diff --git a/day5/day5.go b/day5/day5.go
new file mode 100644
index 0000000..5f9762a
--- /dev/null
+++ b/day5/day5.go
@@ -0,0 +1,111 @@
+package day5
+
+import (
+	"fmt"
+	"math"
+	"strings"
+
+	"gitea.paas.celticinfo.fr/oabrivard/aoc2023/utils"
+)
+
+type SrcToDest struct {
+	src int64
+	dst int64
+	rng int64
+}
+
+func buildMapList(start int, lines []string) ([]*SrcToDest, int) {
+	result := []*SrcToDest{}
+
+	for i := start + 1; len(strings.TrimSpace(lines[i])) > 0; i++ {
+		vals := utils.ParseInt64Array(lines[i], " ")
+
+		result = append(result, &SrcToDest{
+			src: vals[1],
+			dst: vals[0],
+			rng: vals[2],
+		})
+	}
+
+	/*
+		sort.SliceStable(result, func(i, j int) bool {
+			return result[i].src < result[j].src
+		})
+	*/
+
+	return result, start + len(result) + 2
+}
+
+func srcToDest(src int64, stdList []*SrcToDest) int64 {
+	for _, std := range stdList {
+		if std.src <= src && src <= std.src+std.rng {
+			return src + std.dst - std.src
+		}
+	}
+
+	return src
+}
+
+func FindClosestLocation(lines []string) int64 {
+	seeds := utils.ParseInt64Array(strings.TrimPrefix(lines[0], "seeds: "), " ")
+
+	seedToSoil, i := buildMapList(2, lines)
+	soilToFert, i := buildMapList(i, lines)
+	fertToWater, i := buildMapList(i, lines)
+	waterToLight, i := buildMapList(i, lines)
+	lightToTemp, i := buildMapList(i, lines)
+	tempToHumid, i := buildMapList(i, lines)
+	humidToLoc, _ := buildMapList(i, lines)
+
+	result := int64(math.MaxInt64)
+
+	for _, seed := range seeds {
+		d1 := srcToDest(seed, seedToSoil)
+		d2 := srcToDest(d1, soilToFert)
+		d3 := srcToDest(d2, fertToWater)
+		d4 := srcToDest(d3, waterToLight)
+		d5 := srcToDest(d4, lightToTemp)
+		d6 := srcToDest(d5, tempToHumid)
+		d7 := srcToDest(d6, humidToLoc)
+
+		if d7 < result {
+			result = d7
+		}
+	}
+
+	return result
+}
+
+func FindRangedClosestLocation(lines []string) int64 {
+	seeds := utils.ParseInt64Array(strings.TrimPrefix(lines[0], "seeds: "), " ")
+
+	seedToSoil, i := buildMapList(2, lines)
+	soilToFert, i := buildMapList(i, lines)
+	fertToWater, i := buildMapList(i, lines)
+	waterToLight, i := buildMapList(i, lines)
+	lightToTemp, i := buildMapList(i, lines)
+	tempToHumid, i := buildMapList(i, lines)
+	humidToLoc, _ := buildMapList(i, lines)
+
+	result := int64(math.MaxInt64)
+
+	count := 0
+	for i := 0; i < len(seeds); i += 2 {
+		count++
+		for seed := seeds[i]; seed < seeds[i]+seeds[i+1]; seed++ {
+			d1 := srcToDest(seed, seedToSoil)
+			d2 := srcToDest(d1, soilToFert)
+			d3 := srcToDest(d2, fertToWater)
+			d4 := srcToDest(d3, waterToLight)
+			d5 := srcToDest(d4, lightToTemp)
+			d6 := srcToDest(d5, tempToHumid)
+			d7 := srcToDest(d6, humidToLoc)
+
+			if d7 < result {
+				result = d7
+			}
+		}
+		fmt.Println("seed roots done:", count)
+	}
+	return result
+}
diff --git a/day5/day5_test.go b/day5/day5_test.go
new file mode 100644
index 0000000..14ffb65
--- /dev/null
+++ b/day5/day5_test.go
@@ -0,0 +1,115 @@
+package day5
+
+import (
+	"testing"
+
+	"gitea.paas.celticinfo.fr/oabrivard/aoc2023/utils"
+)
+
+func TestFindClosestLocation(t *testing.T) {
+	lines := []string{
+		"seeds: 79 14 55 13",
+		"",
+		"seed-to-soil map:",
+		"50 98 2",
+		"52 50 48",
+		"",
+		"soil-to-fertilizer map:",
+		"0 15 37",
+		"37 52 2",
+		"39 0 15",
+		"",
+		"fertilizer-to-water map:",
+		"49 53 8",
+		"0 11 42",
+		"42 0 7",
+		"57 7 4",
+		"",
+		"water-to-light map:",
+		"88 18 7",
+		"18 25 70",
+		"",
+		"light-to-temperature map:",
+		"45 77 23",
+		"81 45 19",
+		"68 64 13",
+		"",
+		"temperature-to-humidity map:",
+		"0 69 1",
+		"1 0 69",
+		"",
+		"humidity-to-location map:",
+		"60 56 37",
+		"56 93 4",
+		"",
+	}
+
+	result := FindClosestLocation(lines)
+
+	if result != int64(35) {
+		t.Fatalf("expected 35, got %v", result)
+	}
+}
+
+func TestFindClosestLocationWithInput(t *testing.T) {
+	lines := utils.ReadLines("input.txt")
+	result := FindClosestLocation(lines)
+
+	if result != 1181555926 {
+		t.Fatalf("expected 1181555926, got %d", result)
+	}
+}
+
+func TestRangedFindClosestLocation(t *testing.T) {
+	lines := []string{
+		"seeds: 79 14 55 13",
+		"",
+		"seed-to-soil map:",
+		"50 98 2",
+		"52 50 48",
+		"",
+		"soil-to-fertilizer map:",
+		"0 15 37",
+		"37 52 2",
+		"39 0 15",
+		"",
+		"fertilizer-to-water map:",
+		"49 53 8",
+		"0 11 42",
+		"42 0 7",
+		"57 7 4",
+		"",
+		"water-to-light map:",
+		"88 18 7",
+		"18 25 70",
+		"",
+		"light-to-temperature map:",
+		"45 77 23",
+		"81 45 19",
+		"68 64 13",
+		"",
+		"temperature-to-humidity map:",
+		"0 69 1",
+		"1 0 69",
+		"",
+		"humidity-to-location map:",
+		"60 56 37",
+		"56 93 4",
+		"",
+	}
+
+	result := FindRangedClosestLocation(lines)
+
+	if result != int64(46) {
+		t.Fatalf("expected 46, got %v", result)
+	}
+}
+
+func TestRangedFindClosestLocationWithInput(t *testing.T) {
+	lines := utils.ReadLines("input.txt")
+	result := FindRangedClosestLocation(lines)
+
+	if result != 1181555926 {
+		t.Fatalf("expected 1181555926, got %d", result)
+	}
+}
diff --git a/day5/input.txt b/day5/input.txt
new file mode 100644
index 0000000..3b821fa
--- /dev/null
+++ b/day5/input.txt
@@ -0,0 +1,140 @@
+seeds: 364807853 408612163 302918330 20208251 1499552892 200291842 3284226943 16030044 2593569946 345762334 3692780593 17215731 1207118682 189983080 2231594291 72205975 3817565407 443061598 2313976854 203929368
+
+seed-to-soil map:
+2069473506 3732587455 1483883
+3235691256 2348990120 6550341
+3547561069 1392195671 747406227
+3264251584 3734071338 283309485
+391285622 257757572 195552540
+1645243555 3166958320 377191689
+335002083 512210869 56283539
+3242241597 897735089 22009987
+77244511 0 257757572
+989159646 4172023334 122943962
+605476380 3544150009 188437446
+0 568494408 18343754
+2700122696 4050276683 121746651
+2022435244 2139601898 47038262
+2227672101 919745076 95840269
+1112103608 2633818373 533139947
+826809686 2186640160 162349960
+3100147259 762191092 135543997
+18343754 453310112 58900757
+2323512370 1015585345 282396986
+2605909356 1297982331 94213340
+2821869347 2355540461 278277912
+793913826 4017380823 32895860
+2070957389 605476380 156714712
+
+soil-to-fertilizer map:
+2700214958 2743391193 363795571
+1484584575 1440072796 24660284
+927520818 435059068 191969051
+1588488926 1434420334 5652462
+1423277199 141187887 5443857
+1594141388 1350997453 83422881
+1986188257 3933008893 120750463
+1509244859 146631744 79093544
+3712482038 4220862006 74105290
+3948206286 1986188257 277570873
+291046304 281588807 153470261
+1119489869 918224946 303787330
+1677564269 1321192605 29804848
+2309878676 2336743687 390336282
+3079951473 3306332300 449116691
+444516565 1222012276 99180329
+543696894 1464733080 383823924
+3895169406 3771389935 53036880
+3529068164 4053759356 167102650
+0 627178642 291046304
+3696170814 2727079969 16311224
+3855550220 3824426815 39619186
+2106938720 3107186764 199145536
+1428721056 225725288 55863519
+1707369117 0 64378064
+1771747181 64378064 76809823
+3064010529 3755448991 15940944
+2306084256 2332949267 3794420
+4225777159 2263759130 69190137
+3786587328 3864046001 68962892
+1588338403 627028119 150523
+
+fertilizer-to-water map:
+2299879115 39069388 7889905
+514481680 504392888 101474410
+3448524168 0 25428313
+13641075 1832356728 472401611
+0 25428313 13641075
+1842445520 108629584 395763304
+486042686 3445513487 28438994
+2307769020 2304758339 1140755148
+2238208824 46959293 61670291
+615956090 605867298 1226489430
+
+water-to-light map:
+1318826171 2010420436 223477535
+2278894745 2233897971 671603259
+988189854 447584401 27746374
+2132052210 300741866 146842535
+0 1279660741 97125596
+3531244480 3147213622 507810286
+257581844 3816963790 101424269
+1298609589 3918388059 20216582
+3317726838 1072550929 21856732
+3065323607 1254863909 4121973
+97125596 1094407661 160456248
+359006113 1057194484 15356445
+374362558 1636971609 104335413
+4039054766 475330775 9209679
+1038424317 1376786337 260185272
+878530050 3938604641 109659804
+1784016098 3738041092 78922698
+3152462764 0 165264074
+1862938796 1741307022 269113414
+497536930 676201364 380993120
+3069445580 3655023908 83017184
+2950498004 165264074 114825603
+1015936228 1258985882 1835900
+478697971 1260821782 18838959
+1017772128 280089677 20652189
+1542303706 2905501230 241712392
+3339583570 484540454 191660910
+
+light-to-temperature map:
+2827696039 489007811 183207687
+1480301347 3744628626 306791400
+695239418 130668965 358338846
+1297125534 2232912413 183175813
+3979319170 1917264287 315648126
+3010903726 948848843 968415444
+130668965 2663473525 564570453
+1053578264 4051420026 243547270
+2303677395 672215498 276633345
+1787092747 3228043978 516584648
+2580310740 2416088226 247385299
+
+temperature-to-humidity map:
+4161466647 3871737509 133500649
+2423686895 2864370860 72123408
+1983529997 0 320533964
+3184295196 2695571092 41928210
+0 822932241 605870242
+3557076981 3267347843 604389666
+3226223406 2936494268 330853575
+2495810303 2737499302 126871558
+1108268519 1428802483 491674128
+605870242 320533964 502398277
+2622681861 2423686895 271884197
+2894566058 4005238158 289729138
+1599942647 1920476611 383587350
+
+humidity-to-location map:
+2945628300 1864953738 334378942
+3467273713 3579654586 715312710
+975015905 1356290883 508662855
+1483678760 2498980024 1080674562
+3443998409 2199332680 23275304
+3280007242 2222607984 163991167
+4182586423 2386599151 112380873
+2564353322 975015905 381274978
+