format all C# files
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@@ -11,21 +11,18 @@
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// """From Bradley, Hax, and Magnanti, 'Applied Mathematical Programming', figure 8.1."""
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// [START program]
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// """From Bradley, Hax, and Magnanti, 'Applied Mathematical Programming',
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// figure 8.1.""" [START program]
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using System;
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using Google.OrTools.Graph;
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public class SimpleMinCostFlowProgram
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{
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static void Main()
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{
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public class SimpleMinCostFlowProgram {
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static void Main() {
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// [START data]
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// Define four parallel arrays: sources, destinations, capacities, and unit costs
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// between each pair. For instance, the arc from node 0 to node 1 has a
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// capacity of 15.
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// Problem taken From Taha's 'Introduction to Operations Research',
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// example 6.4-2.
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// Define four parallel arrays: sources, destinations, capacities, and unit
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// costs between each pair. For instance, the arc from node 0 to node 1 has
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// a capacity of 15. Problem taken From Taha's 'Introduction to Operations
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// Research', example 6.4-2.
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int[] startNodes = {0, 0, 1, 1, 1, 2, 2, 3, 4};
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int[] endNodes = {1, 2, 2, 3, 4, 3, 4, 4, 2};
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int[] capacities = {15, 8, 20, 4, 10, 15, 4, 20, 5};
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@@ -40,16 +37,14 @@ public class SimpleMinCostFlowProgram
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MinCostFlow minCostFlow = new MinCostFlow();
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// Add each arc.
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for (int i = 0; i < startNodes.Length; ++i)
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{
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int arc = minCostFlow.AddArcWithCapacityAndUnitCost(startNodes[i], endNodes[i],
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capacities[i], unitCosts[i]);
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for (int i = 0; i < startNodes.Length; ++i) {
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int arc = minCostFlow.AddArcWithCapacityAndUnitCost(
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startNodes[i], endNodes[i], capacities[i], unitCosts[i]);
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if (arc != i) throw new Exception("Internal error");
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}
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// Add node supplies.
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for (int i = 0; i < supplies.Length; ++i)
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{
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// Add node supplies.
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for (int i = 0; i < supplies.Length; ++i) {
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minCostFlow.SetNodeSupply(i, supplies[i]);
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}
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@@ -61,25 +56,22 @@ public class SimpleMinCostFlowProgram
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// [END solve]
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// [START print_solution]
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if (solveStatus == MinCostFlow.Status.OPTIMAL)
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{
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if (solveStatus == MinCostFlow.Status.OPTIMAL) {
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Console.WriteLine("Minimum cost: " + minCostFlow.OptimalCost());
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Console.WriteLine("");
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Console.WriteLine(" Edge Flow / Capacity Cost");
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for (int i = 0; i < minCostFlow.NumArcs(); ++i)
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{
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for (int i = 0; i < minCostFlow.NumArcs(); ++i) {
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long cost = minCostFlow.Flow(i) * minCostFlow.UnitCost(i);
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Console.WriteLine(minCostFlow.Tail(i) + " -> " +
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minCostFlow.Head(i) + " " +
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string.Format("{0,3}", minCostFlow.Flow(i)) + " / " +
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string.Format ("{0,3}", minCostFlow.Capacity(i)) + " " +
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string.Format ("{0,3}", cost));
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Console.WriteLine(minCostFlow.Tail(i) + " -> " + minCostFlow.Head(i) +
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" " + string.Format("{0,3}", minCostFlow.Flow(i)) +
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" / " +
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string.Format("{0,3}", minCostFlow.Capacity(i)) +
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" " + string.Format("{0,3}", cost));
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}
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}
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else
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{
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Console.WriteLine("Solving the min cost flow problem failed. Solver status: " +
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solveStatus);
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} else {
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Console.WriteLine(
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"Solving the min cost flow problem failed. Solver status: " +
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solveStatus);
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}
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// [END print_solution]
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}
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