fix(2018 day-12): off by one, need generation 5,000,000,000, not generation 4,999,999,999

developher-net · developher-net · commit 1c46a1f7503b · 2018-12-22T14:22:38.000-08:00
diff --git a/2018/day-12/solution.js b/2018/day-12/solution.js
@@ -58,7 +58,7 @@ const init = (data) => {
   }
   console.log(`At generation ${stableGeneration} the Δ is ${stableDeltas[0]} and the checksum is ${stableCheckSum}.`)
   // Calculate the checksum for 50B generations (minus the generation we're already at)
-  const answer2 = (stableDeltas[0] * (50000000000 - stableGeneration - 1)) + stableCheckSum
+  const answer2 = (stableDeltas[0] * (50000000000 - stableGeneration)) + stableCheckSum
 
   console.log(`-- Part 1 --`)
   console.log(`Answer: ${answer}`)

Original file line number	Diff line number	Diff line change
`@@ -58,7 +58,7 @@ const init = (data) => {`
`58`	`58`	`}`
`59`	`59`	console.log(`At generation ${stableGeneration} the Δ is ${stableDeltas[0]} and the checksum is ${stableCheckSum}.`)
`60`	`60`	`// Calculate the checksum for 50B generations (minus the generation we're already at)`
`61`		`- const answer2 = (stableDeltas[0] * (50000000000 - stableGeneration - 1)) + stableCheckSum`
	`61`	`+ const answer2 = (stableDeltas[0] * (50000000000 - stableGeneration)) + stableCheckSum`
`62`	`62`
`63`	`63`	console.log(`-- Part 1 --`)
`64`	`64`	console.log(`Answer: ${answer}`)