
//< x = -5, y = -4, z = -11 >
//< x = 0, y = -6, z = 0 >
//< x = 5, y = 9, z = 6 >
int[,] bodies = new int[4, 3]
{
{ 15, -2, -6 },
{ -5, -4, -11 },
{ 0, -6, 0 },
{ 5, 9, 6 }
};
var sut = new NBodyCalculator(bodies);
Assert.NotNull(sut.Bodies);
Assert.Equal(15, sut.Bodies[0, 0]);
Assert.Equal(-4, sut.Bodies[1, 1]);
Assert.Equal(0, sut.Bodies[2, 2]);
Assert.Equal(9, sut.Bodies[3, 1]);
sut.DumpBodiesAndVelocities();
for (int step = 1; step <= 1000; step++)
{
sut.CalculateVelocity();
sut.ApplyVelocity();
}
sut.DumpBodiesAndVelocities();
Assert.Equal(6735, sut.CalculateTotalEnergy());
}
public void Day12Part1_Example01()
{
//< x = -1, y = 0, z = 2 >
//< x = 2, y = -10, z = -7 >
//< x = 4, y = -8, z = 8 >
//< x = 3, y = 5, z = -1 >
int[,] bodies = new int[4, 3]
{
{ -1, 0, 2 },
{ 2, -10, -7 },
{ 4, -8, 8 },
{ 3, 5, -1 }
};
var sut = new NBodyCalculator(bodies);
Assert.NotNull(sut.Bodies);
Assert.Equal(-1, sut.Bodies[0, 0]);
Assert.Equal(-10, sut.Bodies[1, 1]);
Assert.Equal(8, sut.Bodies[2, 2]);
Assert.Equal(5, sut.Bodies[3, 1]);
sut.DumpBodiesAndVelocities();
// step 1
sut.CalculateVelocity();
sut.ApplyVelocity();
sut.DumpBodiesAndVelocities();
Assert.Equal(2, sut.Bodies[0, 0]);
Assert.Equal(-7, sut.Bodies[1, 1]);
Assert.Equal(5, sut.Bodies[2, 2]);
Assert.Equal(2, sut.Bodies[3, 1]);
for (int step = 2; step <= 10; step++)
{
Debug.WriteLine("Step: ", step);
sut.CalculateVelocity();
sut.ApplyVelocity();
sut.DumpBodiesAndVelocities();
}
Assert.Equal(2, sut.Bodies[0, 0]);
Assert.Equal(-8, sut.Bodies[1, 1]);
Assert.Equal(1, sut.Bodies[2, 2]);
Assert.Equal(0, sut.Bodies[3, 1]);
Assert.Equal(179, sut.CalculateTotalEnergy());
}
public void Day12Part2_TestSolution()
{
// string[] bodies = DayDataUtilities.ReadLinesFromFile("day12.txt");
// Assert.NotNull(bodies);
//< x = 15, y = -2, z = -6 >
//< x = -5, y = -4, z = -11 >
//< x = 0, y = -6, z = 0 >
//< x = 5, y = 9, z = 6 >
int[,] bodies = new int[4, 3]
{
{ 15, -2, -6 },
{ -5, -4, -11 },
{ 0, -6, 0 },
{ 5, 9, 6 }
};
var sut = new NBodyCalculator(bodies);
Assert.NotNull(sut.Bodies);
Assert.Equal(15, sut.Bodies[0, 0]);
Assert.Equal(-4, sut.Bodies[1, 1]);
Assert.Equal(0, sut.Bodies[2, 2]);
Assert.Equal(9, sut.Bodies[3, 1]);
sut.DumpBodiesAndVelocities();
string hash = sut.HashBodiesAndVelocities();
Dictionary <string, long> hashDict = new Dictionary <string, long>();
hashDict.Add(hash, 0);
long step = 1;
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
hash = sut.HashBodiesAndVelocities();
if (hashDict.ContainsKey(hash))
{
sut.DumpBodiesAndVelocities();
break;
}
hashDict.Add(hash, step);
step++;
} while (step > 1);
Assert.Equal(1, step);
}
public void Day12Part2_Example01()
{
//< x = -1, y = 0, z = 2 >
//< x = 2, y = -10, z = -7 >
//< x = 4, y = -8, z = 8 >
//< x = 3, y = 5, z = -1 >
int[,] bodies = new int[4, 3]
{
{ -1, 0, 2 },
{ 2, -10, -7 },
{ 4, -8, 8 },
{ 3, 5, -1 }
};
var sut = new NBodyCalculator(bodies);
Assert.NotNull(sut.Bodies);
Assert.Equal(-1, sut.Bodies[0, 0]);
Assert.Equal(-10, sut.Bodies[1, 1]);
Assert.Equal(8, sut.Bodies[2, 2]);
Assert.Equal(5, sut.Bodies[3, 1]);
sut.DumpBodiesAndVelocities();
string hash = sut.HashBodiesAndVelocities();
Dictionary <string, long> hashDict = new Dictionary <string, long>();
hashDict.Add(hash, 0);
long step = 1;
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
hash = sut.HashBodiesAndVelocities();
if (hashDict.ContainsKey(hash))
{
sut.DumpBodiesAndVelocities();
break;
}
hashDict.Add(hash, step);
step++;
} while (step > 1);
Assert.Equal(2772, step);
}
public void Day12Part1_Example02()
{
//< x = -8, y = -10, z = 0 >
//< x = 5, y = 5, z = 10 >
//< x = 2, y = -7, z = 3 >
//< x = 9, y = -8, z = -3 >
int[,] bodies = new int[4, 3]
{
{ -8, -10, 0 },
{ 5, 5, 10 },
{ 2, -7, 3 },
{ 9, -8, -3 }
};
var sut = new NBodyCalculator(bodies);
Assert.NotNull(sut.Bodies);
Assert.Equal(-8, sut.Bodies[0, 0]);
Assert.Equal(5, sut.Bodies[1, 1]);
Assert.Equal(3, sut.Bodies[2, 2]);
Assert.Equal(-8, sut.Bodies[3, 1]);
sut.DumpBodiesAndVelocities();
for (int step = 1; step <= 100; step++)
{
Debug.WriteLine("Step: ", step);
sut.CalculateVelocity();
sut.ApplyVelocity();
}
sut.DumpBodiesAndVelocities();
Assert.Equal(8, sut.Bodies[0, 0]);
Assert.Equal(16, sut.Bodies[1, 1]);
Assert.Equal(-1, sut.Bodies[2, 2]);
Assert.Equal(-13, sut.Bodies[3, 1]);
Assert.Equal(1940, sut.CalculateTotalEnergy());
}
public void Day12Part2_TestSolutionIn3Parts()
{
//< x = 15, y = -2, z = -6 >
//< x = -5, y = -4, z = -11 >
//< x = 0, y = -6, z = 0 >
//< x = 5, y = 9, z = 6 >
int[,] bodies = new int[4, 3]
{
{ 15, -2, -6 },
{ -5, -4, -11 },
{ 0, -6, 0 },
{ 5, 9, 6 }
};
int[,] orgBodies = new int[4, 3]
{
{ 15, -2, -6 },
{ -5, -4, -11 },
{ 0, -6, 0 },
{ 5, 9, 6 }
};
var sut = new NBodyCalculator(bodies);
Assert.NotNull(sut.Bodies);
Assert.Equal(15, sut.Bodies[0, 0]);
Assert.Equal(-4, sut.Bodies[1, 1]);
Assert.Equal(0, sut.Bodies[2, 2]);
Assert.Equal(9, sut.Bodies[3, 1]);
sut.DumpBodiesAndVelocities();
Assert.True(sut.Equal(orgBodies, 0));
Assert.True(sut.Equal(orgBodies, 1));
Assert.True(sut.Equal(orgBodies, 2));
long step = 1;
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 0));
Assert.Equal(161429, step);
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 0));
Assert.Equal(161429 + 161428, step);
sut = new NBodyCalculator(orgBodies);
step = 1;
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 1));
Assert.Equal(167625, step);
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 1));
Assert.Equal(167625 + 167624, step);
sut = new NBodyCalculator(orgBodies);
step = 1;
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 2));
Assert.Equal(193053, step);
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 2));
Assert.Equal(193053 + 193052, step);
// x: 161428 = 2*2*40357
// y: 167624 = 2*2*2*23*911
// z: 193052 = 2*2*17*17*167
long result = 2L * 2 * 2 * 17 * 17 * 23 * 167 * 911 * 40357;
Assert.Equal(326489627728984, result);
}
public void Day12Part2_Example01in3s()
{
//< x = -1, y = 0, z = 2 >
//< x = 2, y = -10, z = -7 >
//< x = 4, y = -8, z = 8 >
//< x = 3, y = 5, z = -1 >
int[,] orgBodies = new int[4, 3]
{
{ -1, 0, 2 },
{ 2, -10, -7 },
{ 4, -8, 8 },
{ 3, 5, -1 }
};
int[,] bodies = new int[4, 3]
{
{ -1, 0, 2 },
{ 2, -10, -7 },
{ 4, -8, 8 },
{ 3, 5, -1 }
};
var sut = new NBodyCalculator(bodies);
Assert.NotNull(sut.Bodies);
Assert.Equal(-1, sut.Bodies[0, 0]);
Assert.Equal(-10, sut.Bodies[1, 1]);
Assert.Equal(8, sut.Bodies[2, 2]);
Assert.Equal(5, sut.Bodies[3, 1]);
sut.DumpBodiesAndVelocities();
Assert.True(sut.Equal(orgBodies, 0));
Assert.True(sut.Equal(orgBodies, 1));
Assert.True(sut.Equal(orgBodies, 2));
long step = 1;
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 0));
Assert.Equal(19, step);
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 0));
Assert.Equal(37, step);
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 0));
Assert.Equal(55, step);
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 0));
Assert.Equal(73, step);
sut = new NBodyCalculator(orgBodies);
step = 1;
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 1));
Assert.Equal(29, step);
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 1));
Assert.Equal(29 + 28, step);
sut = new NBodyCalculator(orgBodies);
step = 1;
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 2));
Assert.Equal(45, step);
do
{
sut.CalculateVelocity();
sut.ApplyVelocity();
step++;
} while (!sut.Equal(orgBodies, 2));
Assert.Equal(45 + 44, step);
}