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use vector instead of unordered_map in gomory

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
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Lev Nachmanson 2023-12-24 07:23:35 -10:00 • committed by Lev Nachmanson
parent a3529a0046
commit 5796e8899f
1 changed files with 7 additions and 7 deletions
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14
src/math/lp/gomory.cpp
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@ -519,8 +519,8 @@ public:
lia_move gomory::get_gomory_cuts(unsigned num_cuts) {
struct cut_result {u_dependency *dep; lar_term t; mpq k; int polarity; lpvar j;};
vector<cut_result> big_cuts;
struct polar_pair {int polarity; u_dependency *dep;};
std::unordered_map<lpvar, polar_pair> polar_vars;
struct polar_info {lpvar j; int polarity; u_dependency *dep;};
vector<polar_info> polar_vars;
unsigned_vector columns_for_cuts = gomory_select_int_infeasible_vars(num_cuts);
// define inline helper functions
@ -556,7 +556,7 @@ public:
continue;
cut_result cr = {cc.m_dep, lia.m_t, lia.m_k, cc.m_polarity, j};
if (abs(cr.polarity) == 1) // need to delay the update of the bounds for j in a polar case, because simplify_inequality relies on the old bounds
polar_vars[j] = {cr.polarity, cc.m_dep};
polar_vars.push_back( {j, cr.polarity, cc.m_dep} );
if (!is_small_cut(lia.m_t)) {
big_cuts.push_back(cr);
@ -584,12 +584,12 @@ public:
// this way we create bounds for the variables in polar cases even where the terms had big numbers
for (auto const& p : polar_vars) {
if (p.second.polarity == 1) {
lra.update_column_type_and_bound(p.first, lp::lconstraint_kind::LE, floor(lra.get_column_value(p.first).x), p.second.dep);
if (p.polarity == 1) {
lra.update_column_type_and_bound(p.j, lp::lconstraint_kind::LE, floor(lra.get_column_value(p.j).x), p.dep);
}
else {
SASSERT(p.second.polarity == -1);
lra.update_column_type_and_bound(p.first, lp::lconstraint_kind::GE, ceil(lra.get_column_value(p.first).x), p.second.dep);
SASSERT(p.polarity == -1);
lra.update_column_type_and_bound(p.j, lp::lconstraint_kind::GE, ceil(lra.get_column_value(p.j).x), p.dep);
}
}