aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rwxr-xr-x2021/day13/day13bin0 -> 90440 bytes
-rw-r--r--2021/day13/day13.cpp99
-rw-r--r--2021/day13/day13_input.txt900
-rw-r--r--2021/day13/day13_input_ez.txt21
-rw-r--r--2021/day13/makefile2
5 files changed, 1022 insertions, 0 deletions
diff --git a/2021/day13/day13 b/2021/day13/day13
new file mode 100755
index 0000000..0d614ac
--- /dev/null
+++ b/2021/day13/day13
Binary files differ
diff --git a/2021/day13/day13.cpp b/2021/day13/day13.cpp
new file mode 100644
index 0000000..65f852f
--- /dev/null
+++ b/2021/day13/day13.cpp
@@ -0,0 +1,99 @@
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <string>
+#include "../utils.h"
+
+class Fold {
+ public: Fold(bool axis, int i) : axis(axis), i(i) { }
+ int i; bool axis;
+};
+
+class Dot {
+ public: Dot(int x, int y) : x(x), y(y) { }
+ int x, y;
+};
+
+
+void show (std::vector<Dot> dots, bool vis) {
+ int minx = 99999, maxx = -99999;
+ int miny = 99999, maxy = -99999;
+ for (Dot dot : dots) {
+ minx = std::min(minx, dot.x);
+ miny = std::min(miny, dot.y);
+ maxx = std::max(maxx, dot.x);
+ maxy = std::max(maxy, dot.y);
+ }
+ int count = 0;
+ int sizex = maxx-minx+1;
+ int sizey = maxy-miny+1;
+ for (int y=0; y<sizey; y++) {
+ for (int x=0; x<sizex; x++) {
+ bool occ = false;
+ for (Dot dot : dots) {
+ if (dot.x == x && dot.y == y) {
+ occ = true; break;
+ }
+ }
+ if (occ) {
+ count ++;
+ if (vis) std::cout << "#";
+ }
+ else if (vis) std::cout << ".";
+ }
+ if (vis) std::cout << std::endl;
+ }
+
+ std::cout << "dots remaining: " << count << std::endl;
+}
+
+void fold (std::vector<Dot> &dots, Fold f) {
+ for (Dot &dot : dots) {
+ if (f.axis) {
+ int dist = f.i - dot.x;
+ if (dist < 0) dot.x = f.i + dist;
+ }
+ else {
+ int dist = f.i - dot.y;
+ if (dist < 0) dot.y = f.i + dist;
+ }
+ }
+}
+
+int main (int argc, char * argv[]) {
+ std::string raw;
+ std::getline(std::ifstream(argv[1]), raw, '\0');
+ std::vector<std::string> parts, strdots, strfolds;
+ split(parts, raw, "\n\n");
+ split(strdots, parts[0], "\n");
+ split(strfolds, parts[1], "\n");
+
+ std::vector<Dot> dots;
+ for (auto strdot : strdots) {
+ std::vector<std::string> xy;
+ split(xy, strdot, ",");
+ dots.emplace_back(
+ std::stoi(xy[0]),
+ std::stoi(xy[1]));
+ }
+
+ std::vector<Fold> folds;
+ for (auto strfold : strfolds) {
+ if (strfold.size() == 0) continue;
+ std::vector<std::string> com;
+ split(com, strfold, "=");
+ folds.emplace_back(
+ com[0] == "fold along x",
+ std::stoi(com[1]));
+ }
+
+ int iter = folds.size();
+ if (argc > 2) iter = atoi(argv[2]);
+ for (Fold f : folds) {
+ fold(dots, f);
+ }
+ show(dots, true);
+
+
+ return 0;
+}
diff --git a/2021/day13/day13_input.txt b/2021/day13/day13_input.txt
new file mode 100644
index 0000000..4d2f146
--- /dev/null
+++ b/2021/day13/day13_input.txt
@@ -0,0 +1,900 @@
+23,123
+1116,117
+60,18
+954,323
+1235,226
+1123,599
+862,231
+808,11
+982,687
+574,248
+1041,449
+584,105
+408,575
+594,466
+1058,677
+23,33
+127,862
+1305,367
+87,220
+194,855
+706,455
+550,241
+750,493
+922,616
+88,861
+682,822
+487,359
+1208,555
+579,674
+1097,266
+1042,400
+1043,712
+567,151
+328,694
+494,47
+1,623
+716,779
+574,198
+599,890
+63,532
+818,728
+1148,239
+104,848
+1062,47
+1185,516
+428,849
+1134,519
+472,866
+1146,207
+785,541
+75,668
+636,306
+554,512
+644,362
+795,623
+263,810
+805,0
+223,409
+150,129
+858,857
+356,571
+895,488
+962,106
+761,151
+1121,507
+903,786
+1097,852
+295,726
+1118,330
+1016,115
+930,291
+808,435
+1123,847
+957,243
+977,371
+492,207
+654,229
+1285,401
+560,401
+94,65
+1110,110
+492,840
+922,242
+798,248
+252,257
+333,819
+410,855
+1218,800
+157,582
+176,519
+1001,390
+843,599
+572,185
+875,9
+383,697
+310,369
+731,220
+770,600
+638,861
+284,599
+950,779
+927,4
+949,729
+493,712
+105,66
+989,527
+68,65
+743,743
+862,103
+681,744
+855,32
+216,519
+1054,592
+551,854
+482,651
+1009,651
+408,319
+967,596
+276,23
+898,819
+654,205
+88,413
+353,722
+1263,407
+1140,553
+1228,864
+435,697
+763,505
+817,182
+301,620
+67,203
+448,663
+575,254
+736,78
+378,103
+154,427
+858,37
+852,628
+1228,870
+113,714
+929,523
+68,737
+212,250
+893,343
+438,71
+713,439
+636,361
+624,599
+31,714
+579,519
+346,533
+830,429
+718,142
+817,574
+1048,145
+430,71
+930,689
+161,320
+689,486
+346,197
+75,226
+1103,376
+114,294
+26,854
+912,302
+452,185
+870,327
+152,429
+1128,890
+711,645
+509,35
+170,553
+326,687
+1004,788
+92,773
+907,488
+94,493
+825,683
+823,298
+296,74
+565,343
+1225,837
+746,763
+566,497
+719,138
+674,140
+565,791
+1031,25
+756,382
+572,750
+970,312
+661,527
+478,631
+385,445
+940,599
+343,596
+490,217
+242,371
+266,779
+267,485
+437,259
+984,709
+957,401
+908,257
+1208,339
+472,25
+1148,207
+80,528
+602,155
+256,766
+300,822
+266,331
+703,745
+1196,824
+657,271
+105,599
+612,373
+594,690
+25,172
+750,829
+442,376
+1153,582
+741,389
+818,168
+120,103
+105,295
+497,312
+395,467
+274,801
+672,33
+497,582
+1200,179
+378,455
+855,862
+1197,714
+1059,889
+698,344
+472,28
+1016,779
+597,147
+899,304
+395,469
+306,340
+1310,431
+1146,640
+1074,315
+500,427
+108,166
+959,175
+1240,302
+1260,730
+1016,180
+1221,103
+846,70
+480,569
+161,350
+440,567
+199,338
+1160,71
+1098,518
+410,487
+922,278
+80,590
+1284,854
+518,182
+448,215
+818,743
+370,295
+657,719
+1020,84
+1193,703
+604,791
+55,249
+801,511
+1093,784
+813,771
+1089,887
+1052,487
+920,736
+176,263
+1246,525
+460,295
+226,493
+872,715
+820,239
+761,131
+739,182
+556,329
+1235,648
+437,612
+815,410
+160,847
+1292,82
+1235,668
+1178,599
+892,763
+343,148
+738,127
+1061,249
+935,645
+433,887
+1131,746
+925,893
+873,730
+194,151
+1136,17
+200,784
+744,145
+607,697
+1240,105
+686,329
+244,870
+700,586
+575,640
+1109,49
+1016,107
+518,614
+724,65
+800,138
+224,823
+952,341
+1230,366
+410,821
+455,191
+1168,218
+1016,787
+206,7
+922,204
+120,93
+70,275
+382,504
+247,152
+571,712
+1150,651
+1098,376
+92,121
+520,11
+766,295
+161,847
+731,648
+674,533
+1173,59
+1206,166
+75,815
+838,28
+547,284
+1059,375
+873,110
+865,639
+982,709
+213,852
+1044,375
+1149,126
+333,371
+1149,847
+790,235
+790,424
+1148,280
+430,451
+492,743
+798,218
+930,205
+706,791
+1039,4
+1230,360
+1066,463
+301,651
+1068,819
+594,39
+1066,487
+567,562
+202,37
+649,771
+147,298
+1001,607
+370,599
+1218,773
+654,431
+5,571
+32,474
+649,99
+596,877
+1156,427
+1305,323
+694,261
+1228,30
+634,19
+87,444
+360,740
+291,423
+1150,847
+5,435
+199,556
+1014,74
+300,166
+879,409
+18,809
+266,107
+796,848
+1228,278
+810,651
+1148,640
+689,802
+857,180
+251,599
+1151,87
+403,406
+1205,831
+358,341
+30,372
+795,271
+775,824
+1223,599
+279,25
+1255,249
+907,182
+1208,4
+1059,22
+251,630
+515,795
+817,798
+748,374
+80,78
+162,726
+402,257
+68,267
+1292,361
+142,676
+1248,528
+120,175
+190,376
+676,19
+470,646
+32,698
+1263,597
+502,667
+1149,544
+488,495
+1134,631
+1128,442
+1294,481
+102,339
+403,712
+756,512
+1205,105
+1034,455
+698,550
+878,196
+1059,630
+1253,455
+709,707
+328,872
+1146,616
+795,520
+498,161
+492,54
+1064,870
+388,876
+306,788
+83,182
+852,644
+1243,649
+962,340
+713,893
+631,439
+837,623
+314,312
+1094,519
+1120,518
+540,152
+957,722
+145,35
+1230,590
+353,493
+564,539
+1310,17
+1134,263
+1171,679
+801,859
+679,571
+390,736
+30,522
+1222,481
+346,362
+110,715
+556,565
+739,712
+932,775
+818,463
+813,562
+351,271
+760,512
+930,603
+1009,620
+875,197
+294,107
+800,756
+761,295
+754,117
+985,240
+843,123
+430,823
+1183,862
+596,46
+873,612
+1173,271
+49,42
+1190,175
+575,780
+1252,877
+493,126
+246,814
+370,792
+636,140
+888,513
+668,877
+1168,676
+1278,698
+1039,325
+515,495
+353,274
+736,304
+801,280
+67,691
+1173,835
+552,787
+417,343
+1208,611
+503,366
+1066,95
+1285,72
+1128,4
+547,616
+380,205
+62,116
+952,820
+656,431
+218,215
+716,428
+741,421
+1034,23
+125,516
+1248,401
+1261,852
+540,742
+422,381
+161,544
+395,427
+1044,204
+268,429
+900,407
+465,620
+989,819
+1298,358
+266,519
+1138,651
+607,197
+1158,883
+452,37
+110,599
+518,56
+713,455
+1033,614
+1160,765
+990,301
+982,648
+877,763
+251,648
+845,835
+638,481
+277,614
+525,353
+880,778
+385,595
+1247,810
+629,296
+351,207
+967,148
+1021,845
+1287,123
+1230,78
+1309,623
+378,775
+445,703
+85,841
+1015,714
+328,246
+1240,773
+838,4
+908,665
+686,388
+996,312
+843,151
+264,158
+714,46
+308,85
+412,819
+957,493
+1059,246
+377,311
+1026,102
+711,281
+1203,389
+925,445
+353,401
+893,327
+610,819
+52,801
+259,467
+388,564
+1197,628
+100,717
+950,714
+893,567
+266,375
+668,536
+127,639
+808,465
+744,397
+852,451
+55,4
+818,239
+892,131
+1009,274
+855,480
+518,824
+1223,295
+33,817
+822,495
+977,523
+1002,697
+748,520
+1290,467
+25,822
+251,246
+1041,893
+1059,488
+161,768
+816,847
+249,249
+880,823
+408,304
+388,690
+1248,569
+594,652
+16,481
+1305,459
+74,677
+136,166
+119,518
+623,180
+458,266
+251,519
+388,151
+708,801
+951,266
+1196,294
+177,336
+1158,459
+1160,317
+1191,471
+296,777
+1098,250
+1063,742
+703,597
+1101,221
+612,344
+1190,353
+679,439
+892,315
+1272,485
+850,295
+64,369
+872,519
+293,481
+535,423
+852,3
+838,866
+1036,291
+902,192
+1004,340
+656,229
+258,407
+201,845
+50,455
+1231,192
+714,848
+330,502
+60,428
+137,274
+381,355
+94,519
+838,476
+1178,71
+761,383
+584,789
+246,575
+982,694
+437,784
+489,488
+1235,465
+1228,37
+679,887
+1044,71
+895,854
+1103,518
+855,191
+718,752
+1212,677
+549,579
+162,239
+1279,180
+584,856
+1190,599
+1059,599
+544,715
+890,542
+1150,47
+862,64
+246,870
+1064,360
+586,737
+922,330
+1230,95
+673,831
+1000,77
+55,697
+731,519
+928,390
+624,372
+1087,409
+616,485
+1101,255
+189,620
+1019,526
+1174,182
+562,374
+549,131
+403,488
+403,441
+152,883
+169,582
+1223,220
+952,74
+607,297
+187,599
+251,872
+621,408
+433,7
+939,87
+85,837
+102,283
+689,856
+82,864
+801,35
+566,749
+410,521
+259,873
+1093,612
+344,677
+364,810
+85,57
+1088,205
+1247,362
+75,648
+705,42
+156,553
+139,99
+808,429
+247,332
+817,768
+902,543
+873,259
+684,771
+502,435
+850,487
+1235,815
+716,652
+64,525
+120,295
+1173,274
+574,534
+1140,789
+525,541
+1230,304
+92,374
+1285,722
+113,628
+277,280
+888,401
+688,628
+330,392
+12,877
+402,637
+216,375
+852,266
+903,376
+838,869
+1205,63
+1064,319
+817,350
+177,560
+877,7
+1280,295
+890,32
+510,866
+408,360
+433,763
+764,679
+75,79
+221,828
+410,463
+1174,630
+954,123
+28,571
+740,814
+587,691
+1206,868
+217,784
+621,861
+602,603
+1212,217
+120,541
+432,196
+382,390
+915,469
+67,649
+959,719
+82,687
+502,121
+1242,65
+514,848
+1160,711
+862,887
+653,271
+1218,374
+152,569
+681,296
+957,274
+810,427
+473,271
+411,590
+649,123
+294,180
+982,872
+221,66
+271,773
+550,512
+766,179
+546,215
+159,484
+432,56
+321,527
+689,408
+748,800
+348,106
+70,302
+478,183
+656,241
+458,331
+246,80
+276,455
+1026,743
+1250,18
+62,528
+964,197
+340,582
+266,115
+49,852
+575,562
+206,887
+223,485
+1278,180
+218,231
+107,697
+724,157
+989,371
+908,637
+1242,829
+32,180
+922,652
+738,750
+137,59
+751,245
+875,726
+82,633
+112,7
+
+fold along x=655
+fold along y=447
+fold along x=327
+fold along y=223
+fold along x=163
+fold along y=111
+fold along x=81
+fold along y=55
+fold along x=40
+fold along y=27
+fold along y=13
+fold along y=6
diff --git a/2021/day13/day13_input_ez.txt b/2021/day13/day13_input_ez.txt
new file mode 100644
index 0000000..282114c
--- /dev/null
+++ b/2021/day13/day13_input_ez.txt
@@ -0,0 +1,21 @@
+6,10
+0,14
+9,10
+0,3
+10,4
+4,11
+6,0
+6,12
+4,1
+0,13
+10,12
+3,4
+3,0
+8,4
+1,10
+2,14
+8,10
+9,0
+
+fold along y=7
+fold along x=5
diff --git a/2021/day13/makefile b/2021/day13/makefile
new file mode 100644
index 0000000..02a6cb9
--- /dev/null
+++ b/2021/day13/makefile
@@ -0,0 +1,2 @@
+all day13.cpp:
+ g++ -std=c++20 -o day13 day13.cpp