day 4 finished... turns out my answer was wrong cuz i was using the test input file and not the real one. rip

day4/c/aoc_day4.c

@@ -10,7 +10,7 @@
 #define RED     "\033[31m"
 
 #define DEBUG
-#define INPUT_FILE			("../input_test.txt")
+#define INPUT_FILE			("../input.txt")
 #define MAX_NUMBERS_DRAWN	(1024)
 #define MAX_BOARDS			(256)
 /*
@@ -27,16 +27,10 @@
 	x x x x x	x x x x x	* * * * *	x x x x x	x x x x x
 	x x x x x	x x x x x	x x x x x	* * * * *	x x x x x
 	x x x x x	x x x x x	x x x x x	x x x x x	* * * * *
-
-	* x x x x	x x x x *
-	x * x x x	x x x * x
-	x x * x x	x x * x x
-	x x x * x	x * x x x
-	x x x x *	* x x x x
  */
 
 
-const uint32_t win_conditions[12] =
+const uint32_t win_conditions[10] =
 	{
 		0b00000000000100001000010000100001,
 		0b00000000001000010000100001000010,
@@ -47,9 +41,7 @@ const uint32_t win_conditions[12] =
 		0b00000000000000000000001111100000,
 		0b00000000000000000111110000000000,
 		0b00000000000011111000000000000000,
-		0b00000001111100000000000000000000,
-		0b00000001000001000001000001000001,
-		0b00000000000100010001000100010000,
+		0b00000001111100000000000000000000
 	};
 
 
@@ -63,6 +55,8 @@ typedef struct board_t
 	// bit position 19 will be a 1
 	uint32_t output;
 	uint8_t most_recently_drawn;
+	// if true, its got a bingo
+	bool bingo_status;
 }board_t;
 
 bool bingo_board_win_check(const board_t* board);
@@ -73,6 +67,7 @@ void print_bingo_board(const board_t* board);
 int main(void)
 {
 	int p1_answer = 0;
+	int p2_answer = 0;
 	board_t bingo_bank[MAX_BOARDS];
 	uint16_t bingo_board_count = 0;
 
@@ -123,7 +118,6 @@ int main(void)
 				printf("some error while parsing");
 				exit(-1);
 			}
-			printf("Reading in this line: %s", line);
 			sscanf(line,
 				   "%2" SCNu8 " "
 				   "%2" SCNu8 " "
@@ -136,20 +130,21 @@ int main(void)
 					   &bingo_bank[bingo_board_count].matrix[ind][3],
 					   &bingo_bank[bingo_board_count].matrix[ind][4]);
 		}
-		printf("done reading lines\n\n");
 		bingo_board_count++;
 	}
 
-	#ifdef DEBUG
+#ifdef DEBUG
 	for(int ind = 0; ind < bingo_board_count; ind++)
 	{
 		print_bingo_board(&bingo_bank[ind]);
 	}
-	#endif
+#endif
 
 	for(int ind = 0; ind < bingo_drawn_numbers_ct; ind++)
 	{
+#ifdef DEBUG
 		printf("... drawing number ... Number #%d!\n", bingo_drawn_numbers[ind]);
+#endif
 		for(int board = 0; board < bingo_board_count; board++)
 		{
 			if(bingo_add_new_entry(&bingo_bank[board], bingo_drawn_numbers[ind]))
@@ -160,9 +155,9 @@ int main(void)
 				#endif
 				break;
 			}
-			#ifdef DEBUG
+#ifdef DEBUG
 			print_bingo_board(&bingo_bank[board]);
-			#endif
+#endif
 		}
 		if(p1_answer != 0)
 		{
@@ -171,6 +166,49 @@ int main(void)
 	}
 
 	printf("Answer for part 1: %d\n", p1_answer);
+	printf("Part 2... Begin!\n");
+
+	// to do part 2, we're going to completely restart
+	// we could just keep going off of the above for loop to save time
+	// but i want the solutions to be as separate as possible
+
+	// so lets reset the count
+	for(int board = 0; board < bingo_board_count; board++)
+	{
+		bingo_bank[board].output = 0;
+	}
+
+	// now we restart the process
+	int completed_boards = 0;
+	for(int ind = 0; ind < bingo_drawn_numbers_ct; ind++)
+	{
+#ifdef DEBUG
+		printf("... drawing number ... #%d!\n", bingo_drawn_numbers[ind]);
+#endif
+		for(int board = 0; board < bingo_board_count; board++)
+		{
+			if(bingo_bank[board].bingo_status)
+			{
+				continue;
+			}
+			if(bingo_add_new_entry(&bingo_bank[board], bingo_drawn_numbers[ind]))
+			{
+				p2_answer = bingo_board_compute_answer(&bingo_bank[board]);
+				bingo_bank[board].bingo_status = true;
+				++completed_boards;
+			}
+#ifdef DEBUG
+			print_bingo_board(&bingo_bank[board]);
+			printf("Number of completed boards: %d\n", completed_boards);
+#endif
+		}
+		if(completed_boards >= bingo_board_count)
+		{
+			break;
+		}
+	}
+
+	printf("Answer for part 2: %d\n", p2_answer);
 	return 0;
 }
 
@@ -195,7 +233,7 @@ bool bingo_add_new_entry(board_t* board, uint8_t num)
 
 bool bingo_board_win_check(const board_t* board)
 {
-	for(int wc = 0; wc < 12; wc++)
+	for(int wc = 0; wc < 10; wc++)
 	{
 		// found a winner check
 		if((board->output & win_conditions[wc]) == win_conditions[wc])

day4/input.txt

@@ -0,0 +1,601 @@
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+
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+
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+
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+
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day4/input_test.txt

@@ -0,0 +1,19 @@
+7,4,9,5,11,17,23,2,0,14,21,24,10,16,13,6,15,25,12,22,18,20,8,19,3,26,1
+
+22 13 17 11  0
+ 8  2 23  4 24
+21  9 14 16  7
+ 6 10  3 18  5
+ 1 12 20 15 19
+
+ 3 15  0  2 22
+ 9 18 13 17  5
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+14 21 16 12  6
+
+14 21 17 24  4
+10 16 15  9 19
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+22 11 13  6  5
+ 2  0 12  3 7