最大流 ¶
最大流¶
此示例演示如何使用 maxflow() 在具有边容量的有向图上构造最大流。
import igraph as ig
import matplotlib.pyplot as plt
# Generate the graph with its capacities
g = ig.Graph(
6,
[(3, 2), (3, 4), (2, 1), (4,1), (4, 5), (1, 0), (5, 0)],
directed=True
)
g.es["capacity"] = [7, 8, 1, 2, 3, 4, 5] # capacity of each edge
# Run the max flow
flow = g.maxflow(3, 0, capacity=g.es["capacity"])
print("Max flow:", flow.value)
print("Edge assignments:", flow.flow)
收到的输出是
Max flow: 6.0
Edge assignments [1.0, 5.0, 1.0, 2.0, 3.0, 3.0, 3.0]
流量图¶