util.cc

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// Copyright 2010-2024 Google LLC
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// 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.
 
#include "ortools/graph/util.h"
 
#include <vector>
 
#include "absl/types/span.h"
 
namespace util {
 
bool IsSubsetOf0N(absl::Span<const int> v, int n) {
  std::vector<bool> mask(n, false);
  for (const int i : v) {
    if (i < 0 || i >= n || mask[i]) return false;
    mask[i] = true;
  }
  return true;
}
 
}  // namespace util