From 3118d877a3435bdacfcd898bab3b3b1cebafd306 Mon Sep 17 00:00:00 2001
From: HeNine <>
Date: Tue, 7 Dec 2021 07:38:22 +0100
Subject: [PATCH] Day 007

---
 day07/Project.toml    |  4 ++++
 day07/data/case00.txt |  1 +
 day07/data/case01.txt |  1 +
 day07/src/day07.jl    | 55 +++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 61 insertions(+)
 create mode 100644 day07/Project.toml
 create mode 100644 day07/data/case00.txt
 create mode 100644 day07/data/case01.txt
 create mode 100644 day07/src/day07.jl

diff --git a/day07/Project.toml b/day07/Project.toml
new file mode 100644
index 0000000..1622a1b
--- /dev/null
+++ b/day07/Project.toml
@@ -0,0 +1,4 @@
+name = "day07"
+uuid = "a7124c0b-6031-455e-ae9a-6ffac8aeb54b"
+authors = ["HeNine "]
+version = "0.1.0"
diff --git a/day07/data/case00.txt b/day07/data/case00.txt
new file mode 100644
index 0000000..2bdd92f
--- /dev/null
+++ b/day07/data/case00.txt
@@ -0,0 +1 @@
+16,1,2,0,4,2,7,1,2,14
\ No newline at end of file
diff --git a/day07/data/case01.txt b/day07/data/case01.txt
new file mode 100644
index 0000000..107a746
--- /dev/null
+++ b/day07/data/case01.txt
@@ -0,0 +1 @@
+1101,1,29,67,1102,0,1,65,1008,65,35,66,1005,66,28,1,67,65,20,4,0,1001,65,1,65,1106,0,8,99,35,67,101,99,105,32,110,39,101,115,116,32,112,97,115,32,117,110,101,32,105,110,116,99,111,100,101,32,112,114,111,103,114,97,109,10,807,891,601,565,31,61,126,1220,923,21,750,38,834,1494,1187,235,138,344,438,1078,1664,936,451,86,34,292,782,923,154,1060,286,713,1557,1693,95,7,263,1100,402,472,342,384,95,968,319,193,1130,983,100,88,1020,720,693,790,113,30,30,759,151,1039,111,172,46,478,341,182,229,96,750,88,254,105,599,1074,20,366,307,286,25,467,927,1000,898,139,757,20,13,51,284,323,271,26,93,178,354,1016,165,39,1243,383,89,141,52,260,831,681,189,439,8,4,1849,272,1904,377,422,468,193,81,204,8,1165,919,16,404,442,1571,124,76,534,323,43,16,1039,68,203,177,60,963,100,34,35,433,17,14,432,60,835,789,191,248,256,68,367,326,1271,329,23,992,156,627,365,798,154,457,71,489,3,403,1138,23,1085,128,124,270,65,279,564,145,612,412,700,387,598,7,125,764,1456,1433,1010,874,262,3,39,3,157,280,182,1,1534,49,237,873,585,424,870,93,406,4,343,956,207,271,727,62,376,35,49,74,1532,1318,11,637,398,1508,143,200,339,331,14,447,121,886,512,0,79,246,1292,269,71,83,126,124,120,38,430,238,311,460,549,544,1050,421,421,67,82,25,1730,134,923,161,417,178,1730,81,34,921,1283,648,149,76,390,1311,677,182,184,1109,576,1079,569,136,106,35,1205,170,216,908,523,54,80,87,1278,1080,885,1028,423,310,71,183,395,1269,268,356,628,1173,1026,816,715,751,231,31,86,625,1231,310,86,226,405,111,991,261,145,487,196,183,234,346,987,268,28,299,40,313,597,387,44,648,134,78,302,1189,898,56,957,175,193,170,186,170,7,1789,8,632,503,587,229,72,286,522,145,653,5,29,31,486,145,258,784,513,341,331,223,387,986,374,512,1074,80,119,369,557,57,18,66,1113,251,151,319,138,485,623,577,398,487,281,113,864,273,30,29,1184,194,1531,503,147,402,1587,525,288,1015,921,601,53,346,972,646,151,163,61,585,242,67,258,36,586,347,322,341,251,112,1250,70,35,36,110,392,44,60,401,34,563,374,977,252,184,384,84,912,215,1198,176,630,708,791,1622,343,454,576,218,1054,118,14,10,665,551,20,259,497,289,176,72,524,4,147,1323,596,1512,104,278,332,283,43,804,326,258,247,776,665,435,1683,286,516,677,287,1227,409,411,49,425,207,78,157,487,364,727,976,347,158,292,28,139,1040,217,256,1385,600,95,339,32,64,53,31,394,154,281,1334,161,1291,1474,13,453,1461,25,272,594,832,473,1117,207,1107,595,732,1284,77,504,154,960,191,1416,429,587,654,457,462,457,697,45,366,960,1486,273,747,1366,389,453,1278,852,221,950,537,29,109,1052,112,331,349,790,903,215,135,1457,63,997,8,226,1440,587,1044,215,152,317,336,71,52,1612,438,218,1818,220,186,388,654,93,450,915,1083,145,69,296,712,185,569,849,236,1884,117,761,136,1260,319,1553,751,275,181,137,144,222,322,387,38,951,510,1051,614,1819,436,430,1425,8,271,387,19,205,215,21,585,462,798,27,1512,279,831,1113,97,371,998,677,1488,125,5,208,417,912,1083,276,39,919,91,29,182,1727,650,49,727,1389,1389,23,725,1109,890,594,397,246,47,520,305,282,81,157,283,1031,65,1355,773,480,0,162,655,46,786,677,394,506,1581,1011,149,248,107,212,446,163,553,1005,1,856,32,34,682,128,328,114,7,737,188,31,1157,590,397,159,366,449,601,225,121,320,163,849,746,122,141,443,616,72,660,244,964,718,1628,77,129,854,206,12,458,1130,207,26,622,502,934,979,577,611,1187,62,981,1692,38,11,85,1417,1152,1846,520,1001,104,595,586,945,8,624,1043,955,262,53,453,377,234,1363,239,1553,760,641,615,784,633,1289,853,1224,834,488,521,71,510,45,41,309,50,245,423,7,520,350,137,275,429,86,144,800,172,214,679,87,321,682,1005,278,518,330,705,613,818,1014,469,98,581,72,1647,165,25,510,369,1013,598,209,6,323,530,59,41,1266,787,1191,149,213,8,1490,105,288,88,607,556,50,17,76,513,717,1236,1532,1455,23,77,472,573,303,0,419,573,1217,1,144,648,95,326,999,1359,324,172,259,516,1178,84,1030,73,12,867,1477,70,147,317,999,1377,196,342,127,787,372,687,855,5,1663,49,552,380,95,469,132,58,397,213,194,35,1353,216,12,497,610,571,802,392,42,490,778,6,483,1451
\ No newline at end of file
diff --git a/day07/src/day07.jl b/day07/src/day07.jl
new file mode 100644
index 0000000..9e53843
--- /dev/null
+++ b/day07/src/day07.jl
@@ -0,0 +1,55 @@
+using Statistics
+
+##
+
+function task0(file)
+    readline(file) |>
+    x -> split(x, ",") .|>
+         (x -> parse(Int, x)) |>
+         (x -> convert(Int, sum(abs.(x .- median(x)))))
+end
+
+##
+
+println("Day 07 – Task 1 – Case 0")
+open(task0, "day07\\data\\case00.txt") |> display
+@assert open(task0, "day07\\data\\case00.txt") == 37
+
+println("Day 07 – Task 1 – Case 1")
+open(task0, "day07\\data\\case01.txt") |> println
+@assert open(task0, "day07\\data\\case01.txt") == 336701
+
+##
+
+function objective(x, a)
+    let err = abs.(x .- a)
+        sum((err .* (err .+ 1)) ./ 2)
+    end
+end
+
+function task1(file)
+    a = readline(file) |> x -> split(x, ",") .|> x -> parse(Int, x)
+
+    # Might be massaged into a perfect estimate?
+    x = convert(Int, round(mean(a)))
+
+    while true
+        if objective(x, a) > objective(x + 1, a)
+            x += 1
+        elseif objective(x, a) > objective(x - 1, a)
+            x -= 1
+        else
+            return convert(Int, objective(x, a))
+        end
+    end
+end
+
+##
+
+println("Day 07 – Task 2 – Case 0")
+open(task1, "day07\\data\\case00.txt") |> display
+@assert open(task1, "day07\\data\\case00.txt") == 168
+
+println("Day 07 – Task 2 – Case 1")
+open(task1, "day07\\data\\case01.txt") |> println
+@assert open(task1, "day07\\data\\case01.txt") == 95167302
\ No newline at end of file