Initial data commit

Task/Convex-hull/JavaScript/convex-hull-1.js

@@ -0,0 +1,28 @@
+function convexHull(points) {
+    points.sort(comparison);
+    var L = [];
+    for (var i = 0; i < points.length; i++) {
+        while (L.length >= 2 && cross(L[L.length - 2], L[L.length - 1], points[i]) <= 0) {
+            L.pop();
+        }
+        L.push(points[i]);
+    }
+    var U = [];
+    for (var i = points.length - 1; i >= 0; i--) {
+        while (U.length >= 2 && cross(U[U.length - 2], U[U.length - 1], points[i]) <= 0) {
+            U.pop();
+        }
+        U.push(points[i]);
+    }
+    L.pop();
+    U.pop();
+    return L.concat(U);
+}
+
+function comparison(a, b) {
+    return a.x == b.x ? a.y - b.y : a.x - b.x;
+}
+
+function cross(a, b, o) {
+    return (a.x - o.x) * (b.y - o.y) - (a.y - o.y) * (b.x - o.x);
+}