#advent of code 2020
#day 15
#it took less than 1min to bruteforce part 2 so I guess it's a free star

limit1 = 2020;
limit2 = 30000000;
turn = 0;
SpokenNumbers = dict();
StartingNumbers =[int(N) for N in open("15.in","r").read().split(",")];
for i,n in enumerate(StartingNumbers[:-1]):
	turn += 1;
	SpokenNumbers[n] = i+1;
	#LastNumber = n;
	print(turn,n);

p1 = None;
p2 = None;
turn += 1;
LastNumber = StartingNumbers[-1];

while turn < limit2:
	turn += 1;
	if LastNumber in SpokenNumbers:
		speak = turn -1 - SpokenNumbers[LastNumber]; 
	else:
		speak = 0;
	SpokenNumbers[LastNumber] = turn -1;
	LastNumber = speak;
	print(turn, speak); #since it's a bruteforce I'm leaving it as a progress bar
	if turn == limit1:
		p1 = LastNumber;

p2 = LastNumber;
print("part 1 = ", p1);
print("part 2 = ", p2);