From 15d01b69c4e6fae95a95bc210256afd9fd4b0509 Mon Sep 17 00:00:00 2001 From: Matthias Rahlf Date: Mon, 26 Feb 2024 18:37:19 +0100 Subject: [PATCH 1/3] add exercise two-bucket --- config.json | 8 ++++ .../practice/two-bucket/.docs/instructions.md | 46 +++++++++++++++++++ .../practice/two-bucket/.meta/config.json | 19 ++++++++ .../practice/two-bucket/.meta/example.nim | 32 +++++++++++++ .../practice/two-bucket/.meta/tests.toml | 37 +++++++++++++++ .../practice/two-bucket/test_two_bucket.nim | 31 +++++++++++++ exercises/practice/two-bucket/two_bucket.nim | 9 ++++ 7 files changed, 182 insertions(+) create mode 100644 exercises/practice/two-bucket/.docs/instructions.md create mode 100644 exercises/practice/two-bucket/.meta/config.json create mode 100644 exercises/practice/two-bucket/.meta/example.nim create mode 100644 exercises/practice/two-bucket/.meta/tests.toml create mode 100644 exercises/practice/two-bucket/test_two_bucket.nim create mode 100644 exercises/practice/two-bucket/two_bucket.nim diff --git a/config.json b/config.json index 32448b50..8fa3c1f2 100644 --- a/config.json +++ b/config.json @@ -979,6 +979,14 @@ "events", "reactive_programming" ] + }, + { + "slug": "two-bucket", + "name": "Two Bucket", + "uuid": "7bd03415-9b80-455c-a41c-3de292595fcd", + "practices": [], + "prerequisites": [], + "difficulty": 3 } ] }, diff --git a/exercises/practice/two-bucket/.docs/instructions.md b/exercises/practice/two-bucket/.docs/instructions.md new file mode 100644 index 00000000..7249deb3 --- /dev/null +++ b/exercises/practice/two-bucket/.docs/instructions.md @@ -0,0 +1,46 @@ +# Instructions + +Given two buckets of different size and which bucket to fill first, determine how many actions are required to measure an exact number of liters by strategically transferring fluid between the buckets. + +There are some rules that your solution must follow: + +- You can only do one action at a time. +- There are only 3 possible actions: + 1. Pouring one bucket into the other bucket until either: + a) the first bucket is empty + b) the second bucket is full + 2. Emptying a bucket and doing nothing to the other. + 3. Filling a bucket and doing nothing to the other. +- After an action, you may not arrive at a state where the starting bucket is empty and the other bucket is full. + +Your program will take as input: + +- the size of bucket one +- the size of bucket two +- the desired number of liters to reach +- which bucket to fill first, either bucket one or bucket two + +Your program should determine: + +- the total number of actions it should take to reach the desired number of liters, including the first fill of the starting bucket +- which bucket should end up with the desired number of liters - either bucket one or bucket two +- how many liters are left in the other bucket + +Note: any time a change is made to either or both buckets counts as one (1) action. + +Example: +Bucket one can hold up to 7 liters, and bucket two can hold up to 11 liters. +Let's say at a given step, bucket one is holding 7 liters and bucket two is holding 8 liters (7,8). +If you empty bucket one and make no change to bucket two, leaving you with 0 liters and 8 liters respectively (0,8), that counts as one action. +Instead, if you had poured from bucket one into bucket two until bucket two was full, resulting in 4 liters in bucket one and 11 liters in bucket two (4,11), that would also only count as one action. + +Another Example: +Bucket one can hold 3 liters, and bucket two can hold up to 5 liters. +You are told you must start with bucket one. +So your first action is to fill bucket one. +You choose to empty bucket one for your second action. +For your third action, you may not fill bucket two, because this violates the third rule -- you may not end up in a state after any action where the starting bucket is empty and the other bucket is full. + +Written with <3 at [Fullstack Academy][fullstack] by Lindsay Levine. + +[fullstack]: https://www.fullstackacademy.com/ diff --git a/exercises/practice/two-bucket/.meta/config.json b/exercises/practice/two-bucket/.meta/config.json new file mode 100644 index 00000000..76e5f593 --- /dev/null +++ b/exercises/practice/two-bucket/.meta/config.json @@ -0,0 +1,19 @@ +{ + "authors": [ + "siebenschlaefer" + ], + "files": { + "solution": [ + "two_bucket.nim" + ], + "test": [ + "test_two_bucket.nim" + ], + "example": [ + ".meta/example.nim" + ] + }, + "blurb": "Given two buckets of different size, demonstrate how to measure an exact number of liters.", + "source": "Water Pouring Problem", + "source_url": "https://demonstrations.wolfram.com/WaterPouringProblem/" +} diff --git a/exercises/practice/two-bucket/.meta/example.nim b/exercises/practice/two-bucket/.meta/example.nim new file mode 100644 index 00000000..c81bd52b --- /dev/null +++ b/exercises/practice/two-bucket/.meta/example.nim @@ -0,0 +1,32 @@ +type + measureResult* = tuple + possible: bool + moves: int + goalBucket: string + otherBucket: int + +proc measure*(bucket1, bucket2, goal: int, startBucket: string): measureResult = + if startBucket == "two": + result = measure(bucket2, bucket1, goal, "one") + result.goalBucket = if result.goalBucket == "one": "two" else: "one" + return result + + if goal == 0: return (true, 0, "one", 0) + if goal == bucket1: return (true, 1, "one", 0) + if goal == bucket2: return (true, 2, "two", bucket1) + + var moves, vol1, vol2 = 0 + while vol1 != 0 or vol2 != bucket2: + moves.inc 2 + + if vol1 == 0: + vol1 = bucket1 + else: + vol2 = 0 + + if vol1 + vol2 > bucket2: + (vol1, vol2) = (vol1 + vol2 - bucket2, bucket2) + if vol1 == goal: return (true, moves, "one", vol2) + else: + (vol1, vol2) = (0, vol1 + vol2) + if vol2 == goal: return (true, moves, "two", vol1) diff --git a/exercises/practice/two-bucket/.meta/tests.toml b/exercises/practice/two-bucket/.meta/tests.toml new file mode 100644 index 00000000..d6ff02f5 --- /dev/null +++ b/exercises/practice/two-bucket/.meta/tests.toml @@ -0,0 +1,37 @@ +# This is an auto-generated file. +# +# Regenerating this file via `configlet sync` will: +# - Recreate every `description` key/value pair +# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications +# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion) +# - Preserve any other key/value pair +# +# As user-added comments (using the # character) will be removed when this file +# is regenerated, comments can be added via a `comment` key. + +[a6f2b4ba-065f-4dca-b6f0-e3eee51cb661] +description = "Measure using bucket one of size 3 and bucket two of size 5 - start with bucket one" + +[6c4ea451-9678-4926-b9b3-68364e066d40] +description = "Measure using bucket one of size 3 and bucket two of size 5 - start with bucket two" + +[3389f45e-6a56-46d5-9607-75aa930502ff] +description = "Measure using bucket one of size 7 and bucket two of size 11 - start with bucket one" + +[fe0ff9a0-3ea5-4bf7-b17d-6d4243961aa1] +description = "Measure using bucket one of size 7 and bucket two of size 11 - start with bucket two" + +[0ee1f57e-da84-44f7-ac91-38b878691602] +description = "Measure one step using bucket one of size 1 and bucket two of size 3 - start with bucket two" + +[eb329c63-5540-4735-b30b-97f7f4df0f84] +description = "Measure using bucket one of size 2 and bucket two of size 3 - start with bucket one and end with bucket two" + +[449be72d-b10a-4f4b-a959-ca741e333b72] +description = "Not possible to reach the goal" + +[aac38b7a-77f4-4d62-9b91-8846d533b054] +description = "With the same buckets but a different goal, then it is possible" + +[74633132-0ccf-49de-8450-af4ab2e3b299] +description = "Goal larger than both buckets is impossible" diff --git a/exercises/practice/two-bucket/test_two_bucket.nim b/exercises/practice/two-bucket/test_two_bucket.nim new file mode 100644 index 00000000..e83c41b0 --- /dev/null +++ b/exercises/practice/two-bucket/test_two_bucket.nim @@ -0,0 +1,31 @@ +import unittest +import two_bucket + +suite "two-bucket": + test "Measure using bucket one of size 3 and bucket two of size 5 - start with bucket one": + check measure(3, 5, 1, "one") == (possible: true, moves: 4, goalBucket: "one", otherBucket: 5) + + test "Measure using bucket one of size 3 and bucket two of size 5 - start with bucket two": + check measure(3, 5, 1, "two") == (possible: true, moves: 8, goalBucket: "two", otherBucket: 3) + + test "Measure using bucket one of size 7 and bucket two of size 11 - start with bucket one": + check measure(7, 11, 2, "one") == (possible: true, moves: 14, goalBucket: "one", otherBucket: 11) + + test "Measure using bucket one of size 7 and bucket two of size 11 - start with bucket two": + check measure(7, 11, 2, "two") == (possible: true, moves: 18, goalBucket: "two", otherBucket: 7) + + test "Measure one step using bucket one of size 1 and bucket two of size 3 - start with bucket two": + check measure(1, 3, 3, "two") == (possible: true, moves: 1, goalBucket: "two", otherBucket: 0) + + test "Measure using bucket one of size 2 and bucket two of size 3 - start with bucket one and end with bucket two": + check measure(2, 3, 3, "one") == (possible: true, moves: 2, goalBucket: "two", otherBucket: 2) + + test "Not possible to reach the goal": + check not measure(6, 15, 5, "one").possible + + test "With the same buckets but a different goal, then it is possible": + check measure(6, 15, 9, "one") == (possible: true, moves: 10, goalBucket: "two", otherBucket: 0) + + test "Goal larger than both buckets is impossible": + check not measure(5, 7, 8, "one").possible + diff --git a/exercises/practice/two-bucket/two_bucket.nim b/exercises/practice/two-bucket/two_bucket.nim new file mode 100644 index 00000000..ff958cec --- /dev/null +++ b/exercises/practice/two-bucket/two_bucket.nim @@ -0,0 +1,9 @@ +type + measureResult* = tuple + possible: bool + moves: int + goalBucket: string + otherBucket: int + +proc measure*(bucket1, bucket2, goal: int, startBucket: string): measureResult = + discard From f3693deda50d8ee13cfb726d1464f1eacac14c33 Mon Sep 17 00:00:00 2001 From: Matthias Rahlf Date: Mon, 26 Feb 2024 19:56:54 +0100 Subject: [PATCH 2/3] two-bucket: Remove empty line at end of file --- exercises/practice/two-bucket/test_two_bucket.nim | 1 - 1 file changed, 1 deletion(-) diff --git a/exercises/practice/two-bucket/test_two_bucket.nim b/exercises/practice/two-bucket/test_two_bucket.nim index e83c41b0..0ffddb41 100644 --- a/exercises/practice/two-bucket/test_two_bucket.nim +++ b/exercises/practice/two-bucket/test_two_bucket.nim @@ -28,4 +28,3 @@ suite "two-bucket": test "Goal larger than both buckets is impossible": check not measure(5, 7, 8, "one").possible - From 859f7d30da7ae25eccf8914b0a0cc7bdf9b8b6a3 Mon Sep 17 00:00:00 2001 From: Matthias Rahlf Date: Tue, 27 Feb 2024 08:31:06 +0100 Subject: [PATCH 3/3] two-bucket: PascalCase for types --- exercises/practice/two-bucket/.meta/example.nim | 4 ++-- exercises/practice/two-bucket/two_bucket.nim | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/exercises/practice/two-bucket/.meta/example.nim b/exercises/practice/two-bucket/.meta/example.nim index c81bd52b..81773175 100644 --- a/exercises/practice/two-bucket/.meta/example.nim +++ b/exercises/practice/two-bucket/.meta/example.nim @@ -1,11 +1,11 @@ type - measureResult* = tuple + MeasureResult* = tuple possible: bool moves: int goalBucket: string otherBucket: int -proc measure*(bucket1, bucket2, goal: int, startBucket: string): measureResult = +proc measure*(bucket1, bucket2, goal: int, startBucket: string): MeasureResult = if startBucket == "two": result = measure(bucket2, bucket1, goal, "one") result.goalBucket = if result.goalBucket == "one": "two" else: "one" diff --git a/exercises/practice/two-bucket/two_bucket.nim b/exercises/practice/two-bucket/two_bucket.nim index ff958cec..26bb7186 100644 --- a/exercises/practice/two-bucket/two_bucket.nim +++ b/exercises/practice/two-bucket/two_bucket.nim @@ -1,9 +1,9 @@ type - measureResult* = tuple + MeasureResult* = tuple possible: bool moves: int goalBucket: string otherBucket: int -proc measure*(bucket1, bucket2, goal: int, startBucket: string): measureResult = +proc measure*(bucket1, bucket2, goal: int, startBucket: string): MeasureResult = discard