tmp

d17/TODO

@@ -0,0 +1 @@
+expected 27042 then 22214

d17/input

@@ -0,0 +1,1854 @@
+y=931, x=455..475
+x=566, y=770..774
+x=561, y=684..694
+y=1576, x=490..493
+x=409, y=998..1013
+y=817, x=514..518
+x=460, y=1195..1197
+x=397, y=1843..1853
+y=1487, x=561..563
+x=504, y=1743..1757
+y=351, x=527..535
+x=484, y=1662..1674
+x=502, y=276..286
+x=439, y=1439..1461
+y=412, x=402..419
+x=428, y=221..223
+x=423, y=1296..1307
+y=1977, x=571..576
+x=359, y=970..996
+y=895, x=472..500
+x=349, y=350..374
+y=1772, x=405..407
+y=177, x=386..392
+y=690, x=551..553
+y=1540, x=381..433
+x=411, y=1747..1757
+x=442, y=802..822
+x=453, y=1210..1223
+x=427, y=1182..1188
+x=484, y=350..376
+x=502, y=2010..2018
+y=1161, x=434..440
+y=972, x=468..486
+x=443, y=1633..1647
+x=440, y=2006..2020
+x=573, y=1610..1627
+x=453, y=1189..1200
+y=126, x=396..410
+x=467, y=1280..1302
+x=519, y=150..162
+x=573, y=1987..2010
+y=1779, x=449..465
+x=513, y=360..371
+x=483, y=682..684
+x=509, y=968..986
+y=1931, x=423..447
+y=1106, x=357..377
+x=468, y=959..972
+y=552, x=440..464
+x=477, y=780..784
+x=578, y=1779..1782
+x=398, y=1356..1369
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+x=543, y=1102..1127
+x=486, y=833..837
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+x=459, y=432..446
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+x=377, y=1977..1987
+x=427, y=751..765
+x=456, y=816..818
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d17/main.js

@@ -0,0 +1,135 @@
+
+function readAll(cb) {
+    require("fs").readFile('./input', 'utf8', (err, data) => {
+        var world = new World();
+        data.split("\n").forEach(line => {
+            if (!line)
+                return;
+            var numbers = line.match(/(\d+)/g).map(i => parseInt(i));
+            if (line.charAt(0) == 'x')
+                world.addData(numbers[0], numbers[0], numbers[1], numbers[2], 'x');
+            else
+                world.addData(numbers[1], numbers[2], numbers[0], numbers[0], 'x');
+        });
+        cb(world);
+    });
+}
+
+function World() {
+    this.data = {};
+    this.sources = [[ 500, 0 ]];
+    this.minX = 500;
+    this.maxX = 500;
+    this.minY = 0;
+    this.maxY = 0;
+}
+
+World.prototype.addData = function(x1, x2, y1, y2, type) {
+    while (y1 <= y2) {
+        for (var j = x1; j <= x2; ++j) {
+            this.data[y1] = this.data[y1] || {};
+            this.data[y1][j] = type;
+        }
+        ++y1;
+    }
+    this.minX = Math.min(x1, this.minX);
+    this.maxX = Math.max(x2, this.maxX);
+    if (type == 'x') {
+        this.minY = Math.min(y1, this.minY);
+        this.maxY = Math.max(y2, this.maxY);
+    }
+}
+
+World.prototype.getChar = function(x, y, defaultValue) {
+    return this.data[y] ? this.data[y][x] || defaultValue : defaultValue;
+}
+
+World.prototype.isEmpty = function(x, y) {
+    var c = this.getChar(x, y, false);
+    return !c || c == '|';
+}
+
+World.prototype.nextClay = function(x, y, direction) {
+    for (; x >= this.minX && x <= this.maxX; x += direction) {
+        if (this.isEmpty(x, y +1))
+            return false;
+        if (!this.isEmpty(x, y))
+            return x;
+    }
+    return false;
+}
+
+World.prototype.trySettle = function(minX, maxX, y) {
+    if (minX === false || maxX === false || minX === maxX)
+        return false;
+    this.addData(minX +1, maxX -1, y, y, '~');
+    return true;
+}
+
+World.prototype.water = function() {
+    var x = this.sources[0][0],
+        y = this.sources[0][1];
+    while (this.isEmpty(x, y +1) && y <= this.maxY)
+        ++y;
+    if (y <= this.maxY) {
+        var minX = this.nextClay(x, y, -1),
+            maxX = this.nextClay(x, y, +1);
+        if (this.trySettle(minX, maxX, y))
+            return;
+        var found = false;
+        for (var tmp = x; this.isEmpty(tmp, y); ++tmp) {
+            this.addData(tmp, tmp, y, y, '|');
+            if (this.isEmpty(tmp, y +1)) {
+                this.sources.push([ tmp, y ]);
+                break;
+            }
+        }
+        for (var tmp = x; this.isEmpty(tmp, y); --tmp) {
+            this.addData(tmp, x, y, y, '|');
+            if (this.isEmpty(tmp, y +1)) {
+                this.addData(tmp, x, y, y, '|');
+                this.sources.push([ tmp, y ]);
+                break;
+            }
+        }
+    }
+    this.addData(x, x, this.sources[0][1], y, '|');
+    this.sources.splice(0, 1);
+}
+
+World.prototype.countWater = function() {
+    var count = { settled: 0, unsettled: 0 };
+    for (var i in this.data)
+        if (i != 0)
+            for (var j in this.data[i])
+                switch (this.data[i][j]) {
+                    case '~':
+                        ++count.settled;
+                        break;
+                    case '|':
+                        ++count.unsettled;
+                        break;
+                }
+    count.total = count.settled +count.unsettled;
+    return count;
+}
+
+World.prototype.print = function() {
+    for (var i =this.minY; i <= this.maxY; ++i) {
+        for (var j =this.minX; j <= this.maxX; ++j)
+            process.stdout.write(this.getChar(j, i, ' '));
+        process.stdout.write("\n");
+    }
+}
+
+function run() {
+    readAll(world => {
+        while (world.sources.length)
+            world.water();
+        //world.print();
+        console.log("Water cell: ", world.countWater());
+    });
+}
+
+run();
+

d17/smallinput

@@ -0,0 +1,9 @@
+x=495, y=2..7
+y=7, x=495..501
+x=501, y=3..7
+x=498, y=2..4
+x=506, y=1..2
+x=498, y=10..13
+x=504, y=10..13
+y=13, x=498..504
+x=500, y=1..2