diff --git a/05/input.txt b/05/input.txt
new file mode 100644
index 0000000..1385e09
--- /dev/null
+++ b/05/input.txt
@@ -0,0 +1,500 @@
+452,244 -> 452,303
+958,109 -> 958,639
+809,31 -> 778,31
+927,139 -> 917,139
+56,298 -> 273,298
+959,53 -> 959,739
+80,255 -> 434,255
+750,500 -> 73,500
+528,920 -> 428,820
+455,552 -> 289,718
+800,363 -> 800,25
+688,745 -> 688,696
+364,41 -> 364,351
+693,642 -> 693,67
+564,143 -> 755,143
+622,682 -> 622,869
+311,515 -> 311,120
+210,255 -> 210,363
+66,550 -> 540,550
+243,485 -> 381,623
+321,712 -> 680,712
+549,501 -> 70,22
+357,893 -> 823,893
+797,882 -> 536,621
+389,724 -> 389,329
+859,75 -> 859,591
+195,618 -> 161,618
+508,668 -> 974,202
+543,871 -> 889,525
+99,659 -> 371,387
+602,553 -> 547,553
+98,930 -> 98,683
+741,522 -> 895,522
+143,636 -> 683,636
+56,751 -> 56,555
+696,117 -> 784,117
+625,827 -> 277,827
+908,633 -> 213,633
+482,290 -> 256,290
+717,566 -> 717,923
+258,34 -> 728,34
+862,54 -> 862,869
+57,983 -> 987,53
+749,712 -> 715,678
+342,291 -> 147,291
+48,308 -> 48,600
+44,749 -> 823,749
+671,533 -> 944,533
+848,804 -> 315,804
+960,310 -> 980,310
+730,426 -> 730,330
+85,633 -> 690,28
+432,791 -> 692,531
+217,128 -> 217,763
+205,275 -> 781,851
+207,329 -> 201,329
+338,724 -> 338,783
+434,89 -> 501,89
+812,298 -> 812,480
+299,190 -> 752,190
+441,301 -> 441,872
+643,913 -> 643,21
+518,204 -> 518,442
+730,601 -> 930,601
+352,268 -> 766,268
+444,55 -> 444,372
+240,914 -> 656,498
+507,858 -> 507,581
+246,805 -> 805,805
+955,960 -> 381,386
+828,128 -> 818,128
+218,775 -> 557,436
+896,529 -> 173,529
+523,338 -> 581,338
+972,203 -> 770,203
+515,635 -> 728,848
+852,380 -> 852,469
+963,829 -> 688,829
+320,161 -> 234,161
+517,531 -> 919,933
+971,75 -> 578,75
+244,666 -> 244,308
+640,311 -> 164,787
+373,311 -> 373,611
+50,784 -> 653,181
+770,93 -> 96,767
+30,19 -> 887,876
+964,860 -> 447,343
+436,645 -> 436,813
+10,11 -> 982,983
+907,638 -> 907,979
+453,864 -> 453,246
+578,132 -> 757,132
+55,456 -> 548,456
+127,626 -> 493,626
+816,14 -> 748,14
+938,873 -> 938,478
+315,374 -> 902,961
+137,386 -> 137,478
+121,954 -> 702,373
+92,874 -> 714,252
+521,660 -> 34,660
+677,401 -> 531,401
+55,278 -> 331,278
+400,263 -> 426,237
+236,974 -> 236,545
+579,30 -> 579,198
+886,257 -> 320,823
+53,67 -> 922,936
+374,773 -> 470,773
+241,115 -> 241,61
+206,252 -> 519,565
+388,617 -> 388,778
+423,315 -> 978,315
+616,759 -> 174,317
+770,511 -> 770,487
+118,258 -> 309,258
+320,908 -> 320,433
+71,358 -> 50,337
+37,461 -> 175,323
+374,758 -> 374,96
+268,139 -> 268,785
+72,484 -> 364,484
+937,286 -> 574,286
+554,602 -> 554,475
+677,863 -> 245,863
+975,33 -> 54,954
+557,960 -> 560,957
+989,892 -> 175,78
+447,47 -> 830,430
+407,718 -> 634,945
+418,304 -> 418,103
+890,278 -> 890,915
+449,619 -> 243,825
+798,661 -> 137,661
+796,251 -> 67,980
+122,88 -> 122,518
+505,407 -> 695,217
+447,961 -> 447,524
+608,708 -> 390,708
+110,636 -> 878,636
+376,517 -> 376,409
+400,213 -> 767,213
+369,220 -> 369,203
+141,934 -> 921,154
+808,243 -> 808,983
+529,923 -> 529,438
+399,324 -> 350,324
+632,83 -> 276,83
+254,632 -> 812,74
+981,594 -> 453,594
+30,893 -> 472,893
+22,355 -> 614,355
+519,732 -> 519,911
+392,425 -> 392,710
+987,953 -> 987,82
+519,108 -> 370,108
+52,897 -> 52,449
+17,83 -> 913,979
+612,305 -> 118,799
+225,365 -> 225,639
+878,928 -> 45,95
+238,279 -> 908,279
+352,27 -> 352,572
+72,11 -> 347,286
+332,195 -> 332,189
+273,726 -> 204,726
+401,817 -> 498,817
+118,170 -> 118,675
+924,868 -> 528,472
+721,948 -> 886,948
+735,379 -> 331,379
+256,298 -> 256,187
+600,886 -> 314,886
+937,275 -> 937,385
+840,777 -> 92,29
+844,96 -> 844,691
+833,597 -> 833,762
+475,138 -> 475,207
+32,984 -> 675,984
+101,528 -> 101,497
+884,399 -> 302,981
+178,124 -> 670,616
+363,84 -> 527,84
+744,784 -> 336,784
+588,963 -> 588,543
+298,525 -> 626,525
+610,496 -> 265,496
+648,294 -> 460,106
+859,646 -> 859,867
+469,48 -> 987,566
+273,689 -> 103,859
+556,745 -> 440,745
+44,923 -> 941,26
+569,777 -> 781,565
+791,408 -> 276,923
+289,185 -> 289,608
+866,783 -> 760,783
+302,153 -> 420,35
+45,545 -> 479,979
+309,54 -> 850,54
+36,48 -> 973,985
+698,671 -> 129,102
+778,339 -> 587,339
+114,566 -> 114,621
+747,450 -> 583,286
+558,698 -> 558,912
+60,43 -> 987,970
+770,243 -> 770,490
+58,811 -> 58,131
+839,364 -> 839,614
+833,633 -> 833,208
+685,441 -> 600,526
+919,894 -> 769,894
+478,799 -> 601,922
+957,957 -> 237,957
+472,169 -> 472,96
+269,185 -> 269,117
+582,187 -> 582,460
+243,506 -> 722,506
+702,191 -> 125,768
+542,63 -> 542,398
+379,222 -> 920,763
+930,658 -> 930,724
+524,33 -> 524,739
+987,949 -> 50,12
+976,71 -> 852,71
+46,59 -> 921,934
+906,526 -> 906,623
+621,455 -> 621,590
+954,55 -> 954,499
+740,52 -> 740,448
+185,959 -> 937,207
+563,349 -> 261,651
+852,938 -> 114,938
+972,22 -> 16,978
+249,142 -> 199,142
+282,469 -> 282,831
+667,686 -> 685,686
+901,95 -> 901,578
+186,903 -> 336,903
+662,248 -> 99,811
+485,248 -> 833,248
+12,154 -> 734,154
+87,270 -> 760,270
+926,191 -> 799,191
+796,793 -> 451,448
+443,292 -> 625,292
+944,62 -> 944,859
+988,489 -> 374,489
+693,279 -> 693,55
+893,617 -> 893,247
+168,905 -> 910,905
+850,429 -> 773,429
+943,13 -> 364,13
+409,880 -> 409,806
+620,646 -> 567,699
+194,949 -> 194,660
+775,682 -> 775,456
+741,161 -> 581,161
+889,91 -> 42,938
+725,495 -> 273,43
+211,22 -> 897,22
+314,604 -> 562,604
+299,193 -> 914,193
+240,388 -> 612,16
+367,752 -> 367,114
+330,34 -> 931,34
+809,909 -> 809,757
+912,140 -> 224,140
+545,804 -> 503,804
+848,758 -> 848,638
+917,226 -> 538,226
+43,34 -> 43,97
+47,54 -> 47,435
+32,52 -> 843,863
+200,361 -> 398,163
+466,388 -> 705,388
+928,127 -> 104,951
+869,940 -> 869,787
+697,563 -> 167,563
+754,828 -> 754,141
+661,100 -> 968,100
+582,44 -> 582,182
+876,550 -> 876,268
+737,240 -> 27,950
+664,730 -> 633,730
+244,805 -> 228,805
+226,605 -> 211,605
+911,524 -> 548,524
+814,256 -> 889,181
+432,944 -> 432,235
+445,25 -> 445,499
+233,619 -> 91,477
+151,248 -> 880,977
+267,149 -> 317,149
+968,346 -> 968,371
+665,617 -> 665,770
+518,625 -> 518,579
+451,458 -> 628,635
+764,442 -> 255,442
+240,363 -> 680,803
+443,153 -> 863,153
+674,880 -> 973,581
+876,236 -> 876,817
+569,335 -> 569,907
+74,400 -> 74,679
+495,804 -> 827,472
+182,76 -> 832,726
+376,370 -> 986,370
+986,233 -> 541,233
+386,379 -> 386,837
+624,637 -> 454,637
+844,866 -> 179,201
+392,89 -> 627,89
+559,326 -> 525,326
+681,188 -> 418,188
+796,386 -> 796,637
+35,72 -> 952,989
+735,873 -> 407,873
+756,238 -> 328,238
+872,284 -> 394,284
+157,873 -> 243,873
+621,657 -> 913,657
+13,42 -> 13,598
+831,725 -> 831,270
+944,51 -> 87,908
+409,820 -> 913,316
+250,323 -> 622,323
+435,397 -> 435,409
+691,198 -> 691,952
+302,352 -> 872,352
+370,790 -> 362,790
+114,74 -> 926,74
+561,273 -> 561,169
+240,658 -> 240,584
+677,357 -> 557,477
+480,796 -> 544,732
+981,568 -> 319,568
+63,928 -> 957,34
+715,145 -> 81,779
+918,554 -> 292,554
+943,550 -> 943,23
+425,477 -> 277,329
+428,718 -> 428,612
+213,647 -> 244,616
+549,610 -> 549,39
+433,330 -> 433,922
+903,921 -> 148,166
+357,706 -> 913,150
+990,254 -> 990,368
+937,47 -> 937,34
+868,86 -> 260,694
+919,905 -> 140,126
+256,918 -> 980,194
+880,346 -> 331,895
+706,392 -> 706,328
+283,986 -> 758,511
+967,106 -> 123,106
+486,92 -> 486,47
+298,338 -> 888,928
+665,767 -> 987,767
+139,898 -> 139,94
+257,808 -> 257,388
+865,631 -> 865,624
+168,913 -> 168,984
+848,936 -> 197,285
+195,249 -> 764,249
+117,900 -> 249,900
+813,130 -> 10,933
+693,81 -> 693,554
+595,448 -> 987,840
+293,140 -> 904,751
+198,289 -> 234,289
+714,671 -> 989,396
+161,600 -> 161,465
+458,955 -> 807,955
+485,124 -> 485,835
+352,911 -> 691,911
+896,949 -> 103,156
+618,171 -> 618,847
+563,887 -> 44,887
+293,801 -> 293,492
+903,714 -> 651,714
+959,18 -> 265,712
+28,134 -> 851,957
+888,374 -> 647,374
+184,566 -> 184,411
+977,244 -> 926,193
+864,189 -> 427,626
+687,262 -> 700,275
+86,82 -> 891,887
+517,779 -> 517,599
+850,59 -> 256,653
+595,352 -> 595,142
+62,191 -> 618,747
+56,395 -> 124,463
+902,138 -> 418,138
+603,131 -> 185,549
+446,546 -> 446,397
+278,788 -> 916,788
+153,19 -> 707,573
+580,468 -> 502,390
+278,794 -> 447,963
+260,495 -> 315,550
+648,392 -> 726,392
+232,457 -> 633,858
+475,697 -> 740,697
+526,186 -> 526,588
+868,287 -> 868,668
+88,57 -> 88,984
+539,963 -> 539,859
+499,214 -> 963,678
+105,16 -> 937,848
+566,158 -> 566,26
+675,915 -> 675,555
+702,123 -> 360,123
+37,47 -> 120,130
+826,787 -> 79,787
+232,33 -> 833,634
+455,775 -> 455,919
+300,488 -> 300,92
+36,84 -> 36,514
+700,916 -> 700,391
+710,585 -> 710,14
+989,938 -> 120,69
+437,514 -> 437,277
+400,358 -> 400,623
+482,908 -> 802,908
+869,842 -> 53,26
+531,560 -> 180,560
+18,312 -> 18,223
+541,888 -> 541,438
+631,751 -> 631,238
+820,208 -> 192,836
+976,453 -> 561,38
+118,544 -> 318,744
+283,818 -> 283,138
+876,623 -> 327,623
+11,855 -> 283,855
+438,460 -> 145,167
+788,379 -> 250,379
+376,130 -> 890,130
+616,747 -> 538,825
+906,403 -> 906,306
+710,371 -> 710,200
+871,917 -> 629,917
+751,103 -> 345,103
+374,608 -> 641,608
+481,902 -> 198,902
+512,686 -> 590,764
+187,134 -> 949,896
+628,58 -> 170,516
+54,370 -> 23,401
+391,718 -> 523,718
+617,637 -> 448,637
+108,208 -> 233,208
+57,478 -> 633,478
+122,693 -> 734,693
+980,537 -> 980,639
+134,448 -> 134,439
+81,812 -> 515,812
+483,133 -> 215,133
+68,250 -> 68,476
+204,101 -> 204,934
+525,626 -> 924,227
+783,519 -> 373,929
+813,166 -> 813,837
+12,988 -> 988,12
+49,180 -> 46,180
+782,585 -> 782,194
+798,98 -> 459,437
+904,83 -> 333,654
+404,417 -> 404,819
+289,228 -> 431,86
+281,876 -> 964,193
+66,15 -> 66,570
+134,159 -> 784,809
+356,684 -> 442,598
+211,624 -> 572,624
+19,985 -> 986,18
+978,429 -> 978,791
+181,955 -> 832,304
+566,859 -> 566,281
+391,232 -> 535,232
+798,848 -> 17,67
+530,203 -> 530,932
+502,562 -> 287,562
+710,499 -> 451,758
+886,420 -> 163,420
+858,289 -> 632,515
+939,441 -> 939,280
+293,220 -> 444,220
+363,676 -> 159,676
+983,24 -> 46,961
+725,585 -> 154,14
+236,453 -> 467,453
+806,395 -> 806,557
+149,583 -> 149,200
+858,704 -> 858,272
\ No newline at end of file
diff --git a/05/solution_1.c b/05/solution_1.c
new file mode 100644
index 0000000..4721ee0
--- /dev/null
+++ b/05/solution_1.c
@@ -0,0 +1,36 @@
+#include <stdio.h>
+
+int main(void) {
+    FILE *fp = fopen("input.txt", "r");
+    unsigned char map[1000][1000] = {0};
+    unsigned x0, x1, y0, y1;
+    unsigned intersections = 0;
+
+    while (fscanf(fp, "%u,%u -> %u,%u", &x0, &y0, &x1, &y1) == 4) {
+        char inc = 1;
+        if (x0 == x1) {
+            if (y0 > y1)
+                inc = -1;
+            for (unsigned y = y0; y != y1; y += inc) {
+                map[x0][y]++;
+            }
+            map[x0][y1]++;
+        } else if (y0 == y1) {
+            if (x0 > x1)
+                inc = -1;
+            for (unsigned x = x0; x != x1; x += inc) {
+                map[x][y0]++;
+            }
+            map[x1][y0]++;
+        }
+    }
+
+    for (unsigned y = 0; y < 1000; y++) {
+        for (unsigned x = 0; x < 1000; x++) {
+            if (map[x][y] > 1)
+                intersections++;
+        }
+    }
+
+    printf("Answer: %d\n", intersections);
+}
diff --git a/05/solution_2.c b/05/solution_2.c
new file mode 100644
index 0000000..d593176
--- /dev/null
+++ b/05/solution_2.c
@@ -0,0 +1,41 @@
+#include <stdio.h>
+
+int main(void) {
+    FILE *fp = fopen("input.txt", "r");
+    unsigned char map[1000][1000] = {0};
+    unsigned x0, x1, y0, y1;
+    unsigned intersections = 0;
+
+    while (fscanf(fp, "%u,%u -> %u,%u", &x0, &y0, &x1, &y1) == 4) {
+        char incY = y0 < y1 ? 1 : -1;
+        char incX = x0 < x1 ? 1 : -1;
+        if (x0 == x1) {
+            for (unsigned y = y0; y != y1; y += incY) {
+                map[x0][y]++;
+            }
+            map[x0][y1]++;
+        } else if (y0 == y1) {
+            for (unsigned x = x0; x != x1; x += incX) {
+                map[x][y0]++;
+            }
+            map[x1][y0]++;
+        } else {
+            unsigned x = x0, y = y0;
+            while (x != x1 && y != y1) {
+                map[x][y]++;
+                x += incX;
+                y += incY;
+            }
+            map[x][y]++;
+        }
+    }
+
+    for (unsigned y = 0; y < 1000; y++) {
+        for (unsigned x = 0; x < 1000; x++) {
+            if (map[x][y] > 1)
+                intersections++;
+        }
+    }
+
+    printf("Answer: %d\n", intersections);
+}