muahahaha

3 files changed, 600 insertions, 0 deletions

diff --git a/2021/05/Makefile b/2021/05/Makefile
new file mode 100644
index 0000000..4a881b7
--- /dev/null
+++ b/2021/05/Makefile
@@ -0,0 +1,19 @@
+DEBUG = -Wno-error -Og -g -s -fsanitize=undefined -fsanitize=address -fstack-protector-all
+CFLAGS = -Wall -Wextra -Werror -Wshadow -Wpointer-arith -Wwrite-strings -Wredundant-decls -Wnested-externs -Wformat=2 -Wmissing-declarations -Wstrict-prototypes -Wmissing-prototypes -Wcast-qual -Wswitch-default -Wswitch-enum -Wunreachable-code -Wundef -Wold-style-definition -Wvla -pedantic-errors -Ofast
+
+# Not the best makefile but idc
+
+debug:
+	@gcc $(CFLAGS) $(DEBUG) solve.c -o solve.o -L/usr/lib -lcrypto
+
+build:
+	@gcc $(CFLAGS) solve.c -o solve.o -L/usr/lib -lcrypto
+
+clean:
+	@rm -f *.o
+
+run: debug
+	@./solve.o
+
+time: build
+	@./solve.o
diff --git a/2021/05/input b/2021/05/input
new file mode 100644
index 0000000..69f6044
--- /dev/null
+++ b/2021/05/input
@@ -0,0 +1,500 @@
+365,809 -> 365,271
+899,814 -> 899,921
+967,913 -> 434,913
+971,362 -> 631,362
+597,422 -> 597,575
+722,82 -> 722,365
+98,891 -> 972,17
+361,534 -> 361,52
+958,858 -> 958,612
+261,683 -> 261,477
+859,381 -> 850,372
+773,305 -> 703,305
+527,318 -> 281,72
+29,119 -> 863,953
+428,723 -> 428,971
+582,787 -> 582,326
+795,495 -> 795,525
+920,548 -> 920,718
+421,264 -> 714,557
+635,310 -> 635,983
+751,479 -> 534,696
+121,768 -> 121,129
+679,858 -> 737,858
+499,549 -> 603,653
+398,95 -> 398,537
+459,626 -> 473,626
+611,905 -> 854,662
+139,124 -> 568,124
+230,921 -> 960,191
+550,258 -> 883,258
+866,830 -> 681,645
+501,840 -> 774,840
+383,900 -> 383,536
+635,690 -> 868,690
+37,948 -> 954,31
+785,598 -> 785,955
+844,957 -> 130,243
+395,307 -> 562,307
+463,286 -> 374,286
+798,351 -> 52,351
+549,79 -> 549,300
+153,847 -> 977,23
+499,976 -> 499,576
+687,281 -> 621,215
+765,640 -> 794,640
+776,287 -> 906,157
+879,108 -> 333,108
+340,565 -> 340,521
+706,809 -> 159,262
+725,896 -> 941,896
+673,470 -> 792,470
+446,562 -> 638,754
+315,626 -> 189,500
+816,637 -> 77,637
+171,313 -> 171,82
+941,19 -> 150,810
+885,854 -> 513,854
+864,177 -> 864,213
+156,150 -> 544,538
+810,20 -> 344,486
+651,757 -> 623,729
+567,475 -> 126,475
+436,975 -> 707,975
+948,977 -> 138,167
+498,186 -> 601,289
+532,900 -> 532,515
+12,809 -> 60,761
+561,344 -> 453,452
+241,600 -> 780,61
+600,574 -> 258,232
+53,661 -> 224,490
+735,134 -> 735,707
+850,14 -> 398,14
+472,489 -> 472,22
+949,196 -> 492,196
+220,30 -> 959,769
+354,889 -> 632,889
+779,537 -> 397,919
+136,876 -> 896,116
+12,983 -> 930,65
+716,856 -> 716,516
+595,604 -> 595,97
+863,70 -> 946,70
+13,988 -> 988,13
+595,955 -> 978,955
+138,300 -> 138,452
+801,883 -> 830,854
+189,13 -> 110,13
+315,68 -> 147,68
+594,977 -> 594,707
+424,726 -> 836,314
+596,790 -> 842,790
+135,135 -> 823,823
+257,639 -> 718,178
+462,859 -> 965,859
+935,29 -> 18,946
+308,841 -> 676,473
+372,607 -> 946,607
+518,806 -> 201,489
+620,689 -> 620,480
+376,378 -> 376,900
+86,675 -> 179,768
+509,790 -> 509,501
+778,143 -> 778,474
+965,140 -> 194,911
+621,458 -> 316,153
+83,931 -> 959,55
+533,647 -> 402,778
+957,336 -> 397,336
+929,788 -> 929,587
+642,978 -> 647,978
+429,275 -> 276,275
+662,821 -> 120,279
+137,208 -> 85,260
+815,641 -> 763,589
+222,510 -> 881,510
+892,930 -> 845,930
+288,268 -> 288,509
+900,13 -> 79,13
+438,764 -> 248,764
+391,495 -> 391,771
+868,713 -> 223,68
+680,180 -> 680,553
+911,389 -> 911,578
+107,182 -> 107,555
+944,787 -> 944,25
+405,193 -> 569,193
+341,182 -> 952,182
+497,197 -> 820,197
+204,224 -> 693,224
+342,290 -> 342,479
+881,281 -> 881,899
+971,987 -> 11,27
+389,729 -> 501,729
+638,939 -> 316,617
+923,799 -> 923,84
+17,744 -> 17,47
+305,163 -> 305,506
+703,414 -> 74,414
+572,537 -> 122,987
+385,364 -> 385,403
+667,825 -> 667,607
+466,86 -> 842,86
+591,209 -> 151,649
+329,526 -> 329,772
+756,769 -> 122,135
+638,454 -> 380,454
+316,98 -> 654,98
+273,740 -> 627,386
+88,982 -> 963,107
+913,710 -> 913,157
+530,410 -> 129,410
+660,237 -> 256,641
+865,149 -> 865,934
+769,47 -> 76,740
+520,876 -> 520,630
+101,839 -> 394,546
+422,874 -> 330,874
+987,19 -> 20,986
+398,771 -> 174,771
+574,546 -> 582,546
+896,52 -> 11,937
+927,927 -> 927,923
+111,822 -> 953,822
+633,130 -> 76,130
+193,74 -> 193,400
+887,828 -> 887,160
+284,313 -> 500,97
+813,500 -> 839,500
+312,534 -> 129,534
+202,34 -> 202,196
+740,597 -> 681,597
+37,979 -> 892,124
+494,235 -> 494,426
+334,892 -> 334,788
+679,728 -> 947,728
+635,557 -> 242,950
+301,713 -> 326,738
+261,867 -> 986,867
+959,344 -> 412,891
+605,659 -> 647,701
+806,931 -> 270,395
+546,107 -> 150,107
+836,793 -> 131,88
+231,572 -> 99,572
+257,580 -> 257,459
+254,669 -> 254,52
+105,26 -> 973,894
+101,532 -> 339,770
+854,695 -> 319,160
+599,190 -> 227,562
+783,816 -> 370,816
+505,638 -> 889,638
+742,615 -> 742,399
+984,750 -> 984,662
+295,736 -> 937,94
+762,435 -> 239,958
+876,89 -> 758,89
+178,964 -> 651,964
+385,389 -> 67,71
+514,967 -> 462,915
+819,758 -> 819,978
+541,109 -> 767,109
+137,262 -> 137,815
+720,591 -> 934,805
+56,79 -> 752,775
+493,519 -> 493,278
+202,718 -> 202,344
+665,24 -> 446,24
+426,845 -> 426,193
+116,930 -> 982,64
+625,587 -> 625,908
+13,965 -> 919,59
+124,466 -> 124,194
+793,249 -> 480,562
+20,174 -> 359,174
+982,988 -> 25,31
+71,416 -> 586,416
+157,122 -> 363,122
+31,453 -> 344,453
+435,284 -> 387,284
+389,446 -> 379,446
+913,536 -> 32,536
+505,952 -> 505,495
+489,159 -> 222,426
+267,118 -> 954,805
+15,833 -> 15,323
+77,197 -> 946,197
+955,22 -> 955,798
+620,707 -> 620,915
+740,495 -> 740,334
+770,735 -> 770,184
+420,524 -> 420,108
+382,982 -> 556,982
+111,777 -> 867,21
+280,105 -> 915,740
+235,23 -> 863,651
+679,402 -> 197,884
+72,77 -> 829,834
+858,486 -> 443,486
+403,115 -> 403,342
+489,547 -> 489,53
+404,280 -> 950,826
+680,458 -> 260,458
+10,610 -> 315,915
+386,630 -> 128,888
+293,732 -> 293,861
+204,378 -> 116,378
+90,269 -> 90,173
+893,869 -> 92,68
+741,694 -> 741,136
+620,449 -> 620,62
+866,678 -> 441,253
+885,212 -> 167,930
+868,853 -> 868,852
+392,926 -> 982,336
+252,930 -> 829,930
+758,606 -> 949,606
+79,895 -> 798,176
+394,688 -> 901,688
+355,217 -> 355,732
+43,23 -> 903,883
+426,691 -> 695,422
+970,416 -> 970,950
+317,334 -> 957,974
+198,160 -> 198,195
+610,191 -> 852,191
+388,569 -> 899,58
+490,662 -> 517,689
+691,627 -> 643,627
+404,564 -> 539,564
+946,623 -> 478,155
+686,608 -> 686,213
+573,508 -> 47,508
+610,262 -> 610,905
+782,602 -> 581,602
+987,378 -> 987,391
+443,243 -> 447,243
+710,493 -> 54,493
+564,179 -> 564,966
+828,673 -> 828,691
+761,869 -> 260,869
+810,949 -> 192,331
+674,263 -> 467,263
+481,81 -> 940,540
+779,301 -> 159,301
+763,457 -> 574,646
+794,770 -> 784,780
+19,964 -> 973,10
+809,720 -> 809,142
+822,324 -> 822,112
+120,980 -> 354,980
+238,277 -> 636,675
+747,647 -> 550,450
+419,205 -> 419,494
+34,968 -> 719,283
+306,591 -> 401,496
+648,673 -> 526,795
+486,426 -> 44,426
+441,642 -> 137,338
+396,740 -> 585,740
+741,227 -> 117,851
+620,263 -> 319,263
+421,321 -> 300,321
+732,387 -> 732,784
+445,59 -> 445,273
+151,910 -> 220,841
+836,599 -> 274,599
+598,193 -> 95,193
+718,765 -> 884,931
+403,165 -> 591,165
+241,441 -> 736,441
+902,986 -> 190,274
+190,671 -> 190,342
+887,301 -> 887,216
+878,747 -> 244,113
+93,747 -> 814,26
+764,604 -> 764,444
+510,852 -> 175,852
+50,718 -> 132,718
+791,436 -> 95,436
+751,122 -> 751,146
+953,162 -> 953,168
+113,546 -> 113,828
+752,407 -> 482,407
+398,412 -> 305,412
+912,630 -> 830,630
+699,155 -> 354,155
+842,874 -> 451,483
+18,83 -> 580,645
+63,594 -> 945,594
+557,286 -> 557,773
+21,448 -> 21,11
+955,724 -> 955,353
+857,411 -> 857,41
+605,932 -> 605,159
+985,64 -> 216,833
+34,673 -> 610,97
+888,764 -> 888,415
+574,801 -> 646,801
+290,593 -> 290,694
+151,72 -> 887,808
+632,53 -> 632,98
+346,686 -> 963,69
+258,129 -> 582,453
+189,205 -> 646,662
+272,821 -> 946,147
+409,531 -> 462,478
+725,575 -> 894,575
+885,888 -> 885,878
+475,210 -> 763,210
+42,963 -> 920,85
+985,213 -> 271,213
+538,842 -> 482,842
+175,529 -> 662,529
+853,670 -> 259,76
+656,364 -> 373,647
+114,134 -> 827,134
+58,878 -> 58,569
+45,340 -> 684,979
+35,829 -> 611,829
+625,166 -> 625,898
+849,980 -> 143,980
+720,92 -> 330,92
+689,255 -> 689,389
+842,526 -> 867,526
+834,399 -> 395,838
+325,212 -> 786,673
+934,941 -> 31,38
+211,640 -> 812,39
+449,896 -> 82,896
+795,757 -> 630,592
+894,691 -> 894,11
+639,839 -> 639,360
+941,862 -> 676,862
+480,757 -> 480,123
+425,734 -> 425,332
+391,704 -> 350,745
+173,352 -> 131,352
+814,703 -> 814,150
+347,156 -> 609,156
+427,520 -> 862,520
+787,724 -> 206,724
+313,587 -> 312,587
+743,491 -> 743,580
+277,964 -> 845,396
+132,65 -> 864,797
+227,619 -> 227,365
+360,484 -> 299,484
+717,790 -> 875,790
+798,480 -> 413,95
+643,518 -> 643,407
+939,530 -> 440,31
+241,44 -> 241,82
+362,49 -> 316,49
+160,98 -> 382,98
+67,593 -> 508,593
+363,456 -> 470,456
+644,63 -> 273,63
+341,696 -> 72,696
+270,303 -> 270,60
+716,391 -> 716,983
+678,904 -> 756,826
+480,487 -> 290,487
+762,316 -> 762,969
+380,735 -> 380,652
+223,922 -> 436,709
+690,733 -> 815,733
+185,130 -> 555,130
+10,931 -> 924,17
+678,940 -> 891,940
+702,112 -> 702,673
+554,559 -> 812,301
+406,758 -> 377,758
+361,119 -> 96,384
+787,356 -> 787,963
+957,54 -> 23,988
+636,650 -> 34,48
+170,21 -> 170,541
+955,103 -> 85,973
+144,698 -> 381,698
+85,55 -> 925,895
+12,15 -> 978,981
+32,954 -> 32,301
+438,234 -> 195,477
+121,438 -> 121,542
+353,607 -> 919,607
+978,646 -> 978,643
+925,112 -> 925,646
+447,120 -> 447,104
+332,398 -> 568,162
+399,841 -> 276,841
+923,853 -> 923,820
+890,202 -> 964,202
+306,782 -> 871,217
+547,558 -> 21,32
+893,164 -> 508,549
+485,76 -> 361,76
+713,768 -> 570,768
+314,18 -> 461,18
+618,281 -> 715,281
+374,787 -> 374,209
+324,97 -> 405,97
+890,729 -> 566,729
+762,438 -> 762,978
+274,49 -> 274,525
+905,34 -> 905,741
+799,384 -> 799,742
+378,358 -> 378,17
+805,131 -> 31,905
+640,453 -> 640,800
+563,305 -> 563,945
+898,590 -> 57,590
+513,187 -> 513,76
+706,407 -> 500,407
+235,69 -> 861,695
+408,259 -> 624,43
+327,308 -> 722,308
+109,247 -> 183,247
+487,493 -> 619,625
+769,452 -> 899,452
+727,765 -> 524,968
+887,472 -> 801,472
+157,100 -> 936,879
+584,658 -> 584,582
+557,488 -> 557,510
+790,35 -> 28,797
+458,920 -> 350,812
+54,797 -> 790,61
+59,387 -> 59,334
+565,368 -> 268,368
+70,146 -> 70,525
+681,451 -> 242,890
+869,831 -> 869,272
+276,184 -> 276,517
+984,922 -> 984,426
+616,572 -> 307,881
+323,806 -> 700,806
+595,547 -> 595,651
+731,638 -> 731,582
+760,836 -> 31,107
+768,377 -> 347,798
+847,765 -> 431,765
+777,95 -> 777,837
+832,330 -> 460,330
+423,213 -> 423,110
+937,549 -> 937,882
+529,735 -> 570,735
+436,343 -> 771,343
+965,833 -> 965,143
+518,484 -> 65,31
+940,989 -> 940,293
+983,63 -> 63,983
+237,733 -> 237,735
+624,281 -> 624,330
+473,719 -> 633,719
+312,489 -> 872,489
+369,520 -> 539,520
+80,705 -> 133,652
+659,289 -> 163,785
diff --git a/2021/05/solve.c b/2021/05/solve.c
new file mode 100644
index 0000000..b0f6777
--- /dev/null
+++ b/2021/05/solve.c
@@ -0,0 +1,81 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#define FORLINE                                                                                    \
+	char *line = NULL;                                                                         \
+	size_t len = 0;                                                                            \
+	while (getline(&line, &len, fp) != EOF)
+#define FREELINE                                                                                   \
+	if (line)                                                                                  \
+	free(line)
+
+#define SIZE 1024
+static void solve(FILE *fp)
+{
+	int one = 0, two = 0; // Parts
+
+	int *straight = calloc(4, SIZE * SIZE);
+	int *diagonal = calloc(4, SIZE * SIZE);
+
+	FORLINE
+	{
+		int x1, y1, x2, y2;
+		sscanf(line, "%d,%d -> %d,%d\n", &x1, &y1, &x2, &y2);
+
+		int xstart = x1 <= x2 ? x1 : x2;
+		int xend = x1 >= x2 ? x1 : x2;
+
+		if (x1 == x2 || y1 == y2) { // Straight
+			int ystart = y1 <= y2 ? y1 : y2;
+			int yend = y1 >= y2 ? y1 : y2;
+
+			for (int y = ystart; y <= yend; y++) {
+				for (int x = xstart; x <= xend; x++) {
+					straight[y * SIZE + x]++;
+					diagonal[y * SIZE + x]++;
+				}
+			}
+		} else { // Diagonal
+			int xneg = x1 > x2 ? -1 : 1;
+			int yneg = y1 > y2 ? -1 : 1;
+			for (int a = 0; xstart + a <= xend; a++)
+				diagonal[(y1 + a * yneg) * SIZE + (x1 + a * xneg)]++;
+		}
+	}
+	FREELINE;
+
+	for (int y = 0; y < SIZE; y++) {
+		for (int x = 0; x < SIZE; x++) {
+			if (straight[y * SIZE + x] >= 2)
+				one++;
+			if (diagonal[y * SIZE + x] >= 2)
+				two++;
+		}
+	}
+
+	free(straight);
+	free(diagonal);
+
+	printf("%d\n", one);
+	printf("%d\n", two);
+}
+
+int main(int argc, char *argv[])
+{
+	(void)argc;
+	(void)argv;
+
+	FILE *fp = fopen("input", "r");
+	if (!fp)
+		exit(EXIT_FAILURE);
+
+	clock_t tic = clock();
+	solve(fp);
+	clock_t toc = clock();
+	printf("TIME: %f seconds\n", (double)(toc - tic) / CLOCKS_PER_SEC);
+
+	fclose(fp);
+	return 0;
+}