Solved Day9

Author: Seralius

Diff for: 09/Part1.js

@@ -2,8 +2,31 @@ const fs = require('fs')
 
 var Rawinput = fs.readFileSync("input.txt").toString('utf-8')
 input = Rawinput.split("\r\n");
+for (let i = 0; i < input.length; i++) {
+    const element = input[i];
+    input[i] = element.split("").map(Number);
+}
 function Run() {
-    
+    var Sum = 0;
+    input.forEach((row,x) => {
+        row.forEach((col,y) => {
+            Sum += IsLowest(x,y)
+        });
+    });
+    console.log(Sum);
+}
+function IsLowest(x,y) {
+    var Input = input[x][y];
+    var Adjacents = [
+        x == 0 ? 99 : input[x-1][y],
+        x == input.length - 1 ? 99 : input[x+1][y],
+        y == 0 ? 99 : input[x][y-1],
+        y == input[x].length -1 ? 99 : input[x][y+1]
+    ]
+    if (Input < Adjacents.sort()[0]) {
+        return 1 + Input;
+    }
+    return 0;
 }
 module.exports = Run;
 //Start timer

Diff for: 09/Part2.js

@@ -2,8 +2,97 @@ const fs = require('fs')
 
 var Rawinput = fs.readFileSync("input.txt").toString('utf-8')
 input = Rawinput.split("\r\n");
+for (let i = 0; i < input.length; i++) {
+    const element = input[i];
+    input[i] = element.split("").map(Number);
+}
 function Run() {
-    
+    var Basins = [];
+    input.forEach((row, x) => {
+        row.forEach((col, y) => {
+            if (IsLowest(x, y) != 0) {
+                Basins.push(GetBasin(x, y));
+            }
+        });
+    });
+    Basins = Basins.sort(function(a, b){return b-a})
+    console.log(Basins[0]* Basins[1] * Basins[2]);
+}
+function IsLowest(x, y) {
+    var Input = input[x][y];
+    var Adjacents = [
+        x == 0 ? 99 : input[x - 1][y],
+        x == input.length - 1 ? 99 : input[x + 1][y],
+        y == 0 ? 99 : input[x][y - 1],
+        y == input[x].length - 1 ? 99 : input[x][y + 1]
+    ]
+    if (Input < Adjacents.sort()[0]) {
+        return 1 + Input;
+    }
+    return 0;
+}
+function GetBasin(x, y) {
+    var Points = [{ x: x, y: y }];
+    var StartingPoint = input[x][y];
+    var OnlyNines = false;
+    while (!OnlyNines) {
+        var OnlyNines = true;
+        Points.forEach(point => {
+            //Check Up
+            if (point.y != 0 && input[point.x][point.y - 1] != 9) {
+                var AlreadyIn = false
+                Points.forEach(point2 => {
+                    if (point2.x == point.x && point2.y == point.y - 1) {
+                        AlreadyIn = true;
+                    }
+                });
+                if (!AlreadyIn) {
+                    OnlyNines = false;
+                    Points.push({ x: point.x, y: point.y - 1 });
+                }
+            }
+            //Check Down
+            if (point.y + 1 != input[0].length && input[point.x][point.y + 1] != 9 && !Points.includes({ x: point.x, y: point.y + 1 })) {
+                var AlreadyIn = false
+                Points.forEach(point2 => {
+                    if (point2.x == point.x && point2.y == point.y + 1) {
+                        AlreadyIn = true;
+                    }
+                });
+                if (!AlreadyIn) {
+                    OnlyNines = false;
+                    Points.push({ x: point.x, y: point.y + 1 });
+                }
+            }
+            //Check Left
+            if (point.x != 0 && input[point.x - 1][point.y] != 9 && !Points.includes({ x: point.x + 1, y: point.y })) {
+                var AlreadyIn = false
+                Points.forEach(point2 => {
+                    if (point2.x == point.x - 1 && point2.y == point.y) {
+                        AlreadyIn = true;
+                    }
+                });
+                if (!AlreadyIn) {
+                    OnlyNines = false;
+                    Points.push({ x: point.x - 1, y: point.y});
+                }
+            }
+            //Check Right
+            if (point.x + 1 != input.length && input[point.x + 1][point.y] != 9 && !Points.includes({ x: point.x + 1, y: point.y })) {
+                var AlreadyIn = false
+                Points.forEach(point2 => {
+                    if (point2.x == point.x + 1&& point2.y == point.y) {
+                        AlreadyIn = true;
+                    }
+                });
+                if (!AlreadyIn) {
+                    OnlyNines = false;
+                    Points.push({ x: point.x + 1, y: point.y});
+                }
+            }
+        })
+    }
+    return Points.length;
 }
 module.exports = Run;
 //Start timer