Rust Day 6 - Another solution

rust/src/day06/main.rs

@@ -12,6 +12,12 @@ mod part_2;
 mod solutions;
 
 pub fn main() {
-    println!("Part 1: {}", solve_vertesians_nodeps_const::<4>(INPUT));
-    println!("Part 2: {}", solve_vertesians_nodeps_const::<14>(INPUT));
+    println!(
+        "Part 1: {}",
+        solve_nicopap_vertesians_nodeps_const::<4>(INPUT)
+    );
+    println!(
+        "Part 2: {}",
+        solve_nicopap_vertesians_nodeps_const::<14>(INPUT)
+    );
 }

rust/src/day06/part_1.rs

@@ -287,23 +287,46 @@ mod tests {
     }
 
     #[bench]
-    fn bench_vertesians_nodeps_const(bencher: &mut test::Bencher) {
-        bencher.iter(|| solve_vertesians_nodeps_const::<WINDOW_SIZE>(crate::INPUT));
+    fn bench_nicopap_vertesians_nodeps_const(bencher: &mut test::Bencher) {
+        bencher.iter(|| solve_nicopap_vertesians_nodeps_const::<WINDOW_SIZE>(crate::INPUT));
     }
 
     #[test]
-    fn test_vertesians_nodeps_const_with_solution() {
+    fn test_nicopap_vertesians_nodeps_const_with_solution() {
         assert_eq!(
-            solve_vertesians_nodeps_const::<WINDOW_SIZE>(crate::INPUT),
+            solve_nicopap_vertesians_nodeps_const::<WINDOW_SIZE>(crate::INPUT),
             1723
         )
     }
 
     #[test]
-    fn test_vertesians_nodeps_const_with_sample_solutions() {
+    fn test_nicopap_vertesians_nodeps_const_with_sample_solutions() {
         for (sample_input, sample_answer) in SAMPLES {
             assert_eq!(
-                solve_vertesians_nodeps_const::<WINDOW_SIZE>(sample_input),
+                solve_nicopap_vertesians_nodeps_const::<WINDOW_SIZE>(sample_input),
+                sample_answer
+            )
+        }
+    }
+
+    #[bench]
+    fn bench_vertesians_3_1(bencher: &mut test::Bencher) {
+        bencher.iter(|| solve_vertesians_nodeps_3_1::<WINDOW_SIZE>(crate::INPUT));
+    }
+
+    #[test]
+    fn test_vertesians_3_1_with_solution() {
+        assert_eq!(
+            solve_vertesians_nodeps_3_1::<WINDOW_SIZE>(crate::INPUT),
+            1723
+        )
+    }
+
+    #[test]
+    fn test_vertesians_3_1_with_sample_solutions() {
+        for (sample_input, sample_answer) in SAMPLES {
+            assert_eq!(
+                solve_vertesians_nodeps_3_1::<WINDOW_SIZE>(sample_input),
                 sample_answer
             )
         }

rust/src/day06/part_2.rs

@@ -287,23 +287,46 @@ mod tests {
     }
 
     #[bench]
-    fn bench_vertesians_nodeps_const(bencher: &mut test::Bencher) {
-        bencher.iter(|| solve_vertesians_nodeps_const::<WINDOW_SIZE>(crate::INPUT));
+    fn bench_nicopap_vertesians_nodeps_const(bencher: &mut test::Bencher) {
+        bencher.iter(|| solve_nicopap_vertesians_nodeps_const::<WINDOW_SIZE>(crate::INPUT));
     }
 
     #[test]
-    fn test_vertesians_nodeps_const_with_solution() {
+    fn test_nicopap_vertesians_nodeps_const_with_solution() {
         assert_eq!(
-            solve_vertesians_nodeps_const::<WINDOW_SIZE>(crate::INPUT),
+            solve_nicopap_vertesians_nodeps_const::<WINDOW_SIZE>(crate::INPUT),
             3708
         )
     }
 
     #[test]
-    fn test_vertesians_nodeps_const_with_sample_solutions() {
+    fn test_nicopap_vertesians_nodeps_const_with_sample_solutions() {
         for (sample_input, sample_answer) in SAMPLES {
             assert_eq!(
-                solve_vertesians_nodeps_const::<WINDOW_SIZE>(sample_input),
+                solve_nicopap_vertesians_nodeps_const::<WINDOW_SIZE>(sample_input),
+                sample_answer
+            )
+        }
+    }
+
+    #[bench]
+    fn bench_vertesians_3_1(bencher: &mut test::Bencher) {
+        bencher.iter(|| solve_vertesians_nodeps_3_1::<WINDOW_SIZE>(crate::INPUT));
+    }
+
+    #[test]
+    fn test_vertesians_3_1_with_solution() {
+        assert_eq!(
+            solve_vertesians_nodeps_3_1::<WINDOW_SIZE>(crate::INPUT),
+            3708
+        )
+    }
+
+    #[test]
+    fn test_vertesians_3_1_with_sample_solutions() {
+        for (sample_input, sample_answer) in SAMPLES {
+            assert_eq!(
+                solve_vertesians_nodeps_3_1::<WINDOW_SIZE>(sample_input),
                 sample_answer
             )
         }

rust/src/day06/solutions.rs

@@ -482,17 +482,17 @@ mod vertesians_nodeps_improved {
     }
 }
 
-pub const fn solve_vertesians_nodeps_const<const N: usize>(input: &'static str) -> usize {
+pub const fn solve_nicopap_vertesians_nodeps_const<const N: usize>(input: &'static str) -> usize {
     // For 0ns results
     // match N {
     //     4 => nicopap_vertesians_const::RESULT_PART_1,
     //     14 => nicopap_vertesians_const::RESULT_PART_2,
     //     _ => unreachable!(),
     // }
-    nicopap_vertesians_const::process::<N>(input.as_bytes())
+    nicopap_vertesians_nodeps_const::process::<N>(input.as_bytes())
 }
 
-mod nicopap_vertesians_const {
+mod nicopap_vertesians_nodeps_const {
     pub(super) const RESULT_PART_1: usize = process::<4>(include_bytes!("./input.txt"));
     pub(super) const RESULT_PART_2: usize = process::<14>(include_bytes!("./input.txt"));
 
@@ -526,3 +526,39 @@ mod nicopap_vertesians_const {
         flipped_count == (N as u32)
     }
 }
+
+pub fn solve_vertesians_nodeps_3_1<const N: usize>(input: &'static str) -> usize {
+    vertesians_nodeps_3_1::main::<N>(input)
+}
+
+mod vertesians_nodeps_3_1 {
+    pub(super) fn main<const N: usize>(input: &'static str) -> usize {
+        let data = input
+            .chars()
+            .map(|c| 1 << (c as u32 - 0x61))
+            .collect::<Vec<u32>>();
+
+        assert!(!data.is_empty(), "Received empty input");
+
+        process::<N>(data)
+    }
+
+    fn process<const N: usize>(data: Vec<u32>) -> usize {
+        for counter in 0.. {
+            let combined = {
+                let mut combined = 0;
+                for i in 0..N {
+                    combined |= data[counter + i];
+                }
+                combined
+            };
+
+            // Thanks to Gibonius for the suggestion to use u32::count_ones()
+            if combined.count_ones() == N as u32 {
+                return counter + N;
+            }
+        }
+
+        panic!("No valid sequence found");
+    }
+}