Day 5

d05.go

@@ -0,0 +1,165 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+    "strconv"
+)
+
+type maprange struct {
+    src uint64
+    dst uint64
+} 
+
+type mapdir struct {
+	src string
+	dst string
+}
+
+type mapval struct {
+    cunt uint64
+    rnge maprange
+}
+
+type mapping struct {
+    dir mapdir
+    val []mapval
+}
+
+func main() {
+	f, _ := os.Open(os.Args[1])
+	s := bufio.NewScanner(f)
+
+    var maps []mapping
+
+    var init_seeds []uint64
+    inmap := false
+    var curmap mapping
+	for s.Scan() {
+        line := s.Text()
+		switch {
+		case strings.HasPrefix(line, "seeds: "):
+			thing := strings.Split(line[7:], " ")
+            for _, v := range thing {
+                val, _ := strconv.ParseUint(v, 0, 64)
+                init_seeds = append(init_seeds, val)
+            }
+
+		case strings.HasSuffix(line, " map:"):
+            if inmap { maps = append(maps, curmap) }
+            curmap = mapping{}
+            inmap = true
+
+            split1 := strings.Index(line, "-to-")
+            split2 := strings.Index(line, " ")
+            src := line[:split1]
+            dst := line[split1 + 4:split2]
+            curmap.dir.src = src
+            curmap.dir.dst = dst
+
+        case strings.Count(line, " ") >= 2 && inmap:
+            thing := strings.Split(line, " ")
+            var val mapval
+            val.rnge.dst, _ = strconv.ParseUint(thing[0], 0, 64)
+            val.rnge.src, _ = strconv.ParseUint(thing[1], 0, 64)
+            val.cunt, _ = strconv.ParseUint(thing[2], 0, 64)
+            curmap.val = append(curmap.val, val)
+        }
+	}
+    if inmap { maps = append(maps, curmap) }
+
+    seeds := append(make([]uint64, 0, len(init_seeds)), init_seeds...)
+    currency := "seed"
+    for currency != "location" {
+        var map_cur mapping
+        map_found := false
+        for _, v := range maps {
+            if v.dir.src == currency {
+                map_cur = v
+                map_found = true
+                break
+            }
+        }
+        if !map_found { break }
+
+        currency = map_cur.dir.dst
+        for i, v := range seeds {
+            for _, x := range map_cur.val {
+                tmp := v - x.rnge.src
+                if tmp > 0 && tmp < x.cunt {
+                    v += x.rnge.dst - x.rnge.src
+                    break
+                }
+            }
+            seeds[i] = v
+        }
+    }
+
+    minloc := seeds[0]
+    for _, v := range seeds[1:] {
+        if v < minloc { minloc = v }
+    }
+    fmt.Println(minloc)
+
+    seedrnge := make([]maprange, 0)
+    for i, _ := range init_seeds {
+        if i % 2 == 1 { continue }
+        var rnge maprange
+        rnge.src = init_seeds[i + 0]
+        rnge.dst = rnge.src + init_seeds[i + 1]
+        seedrnge = append(seedrnge, rnge)
+    }
+
+    currency = "seed"
+    for currency != "location" {
+        var map_cur mapping
+        map_found := false
+        for _, v := range maps {
+            if v.dir.src == currency {
+                map_cur = v
+                map_found = true
+                break
+            }
+        }
+        if !map_found { break }
+
+        currency = map_cur.dir.dst
+        newseedrnge := make([]maprange, 0)
+        for _, v := range seedrnge {
+            for _, x := range map_cur.val {
+                src := x.rnge.src
+                end := x.rnge.src + x.cunt
+                if src <= v.src && v.src < end && src <= v.dst && v.dst < end {
+                    newseedrnge = append(newseedrnge, maprange{
+                        src: v.src + x.rnge.dst - x.rnge.src,
+                        dst: v.dst + x.rnge.dst - x.rnge.src,
+                    })
+                    v.src = v.dst
+                } else if src <= v.src && v.src < end {
+                    newseedrnge = append(newseedrnge, maprange{
+                        src: v.src + x.rnge.dst - x.rnge.src,
+                        dst: x.rnge.dst + x.cunt,
+                    })
+                    v.src = end
+                } else if src <= v.dst && v.dst < end {
+                    newseedrnge = append(newseedrnge, maprange{
+                        src: x.rnge.dst,
+                        dst: v.dst + x.rnge.dst - x.rnge.src,
+                    })
+                    v.dst = src
+                }
+                if v.src == v.dst { break }
+            }
+            if v.src != v.dst { newseedrnge = append(newseedrnge, v) }
+        }
+        seedrnge = newseedrnge
+    }
+
+    minrnge := seedrnge[0].src
+    for _, v := range seedrnge[1:] {
+        if v.src < minrnge { minrnge = v.src }
+    }
+    fmt.Println(minrnge)
+}

d05_input.txt

@@ -0,0 +1,243 @@
+seeds: 1514493331 295250933 3793791524 105394212 828589016 654882197 658370118 49359719 4055197159 59237418 314462259 268880047 2249227634 74967914 2370414906 38444198 3291001718 85800943 2102534948 5923540
+
+seed-to-soil map:
+3352941879 1247490906 129850502
+1738919961 2189748071 56658550
+1795578511 292133467 518088747
+1519757661 1666834550 130335907
+1650093568 133993362 88826393
+2813914030 2262539545 40894545
+2698412916 2661705133 115501114
+2854808575 810222214 437268692
+410530961 1545057218 121777332
+0 242661076 10731898
+532308293 2303434090 61476099
+3292077267 1797170457 2282798
+2313667258 0 133993362
+2447660620 2410952837 250752296
+3294360065 253392974 38740493
+10731898 1377341408 167715810
+1457582089 2364910189 46042648
+593784392 3009289500 824592362
+3333100558 222819755 19841321
+1418376754 1799453255 39205335
+1503624737 2246406621 16132924
+178447708 2777206247 232083253
+3482792381 1838658590 351089481
+
+soil-to-fertilizer map:
+3513795976 4258851234 36116062
+3393453635 4148223693 110627541
+3504081176 3494735450 6350258
+2671742993 3596285367 235915393
+991290653 256764866 25867175
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+497570635 143118415 5953302
+3988933187 3907275759 5820029
+4078091981 3835565302 71710457
+1653512846 1506152115 54620517
+
+fertilizer-to-water map:
+3053686523 2028998994 1241280773
+1492748555 1562401968 269616514
+554432178 1000324407 562077561
+2944878746 3270279767 108807777
+2501520804 3379087544 52288887
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+409832614 0 20686928
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+1116509739 500172955 314800245
+2553809691 3903898241 391069055
+0 90340341 409832614
+1434963884 942539736 57784671
+
+water-to-light map:
+2774754469 1598606098 15160294
+3832622498 1469118874 129487224
+4125818569 3997047227 169148727
+1108418694 1130695768 196125912
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+950332770 972609844 158085924
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+1694604677 1613766392 159490849
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+2706794606 2060598388 44205651
+386607659 544443715 110595292
+3962109722 2540862463 21097986
+697311924 0 92263281
+558450415 404456802 11447837
+2409200012 3214176675 110030060
+569898252 862925569 21151670
+1354525884 415904639 55382746
+789575205 790700609 72224960
+3832262624 2690248164 359874
+163757080 181606223 222850579
+1533048301 2967363270 159633610
+497202951 784452458 6248151
+2670296728 3812778318 36497878
+3145382010 2630590393 59657771
+1854095526 2104804039 436058424
+0 655039007 74414138
+2390804262 2690608038 18395750
+1304544606 1326821680 49981278
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+664206252 1376802958 33105672
+74414138 92263281 89342942
+3983207708 2709003788 142610861
+503451102 729453145 54999313
+2290153950 2866712958 100650312
+
+light-to-temperature map:
+2054128675 422374783 216418447
+3729049939 3132111492 565917357
+524183620 1261361039 34450583
+723901655 638793230 74616934
+304496246 795175951 115896188
+1128506994 1008723417 50927515
+958650763 2074746732 3056214
+0 1224918384 36442655
+558634203 1059650932 165267452
+2052385426 713410164 1743249
+833053864 1953862956 120883776
+36442655 715153413 80022538
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+1842022589 1295811622 210362837
+2270547122 2077802946 24477429
+116465193 2102280375 188031053
+1179434509 945607414 63116003
+798518589 911072139 34535275
+3373647615 3893335786 195498774
+3696979816 3698028849 32070123
+1242550512 1892491077 43410067
+3051130577 2566857633 322517038
+3002478931 3844684140 48651646
+2311039190 3730098972 114585168
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+1285960579 103791186 85466201
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+1110545182 1935901144 17961812
+953937640 2290311428 4713123
+420392434 0 103791186
+961706977 189257387 148838205
+3637334768 3072466444 59645048
+3569146389 2498669254 68188379
+2613254422 4088834560 206132736
+
+temperature-to-humidity map:
+2032423062 2486277941 26281270
+333062067 2316624216 6051173
+1716048249 1385455997 91409968
+460397469 2512559211 69041956
+25538975 668468772 15388105
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+529439425 908821722 476634275
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+0 395565252 25538975
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+2058704332 0 32209047
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+40927080 32209047 292134987
+1490276549 2581601167 26098732
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+1079309452 421104227 27455821
+1807458217 683856877 224964845
+339113240 1922431267 121284229
+4155917040 2879640158 139050256
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+1326673997 2452133400 34144541
+3805665741 4211799370 83167926
+
+humidity-to-location map:
+3928575650 3147563455 98804874
+2357899446 2418187254 26586982
+449562184 2261875136 59054833
+308294839 60287808 141267345
+1872062279 1591999301 10857495
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