"Player 0x4cfde142ae1fc23fa2b052fd7acd5b7731de73f6 submitted 'quadkp_…

…improved' for challenge knapsack"

tig-algorithms/src/knapsack/mod.rs

@@ -104,7 +104,8 @@
 
 // c003_a053
 
-// c003_a054
+pub mod quadkp_improved;
+pub use quadkp_improved as c003_a054;
 
 // c003_a055
 

tig-algorithms/src/knapsack/quadkp_improved/benchmarker_outbound.rs

@@ -0,0 +1,188 @@
+/*!
+Copyright 2024 Rootz
+
+Licensed under the TIG Benchmarker Outbound Game License v1.0 (the "License"); you 
+may not use this file except in compliance with the License. You may obtain a copy 
+of the License at
+
+https://github.com/tig-foundation/tig-monorepo/tree/main/docs/licenses
+
+Unless required by applicable law or agreed to in writing, software distributed
+under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
+language governing permissions and limitations under the License.
+*/
+
+// TIG's UI uses the pattern `tig_challenges::<challenge_name>` to automatically detect your algorithm's challenge
+use anyhow::Result;
+use rand::{SeedableRng, Rng, rngs::StdRng};
+use tig_challenges::knapsack::{Challenge, Solution};
+
+pub fn solve_challenge(challenge: &Challenge) -> Result<Option<Solution>> {
+    let vertex_count = challenge.weights.len();
+
+    let mut item_scores: Vec<(usize, f32)> = (0..vertex_count)
+        .map(|index| {
+            let interaction_sum: i32 = challenge.interaction_values[index].iter().sum();
+            let secondary_score = challenge.values[index] as f32 / challenge.weights[index] as f32;
+            let combined_score = (challenge.values[index] as f32 * 0.75 + interaction_sum as f32 * 0.15 + secondary_score * 0.1) 
+                / challenge.weights[index] as f32;
+            (index, combined_score)
+        })
+        .collect();
+
+    item_scores.sort_unstable_by(|a, b| b.1.partial_cmp(&a.1).unwrap());
+
+    let mut selected_items = Vec::with_capacity(vertex_count);
+    let mut unselected_items = Vec::with_capacity(vertex_count);
+    let mut current_weight = 0;
+    let mut current_value = 0;
+
+    for &(index, _) in &item_scores {
+        if current_weight + challenge.weights[index] <= challenge.max_weight {
+            current_weight += challenge.weights[index];
+            current_value += challenge.values[index] as i32;
+
+            for &selected in &selected_items {
+                current_value += challenge.interaction_values[index][selected];
+            }
+            selected_items.push(index);
+        } else {
+            unselected_items.push(index);
+        }
+    }
+
+    let mut mutation_rates = vec![0; vertex_count];
+    for index in 0..vertex_count {
+        mutation_rates[index] = challenge.values[index] as i32;
+        for &selected in &selected_items {
+            mutation_rates[index] += challenge.interaction_values[index][selected];
+        }
+    }
+
+    let max_generations = 150;
+    let mut cooling_schedule = vec![0; vertex_count];
+    let mut rng = StdRng::seed_from_u64(challenge.seed[0] as u64);
+
+    for generation in 0..max_generations {
+        let mut best_gain = 0;
+        let mut best_swap = None;
+
+        for (u_index, &mutant) in unselected_items.iter().enumerate() {
+            if cooling_schedule[mutant] > 0 {
+                continue;
+            }
+
+            let mutant_fitness = mutation_rates[mutant];
+            let extra_weight = challenge.weights[mutant] as i32 - (challenge.max_weight as i32 - current_weight as i32);
+
+            if mutant_fitness < 0 {
+                continue;
+            }
+
+            for (c_index, &selected) in selected_items.iter().enumerate() {
+                if cooling_schedule[selected] > 0 {
+                    continue;
+                }
+
+                if extra_weight > 0 && (challenge.weights[selected] as i32) < extra_weight {
+                    continue;
+                }
+
+                let interaction_penalty = (challenge.interaction_values[mutant][selected] as f32 * 0.3) as i32;
+                let fitness_gain = mutant_fitness - mutation_rates[selected] - interaction_penalty;
+
+                if fitness_gain > best_gain {
+                    best_gain = fitness_gain;
+                    best_swap = Some((u_index, c_index));
+                }
+            }
+        }
+
+        if let Some((u_index, c_index)) = best_swap {
+            let added_item = unselected_items[u_index];
+            let removed_item = selected_items[c_index];
+
+            selected_items.swap_remove(c_index);
+            unselected_items.swap_remove(u_index);
+            selected_items.push(added_item);
+            unselected_items.push(removed_item);
+
+            current_value += best_gain;
+            current_weight = current_weight + challenge.weights[added_item] - challenge.weights[removed_item];
+
+            if current_weight > challenge.max_weight {
+                continue;
+            }
+
+            for index in 0..vertex_count {
+                mutation_rates[index] += challenge.interaction_values[index][added_item]
+                    - challenge.interaction_values[index][removed_item];
+            }
+
+            cooling_schedule[added_item] = 3;
+            cooling_schedule[removed_item] = 3;
+        }
+
+        if current_value as u32 >= challenge.min_value {
+            return Ok(Some(Solution { items: selected_items }));
+        }
+
+        for cooling_rate in cooling_schedule.iter_mut() {
+            *cooling_rate = if *cooling_rate > 0 { *cooling_rate - 1 } else { 0 };
+        }
+
+        if current_value as u32 > (challenge.min_value * 9 / 10) {
+            let high_potential_items: Vec<usize> = unselected_items
+                .iter()
+                .filter(|&&i| challenge.values[i] as i32 > (challenge.min_value as i32 / 4))
+                .copied()
+                .collect();
+
+            for &item in high_potential_items.iter().take(2) {
+                if current_weight + challenge.weights[item] <= challenge.max_weight {
+                    selected_items.push(item);
+                    unselected_items.retain(|&x| x != item);
+                    current_weight += challenge.weights[item];
+                    current_value += challenge.values[item] as i32;
+
+                    for &selected in &selected_items {
+                        if selected != item {
+                            current_value += challenge.interaction_values[item][selected];
+                        }
+                    }
+
+                    if current_value as u32 >= challenge.min_value {
+                        return Ok(Some(Solution { items: selected_items }));
+                    }
+                }
+            }
+        }
+    }
+
+    if current_value as u32 >= challenge.min_value && current_weight <= challenge.max_weight {
+        Ok(Some(Solution { items: selected_items }))
+    } else {
+        Ok(None)
+    }
+}
+
+#[cfg(feature = "cuda")]
+mod gpu_optimisation {
+    use super::*;
+    use cudarc::driver::*;
+    use std::{collections::HashMap, sync::Arc};
+    use tig_challenges::CudaKernel;
+
+    pub const KERNEL: Option<CudaKernel> = None;
+
+    pub fn cuda_solve_challenge(
+        challenge: &Challenge,
+        dev: &Arc<CudaDevice>,
+        mut funcs: HashMap<&'static str, CudaFunction>,
+    ) -> anyhow::Result<Option<Solution>> {
+        solve_challenge(challenge)
+    }
+}
+#[cfg(feature = "cuda")]
+pub use gpu_optimisation::{cuda_solve_challenge, KERNEL};

tig-algorithms/src/knapsack/quadkp_improved/commercial.rs

@@ -0,0 +1,188 @@
+/*!
+Copyright 2024 Rootz
+
+Licensed under the TIG Commercial License v1.0 (the "License"); you 
+may not use this file except in compliance with the License. You may obtain a copy 
+of the License at
+
+https://github.com/tig-foundation/tig-monorepo/tree/main/docs/licenses
+
+Unless required by applicable law or agreed to in writing, software distributed
+under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
+language governing permissions and limitations under the License.
+*/
+
+// TIG's UI uses the pattern `tig_challenges::<challenge_name>` to automatically detect your algorithm's challenge
+use anyhow::Result;
+use rand::{SeedableRng, Rng, rngs::StdRng};
+use tig_challenges::knapsack::{Challenge, Solution};
+
+pub fn solve_challenge(challenge: &Challenge) -> Result<Option<Solution>> {
+    let vertex_count = challenge.weights.len();
+
+    let mut item_scores: Vec<(usize, f32)> = (0..vertex_count)
+        .map(|index| {
+            let interaction_sum: i32 = challenge.interaction_values[index].iter().sum();
+            let secondary_score = challenge.values[index] as f32 / challenge.weights[index] as f32;
+            let combined_score = (challenge.values[index] as f32 * 0.75 + interaction_sum as f32 * 0.15 + secondary_score * 0.1) 
+                / challenge.weights[index] as f32;
+            (index, combined_score)
+        })
+        .collect();
+
+    item_scores.sort_unstable_by(|a, b| b.1.partial_cmp(&a.1).unwrap());
+
+    let mut selected_items = Vec::with_capacity(vertex_count);
+    let mut unselected_items = Vec::with_capacity(vertex_count);
+    let mut current_weight = 0;
+    let mut current_value = 0;
+
+    for &(index, _) in &item_scores {
+        if current_weight + challenge.weights[index] <= challenge.max_weight {
+            current_weight += challenge.weights[index];
+            current_value += challenge.values[index] as i32;
+
+            for &selected in &selected_items {
+                current_value += challenge.interaction_values[index][selected];
+            }
+            selected_items.push(index);
+        } else {
+            unselected_items.push(index);
+        }
+    }
+
+    let mut mutation_rates = vec![0; vertex_count];
+    for index in 0..vertex_count {
+        mutation_rates[index] = challenge.values[index] as i32;
+        for &selected in &selected_items {
+            mutation_rates[index] += challenge.interaction_values[index][selected];
+        }
+    }
+
+    let max_generations = 150;
+    let mut cooling_schedule = vec![0; vertex_count];
+    let mut rng = StdRng::seed_from_u64(challenge.seed[0] as u64);
+
+    for generation in 0..max_generations {
+        let mut best_gain = 0;
+        let mut best_swap = None;
+
+        for (u_index, &mutant) in unselected_items.iter().enumerate() {
+            if cooling_schedule[mutant] > 0 {
+                continue;
+            }
+
+            let mutant_fitness = mutation_rates[mutant];
+            let extra_weight = challenge.weights[mutant] as i32 - (challenge.max_weight as i32 - current_weight as i32);
+
+            if mutant_fitness < 0 {
+                continue;
+            }
+
+            for (c_index, &selected) in selected_items.iter().enumerate() {
+                if cooling_schedule[selected] > 0 {
+                    continue;
+                }
+
+                if extra_weight > 0 && (challenge.weights[selected] as i32) < extra_weight {
+                    continue;
+                }
+
+                let interaction_penalty = (challenge.interaction_values[mutant][selected] as f32 * 0.3) as i32;
+                let fitness_gain = mutant_fitness - mutation_rates[selected] - interaction_penalty;
+
+                if fitness_gain > best_gain {
+                    best_gain = fitness_gain;
+                    best_swap = Some((u_index, c_index));
+                }
+            }
+        }
+
+        if let Some((u_index, c_index)) = best_swap {
+            let added_item = unselected_items[u_index];
+            let removed_item = selected_items[c_index];
+
+            selected_items.swap_remove(c_index);
+            unselected_items.swap_remove(u_index);
+            selected_items.push(added_item);
+            unselected_items.push(removed_item);
+
+            current_value += best_gain;
+            current_weight = current_weight + challenge.weights[added_item] - challenge.weights[removed_item];
+
+            if current_weight > challenge.max_weight {
+                continue;
+            }
+
+            for index in 0..vertex_count {
+                mutation_rates[index] += challenge.interaction_values[index][added_item]
+                    - challenge.interaction_values[index][removed_item];
+            }
+
+            cooling_schedule[added_item] = 3;
+            cooling_schedule[removed_item] = 3;
+        }
+
+        if current_value as u32 >= challenge.min_value {
+            return Ok(Some(Solution { items: selected_items }));
+        }
+
+        for cooling_rate in cooling_schedule.iter_mut() {
+            *cooling_rate = if *cooling_rate > 0 { *cooling_rate - 1 } else { 0 };
+        }
+
+        if current_value as u32 > (challenge.min_value * 9 / 10) {
+            let high_potential_items: Vec<usize> = unselected_items
+                .iter()
+                .filter(|&&i| challenge.values[i] as i32 > (challenge.min_value as i32 / 4))
+                .copied()
+                .collect();
+
+            for &item in high_potential_items.iter().take(2) {
+                if current_weight + challenge.weights[item] <= challenge.max_weight {
+                    selected_items.push(item);
+                    unselected_items.retain(|&x| x != item);
+                    current_weight += challenge.weights[item];
+                    current_value += challenge.values[item] as i32;
+
+                    for &selected in &selected_items {
+                        if selected != item {
+                            current_value += challenge.interaction_values[item][selected];
+                        }
+                    }
+
+                    if current_value as u32 >= challenge.min_value {
+                        return Ok(Some(Solution { items: selected_items }));
+                    }
+                }
+            }
+        }
+    }
+
+    if current_value as u32 >= challenge.min_value && current_weight <= challenge.max_weight {
+        Ok(Some(Solution { items: selected_items }))
+    } else {
+        Ok(None)
+    }
+}
+
+#[cfg(feature = "cuda")]
+mod gpu_optimisation {
+    use super::*;
+    use cudarc::driver::*;
+    use std::{collections::HashMap, sync::Arc};
+    use tig_challenges::CudaKernel;
+
+    pub const KERNEL: Option<CudaKernel> = None;
+
+    pub fn cuda_solve_challenge(
+        challenge: &Challenge,
+        dev: &Arc<CudaDevice>,
+        mut funcs: HashMap<&'static str, CudaFunction>,
+    ) -> anyhow::Result<Option<Solution>> {
+        solve_challenge(challenge)
+    }
+}
+#[cfg(feature = "cuda")]
+pub use gpu_optimisation::{cuda_solve_challenge, KERNEL};