From 1978a7a88af754bbd64e15a7df1407dea4ef850d Mon Sep 17 00:00:00 2001 From: FiveMovesAhead Date: Mon, 1 Dec 2025 15:20:17 +0000 Subject: [PATCH] Submitted satisfiability/sat_global_opt --- tig-algorithms/src/satisfiability/mod.rs | 3 +- .../satisfiability/sat_global_opt/README.md | 23 ++ .../src/satisfiability/sat_global_opt/mod.rs | 266 ++++++++++++++++++ 3 files changed, 291 insertions(+), 1 deletion(-) create mode 100644 tig-algorithms/src/satisfiability/sat_global_opt/README.md create mode 100644 tig-algorithms/src/satisfiability/sat_global_opt/mod.rs diff --git a/tig-algorithms/src/satisfiability/mod.rs b/tig-algorithms/src/satisfiability/mod.rs index 22d6805c..1cbb8b06 100644 --- a/tig-algorithms/src/satisfiability/mod.rs +++ b/tig-algorithms/src/satisfiability/mod.rs @@ -78,7 +78,8 @@ // c001_a040 -// c001_a041 +pub mod sat_global_opt; +pub use sat_global_opt as c001_a041; // c001_a042 diff --git a/tig-algorithms/src/satisfiability/sat_global_opt/README.md b/tig-algorithms/src/satisfiability/sat_global_opt/README.md new file mode 100644 index 00000000..575d3183 --- /dev/null +++ b/tig-algorithms/src/satisfiability/sat_global_opt/README.md @@ -0,0 +1,23 @@ +# TIG Code Submission + +## Submission Details + +* **Challenge Name:** satisfiability +* **Algorithm Name:** sat_global_opt +* **Copyright:** 2024 syebastian +* **Identity of Submitter:** syebastian +* **Identity of Creator of Algorithmic Method:** null +* **Unique Algorithm Identifier (UAI):** null + +## License + +The files in this folder are under the following licenses: +* TIG Benchmarker Outbound License +* TIG Commercial License +* TIG Inbound Game License +* TIG Innovator Outbound Game License +* TIG Open Data License +* TIG THV Game License + +Copies of the licenses can be obtained at: +https://github.com/tig-foundation/tig-monorepo/tree/main/docs/licenses \ No newline at end of file diff --git a/tig-algorithms/src/satisfiability/sat_global_opt/mod.rs b/tig-algorithms/src/satisfiability/sat_global_opt/mod.rs new file mode 100644 index 00000000..45beef58 --- /dev/null +++ b/tig-algorithms/src/satisfiability/sat_global_opt/mod.rs @@ -0,0 +1,266 @@ +use rand::{rngs::{SmallRng, StdRng}, Rng, SeedableRng}; +use std::collections::HashMap; +use serde_json::{Map, Value}; +use tig_challenges::satisfiability::*; + +pub fn solve_challenge( + challenge: &Challenge, + save_solution: &dyn Fn(&Solution) -> anyhow::Result<()>, + hyperparameters: &Option>, +) -> anyhow::Result<()> { + let _ = save_solution(&Solution { variables: vec![false; challenge.num_variables] }); + let mut rng = SmallRng::seed_from_u64(u64::from_le_bytes(challenge.seed[..8].try_into().unwrap()) as u64); + + let mut p_single = vec![false; challenge.num_variables]; + let mut n_single = vec![false; challenge.num_variables]; + + let mut clauses_ = challenge.clauses.clone(); + let mut clauses: Vec> = Vec::with_capacity(clauses_.len()); + + let mut rounds = 0; + + let mut dead = false; + + while !(dead) { + let mut done = true; + for c in &clauses_ { + let mut c_: Vec = Vec::with_capacity(c.len()); // Preallocate with capacity + let mut skip = false; + for (i, l) in c.iter().enumerate() { + if (p_single[(l.abs() - 1) as usize] && *l > 0) + || (n_single[(l.abs() - 1) as usize] && *l < 0) + || c[(i + 1)..].contains(&-l) + { + skip = true; + break; + } else if p_single[(l.abs() - 1) as usize] + || n_single[(l.abs() - 1) as usize] + || c[(i + 1)..].contains(&l) + { + done = false; + continue; + } else { + c_.push(*l); + } + } + if skip { + done = false; + continue; + }; + match c_[..] { + [l] => { + done = false; + if l > 0 { + if n_single[(l.abs() - 1) as usize] { + dead = true; + break; + } else { + p_single[(l.abs() - 1) as usize] = true; + } + } else { + if p_single[(l.abs() - 1) as usize] { + dead = true; + break; + } else { + n_single[(l.abs() - 1) as usize] = true; + } + } + } + [] => { + dead = true; + break; + } + _ => { + clauses.push(c_); + } + } + } + if done { + break; + } else { + clauses_ = clauses; + clauses = Vec::with_capacity(clauses_.len()); + } + } + + if dead { + return Ok(()); + } + + let num_variables = challenge.num_variables; + let num_clauses = clauses.len(); + + let mut p_clauses: Vec> = vec![Vec::new(); num_variables]; + let mut n_clauses: Vec> = vec![Vec::new(); num_variables]; + + // Preallocate capacity for p_clauses and n_clauses + for c in &clauses { + for &l in c { + let var = (l.abs() - 1) as usize; + if l > 0 { + if p_clauses[var].capacity() == 0 { + p_clauses[var] = Vec::with_capacity(clauses.len() / num_variables + 1); + } + } else { + if n_clauses[var].capacity() == 0 { + n_clauses[var] = Vec::with_capacity(clauses.len() / num_variables + 1); + } + } + } + } + + for (i, &ref c) in clauses.iter().enumerate() { + for &l in c { + let var = (l.abs() - 1) as usize; + if l > 0 { + p_clauses[var].push(i); + } else { + n_clauses[var].push(i); + } + } + } + + let mut variables = vec![false; num_variables]; + for v in 0..num_variables { + let num_p = p_clauses[v].len(); + let num_n = n_clauses[v].len(); + + let nad = 1.28; + let mut vad = nad + 1.0; + if num_n > 0 { + vad = num_p as f32 / num_n as f32; + } + + if vad <= nad { + variables[v] = false; + } else { + let prob = num_p as f64 / (num_p + num_n).max(1) as f64; + variables[v] = rng.gen_bool(prob) + } + } + + let mut num_good_so_far: Vec = vec![0; num_clauses]; + for (i, &ref c) in clauses.iter().enumerate() { + for &l in c { + let var = (l.abs() - 1) as usize; + if l > 0 && variables[var] { + num_good_so_far[i] += 1 + } else if l < 0 && !variables[var] { + num_good_so_far[i] += 1 + } + } + } + + + let mut residual_ = Vec::with_capacity(num_clauses); + let mut residual_indices = vec![None; num_clauses]; + + for (i, &num_good) in num_good_so_far.iter().enumerate() { + if num_good == 0 { + residual_.push(i); + residual_indices[i] = Some(residual_.len() - 1); + } + } + + let clauses_ratio = (challenge.clauses.len() * 100 / challenge.num_variables) as f64; + let num_vars = challenge.num_variables as f64; + let max_fuel = 2000000000.0; + let base_fuel = (2000.0 + 40.0 * clauses_ratio) * num_vars; + let flip_fuel = 350.0 + 0.9 * clauses_ratio; + let max_num_rounds = ((max_fuel - base_fuel) / flip_fuel) as usize; + loop { + if !residual_.is_empty() { + + let rand_val = rng.gen::(); + + let i = residual_[rand_val % residual_.len()]; + let mut min_sad = clauses.len(); + let mut v_min_sad = usize::MAX; + let c = &mut clauses[i]; + + if c.len() > 1 { + let random_index = rand_val % c.len(); + c.swap(0, random_index); + } + for &l in c.iter() { + let abs_l = l.abs() as usize - 1; + let clauses_to_check = if variables[abs_l] { &p_clauses[abs_l] } else { &n_clauses[abs_l] }; + + let mut sad = 0; + for &c in clauses_to_check { + if num_good_so_far[c] == 1 { + sad += 1; + } + } + + if sad < min_sad { + min_sad = sad; + v_min_sad = abs_l; + } + } + + let v = if min_sad == 0 { + v_min_sad + } else if rng.gen_bool(0.5) { + c[0].abs() as usize - 1 + } else { + v_min_sad + }; + + if variables[v] { + for &c in &n_clauses[v] { + num_good_so_far[c] += 1; + if num_good_so_far[c] == 1 { + let i = residual_indices[c].take().unwrap(); + let last = residual_.pop().unwrap(); + if i < residual_.len() { + residual_[i] = last; + residual_indices[last] = Some(i); + } + } + } + for &c in &p_clauses[v] { + if num_good_so_far[c] == 1 { + residual_.push(c); + residual_indices[c] = Some(residual_.len() - 1); + } + num_good_so_far[c] -= 1; + } + } else { + for &c in &n_clauses[v] { + if num_good_so_far[c] == 1 { + residual_.push(c); + residual_indices[c] = Some(residual_.len() - 1); + } + num_good_so_far[c] -= 1; + } + + for &c in &p_clauses[v] { + num_good_so_far[c] += 1; + if num_good_so_far[c] == 1 { + let i = residual_indices[c].take().unwrap(); + let last = residual_.pop().unwrap(); + if i < residual_.len() { + residual_[i] = last; + residual_indices[last] = Some(i); + } + } + } + } + + variables[v] = !variables[v]; + } else { + break; + } + rounds += 1; + if rounds >= max_num_rounds { + return Ok(()); + } + } + let _ = save_solution(&Solution { variables }); + return Ok(()); +} + +pub fn help() { + println!("No help information available."); +}