diff --git a/.gitignore b/.gitignore
index c2658d7..5387f1f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 node_modules/
+spec/*.js
+day*.js
\ No newline at end of file
diff --git a/day1.js b/day1.js
deleted file mode 100644
index 4cbbe73..0000000
--- a/day1.js
+++ /dev/null
@@ -1,51 +0,0 @@
-"use strict";
-var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
-    if (k2 === undefined) k2 = k;
-    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
-}) : (function(o, m, k, k2) {
-    if (k2 === undefined) k2 = k;
-    o[k2] = m[k];
-}));
-var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
-    Object.defineProperty(o, "default", { enumerable: true, value: v });
-}) : function(o, v) {
-    o["default"] = v;
-});
-var __importStar = (this && this.__importStar) || function (mod) {
-    if (mod && mod.__esModule) return mod;
-    var result = {};
-    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
-    __setModuleDefault(result, mod);
-    return result;
-};
-Object.defineProperty(exports, "__esModule", { value: true });
-exports.driver = exports.ex2core = exports.ex1core = void 0;
-var fs = __importStar(require("fs"));
-function ex1core(input) {
-    for (var i = 0; i < input.length - 1; i++)
-        for (var j = i + 1; j < input.length; j++)
-            if (input[i] + input[j] === 2020) {
-                return input[i] * input[j];
-            }
-    return 514579;
-}
-exports.ex1core = ex1core;
-//  i  j  k
-// [1, 2, 3]
-function ex2core(input) {
-    for (var i = 0; i < input.length - 2; i++)
-        for (var j = i + 1; j < input.length - 1; j++)
-            for (var k = j + 1; k < input.length; k++)
-                if (input[i] + input[j] + input[k] === 2020) {
-                    return input[i] * input[j] * input[k];
-                }
-    return 514579;
-}
-exports.ex2core = ex2core;
-function driver(exercise, readFile, output) {
-    var content = readFile();
-    var input = content.split("\n").map(function (x) { return +x.trim(); });
-    output("" + exercise(input));
-}
-exports.driver = driver;
-driver(ex2core, function () { return "" + fs.readFileSync("ex1.txt"); }, function (s) { return console.log(s); });
diff --git a/day2.js b/day2.js
deleted file mode 100644
index 7cf5c4b..0000000
--- a/day2.js
+++ /dev/null
@@ -1,70 +0,0 @@
-"use strict";
-var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
-    if (k2 === undefined) k2 = k;
-    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
-}) : (function(o, m, k, k2) {
-    if (k2 === undefined) k2 = k;
-    o[k2] = m[k];
-}));
-var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
-    Object.defineProperty(o, "default", { enumerable: true, value: v });
-}) : function(o, v) {
-    o["default"] = v;
-});
-var __importStar = (this && this.__importStar) || function (mod) {
-    if (mod && mod.__esModule) return mod;
-    var result = {};
-    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
-    __setModuleDefault(result, mod);
-    return result;
-};
-Object.defineProperty(exports, "__esModule", { value: true });
-exports.driver = exports.ex2 = exports.ex1 = void 0;
-var fs = __importStar(require("fs"));
-function isValidExercise1(conf) {
-    var count = 0;
-    for (var i = 0; i < conf.password.length; i++) {
-        if (conf.password.charAt(i) === conf.policy.char) {
-            count++;
-        }
-    }
-    return conf.policy.min <= count && count <= conf.policy.max;
-}
-function xor(a, b) {
-    return (a && !b) || (!a && b);
-}
-function isValidExercise2(conf) {
-    return xor(conf.password.charAt(conf.policy.min - 1) === conf.policy.char, conf.password.charAt(conf.policy.max - 1) === conf.policy.char);
-}
-function core(validator, input) {
-    var valid = 0;
-    for (var i = 0; i < input.length; i++)
-        if (validator(input[i])) {
-            valid++;
-        }
-    return valid;
-}
-function ex1(input) {
-    return core(isValidExercise1, input);
-}
-exports.ex1 = ex1;
-function ex2(input) {
-    return core(isValidExercise2, input);
-}
-exports.ex2 = ex2;
-function parse(line) {
-    var parts = line.split(": ");
-    var policyParts = parts[0].split(" ");
-    var rangeParts = policyParts[0].split("-");
-    return {
-        policy: { min: +rangeParts[0], max: +rangeParts[1], char: policyParts[1] },
-        password: parts[1],
-    };
-}
-function driver(validator, readFile, output) {
-    var content = readFile();
-    var input = content.split("\n").map(parse);
-    output("" + core(validator, input));
-}
-exports.driver = driver;
-driver(isValidExercise2, function () { return "" + fs.readFileSync("ex2.txt"); }, function (s) { return console.log(s); });
diff --git a/day3.js b/day3.js
deleted file mode 100644
index 9b421a8..0000000
--- a/day3.js
+++ /dev/null
@@ -1,53 +0,0 @@
-"use strict";
-var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
-    if (k2 === undefined) k2 = k;
-    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
-}) : (function(o, m, k, k2) {
-    if (k2 === undefined) k2 = k;
-    o[k2] = m[k];
-}));
-var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
-    Object.defineProperty(o, "default", { enumerable: true, value: v });
-}) : function(o, v) {
-    o["default"] = v;
-});
-var __importStar = (this && this.__importStar) || function (mod) {
-    if (mod && mod.__esModule) return mod;
-    var result = {};
-    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
-    __setModuleDefault(result, mod);
-    return result;
-};
-Object.defineProperty(exports, "__esModule", { value: true });
-exports.ex2 = exports.ex1 = void 0;
-var fs = __importStar(require("fs"));
-function core(sx, sy, map) {
-    var x = 0;
-    var y = 0;
-    var count = 0;
-    while (y < map.length) {
-        if (map[y][x] === "#")
-            count++;
-        x += sx;
-        while (x >= map[y].length)
-            x -= map[y].length;
-        y += sy;
-    }
-    return count;
-}
-function ex1(map) {
-    return core(3, 1, map);
-}
-exports.ex1 = ex1;
-function ex2(map) {
-    return (core(1, 1, map) *
-        core(3, 1, map) *
-        core(5, 1, map) *
-        core(7, 1, map) *
-        core(1, 2, map));
-}
-exports.ex2 = ex2;
-var map = ("" + fs.readFileSync("ex3.txt"))
-    .split("\n")
-    .map(function (x) { return x.trim().split(""); });
-console.log(ex2(map));
diff --git a/spec/day1spec.js b/spec/day1spec.js
deleted file mode 100644
index 35a507c..0000000
--- a/spec/day1spec.js
+++ /dev/null
@@ -1,45 +0,0 @@
-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });
-var day1_1 = require("../day1");
-describe("Exercise 1 core", function () {
-    it("works for given example", function () {
-        var input = [1721, 979, 366, 299, 675, 1456];
-        var result = day1_1.ex1core(input);
-        expect(result).toBe(514579);
-    });
-    it("works for minimal example", function () {
-        var input = [2019, 1];
-        var result = day1_1.ex1core(input);
-        expect(result).toBe(2019);
-    });
-});
-describe("Exercise 1", function () {
-    it("works for given example", function () {
-        var input = function () { return "1721\n979\n366\n299\n675\n1456"; };
-        var out = "";
-        var output = function (s) { return (out += s); };
-        day1_1.driver(day1_1.ex1core, input, output);
-        expect(out).toBe("514579");
-    });
-});
-describe("Exercise 2", function () {
-    it("works for given example", function () {
-        var input = function () { return "1721\n979\n366\n299\n675\n1456"; };
-        var out = "";
-        var output = function (s) { return (out += s); };
-        day1_1.driver(day1_1.ex2core, input, output);
-        expect(out).toBe("241861950");
-    });
-});
-describe("Exercise 2 core", function () {
-    it("works for given example", function () {
-        var input = [1721, 979, 366, 299, 675, 1456];
-        var result = day1_1.ex2core(input);
-        expect(result).toBe(241861950);
-    });
-    it("works for minimal example", function () {
-        var input = [2018, 1, 1];
-        var result = day1_1.ex2core(input);
-        expect(result).toBe(2018);
-    });
-});
diff --git a/spec/day2spec.js b/spec/day2spec.js
deleted file mode 100644
index f87c5dc..0000000
--- a/spec/day2spec.js
+++ /dev/null
@@ -1,31 +0,0 @@
-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });
-var day2_1 = require("../day2");
-describe("Exercise 1 core", function () {
-    it("works on given example", function () {
-        var input = [
-            { policy: { min: 1, max: 3, char: "a" }, password: "abcde" },
-            { policy: { min: 1, max: 3, char: "b" }, password: "cdefg" },
-            { policy: { min: 2, max: 9, char: "c" }, password: "ccccccccc" },
-        ];
-        expect(day2_1.ex1(input)).toBe(2);
-    });
-    it("works on another example", function () {
-        var input = [{ policy: { min: 3, max: 3, char: "h" }, password: "hhh" }];
-        expect(day2_1.ex1(input)).toBe(1);
-    });
-});
-describe("Exercise 1 core", function () {
-    it("works on given example", function () {
-        var input = [
-            { policy: { min: 1, max: 3, char: "a" }, password: "abcde" },
-            { policy: { min: 1, max: 3, char: "b" }, password: "cdefg" },
-            { policy: { min: 2, max: 9, char: "c" }, password: "ccccccccc" },
-        ];
-        expect(day2_1.ex2(input)).toBe(1);
-    });
-    it("works on another example", function () {
-        var input = [{ policy: { min: 3, max: 3, char: "h" }, password: "hhh" }];
-        expect(day2_1.ex2(input)).toBe(0);
-    });
-});
diff --git a/spec/day3spec.js b/spec/day3spec.js
deleted file mode 100644
index 7eaa24a..0000000
--- a/spec/day3spec.js
+++ /dev/null
@@ -1,19 +0,0 @@
-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });
-var day3_1 = require("../day3");
-describe("Exercise 1", function () {
-    it("works with given example", function () {
-        var map = "..##.......\n#...#...#..\n.#....#..#.\n..#.#...#.#\n.#...##..#.\n..#.##.....\n.#.#.#....#\n.#........#\n#.##...#...\n#...##....#\n.#..#...#.#"
-            .split("\n")
-            .map(function (x) { return x.trim().split(""); });
-        expect(day3_1.ex1(map)).toBe(7);
-    });
-});
-describe("Exercise 2", function () {
-    it("works with given example", function () {
-        var map = "..##.......\n#...#...#..\n.#....#..#.\n..#.#...#.#\n.#...##..#.\n..#.##.....\n.#.#.#....#\n.#........#\n#.##...#...\n#...##....#\n.#..#...#.#"
-            .split("\n")
-            .map(function (x) { return x.trim().split(""); });
-        expect(day3_1.ex2(map)).toBe(336);
-    });
-});