Solutions for day one

.nvmrc

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+14.17.6

01/code.js

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+
+const fs = require('fs');
+
+const inputArray = fs.readFileSync('input.txt').toString().split("\n");
+
+// Part One
+let increases = 0;
+let previous;
+
+for(i in inputArray) {
+  const value = parseInt(inputArray[i]);
+  if (previous && value > previous) {
+    increases++;
+  }
+  previous = value;
+}
+
+console.log(increases);
+
+
+// Part Two
+increases = 0;
+previous = null;
+let a;
+let b;
+let c;
+
+for(i in inputArray) {
+  c = parseInt(inputArray[i]);
+  total = a + b + c;
+  if (a && b && c && total > previous) {
+    increases++;
+  }
+
+  a = b;
+  b = c;
+  previous = total;
+}
+
+console.log(increases);