private Result OperationAcc(List <InstructionOperation> instructionsMap)
{
Result result = new Result();
int index = 0;
InstructionOperation currOperation = instructionsMap[index];
List <int> visitedOperation = new List <int>();
while (!visitedOperation.Contains(index))
{
visitedOperation.Add(index);
switch (currOperation.operation)
{
case "nop":
++index;
break;
case "jmp":
index += currOperation.argument;
break;
case "acc":
result.accumulator += currOperation.argument;
++index;
break;
default:
break;
}
if (index >= instructionsMap.Count)
{
break;
}
currOperation = instructionsMap[index];
}
if (visitedOperation.Contains(index))
{
result.isLooping = true;
}
return(result);
}
private Result Part2(List <InstructionOperation> instructionsMap)
{
Result result;
int index = 0;
string oldIns = string.Empty;
do
{
bool found = false;
while (!found && index < instructionsMap.Count)
{
InstructionOperation currIns = instructionsMap[index];
if (currIns.operation == "jmp")
{
found = true;
oldIns = currIns.operation;
currIns.operation = "nop";
}
else if (currIns.operation == "nop")
{
found = true;
oldIns = currIns.operation;
currIns.operation = "jmp";
}
++index;
}
result = OperationAcc(instructionsMap);
if (result.isLooping)
{
instructionsMap[index - 1].operation = oldIns;
}
else
{
break;
}
} while (index < instructionsMap.Count);
return(result);
}