d4

d4/input

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+

d4/main.js

@@ -0,0 +1,41 @@
+const fs = require('fs');
+const readline = require('readline');
+
+function ElfeSections(input) {
+    let inputP = input.split('-').map(i => parseInt(i));
+    this.min = inputP[0];
+    this.max = inputP[1];
+}
+
+ElfeSections.prototype._partialContains = function(section) {
+    return (this.min <= section.max && section.min <= this.max);
+}
+
+ElfeSections.prototype.partialContains = function(section) {
+    return this._partialContains(section) || section._partialContains(this);
+}
+
+ElfeSections.prototype.fullyContains = function(section) {
+    return ((section.min >= this.min && section.max <= this.max) ||
+        (this.min >= section.min && this.max <= section.max));
+}
+
+async function main() {
+    let fullyContains = 0;
+    let partialContains = 0;
+
+    for await (let line of readline.createInterface({ input: process.stdin })) {
+        if (!line || !line.length)
+            continue;
+        let lineGroup = line.split(',').map(i => new ElfeSections(i));
+        if (lineGroup[0].fullyContains(lineGroup[1]))
+            fullyContains++;
+        if (lineGroup[0].partialContains(lineGroup[1]))
+            partialContains++;
+    }
+    console.log("Fully contains: "+ fullyContains);
+    console.log("Partial contains: "+ partialContains);
+};
+
+(main());
+