day22

1 files changed, 21 insertions, 0 deletions

diff --git a/day22/day22-1.js b/day22/day22-1.js
new file mode 100644
index 0000000..f2528f5
--- /dev/null
+++ b/day22/day22-1.js
@@ -0,0 +1,21 @@
+const data = require('./data')
+const [player1, player2] = data.split('\n\n').filter(Boolean)
+  .map(p => p.split(/\n/g).filter(Boolean).slice(1))
+
+const round = () => {
+  const c1 = player1.shift()
+  const c2 = player2.shift()
+  if (parseInt(c1) > parseInt(c2)) {
+    player1.push(c1, c2)
+  } else {
+    player2.push(c2, c1)
+  }
+}
+
+while (player1.length>0 && player2.length>0) { round() }
+
+const cards = player1.length > 0 ? player1 : player2
+const score = cards.reverse().map((c, i) => parseInt(c) * (i+1)).reduce((a,b) => a + b, 0)
+
+console.log('Answer: ', score)
+