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Flow networks and cut capacity

How to use

Add Node: Click anywhere on the canvas.
Add Edge: Click a source node, then a target node. Click an edge to edit its weight.
Move: Drag nodes around.
Pan: Hold mouse and drag background.
Pick Source / Sink: Choose each, then press Compute Min-Cut to get capacity (max-flow).
Custom Cut: Switch to “Start Cut”, click to place polygon points, then “Close & Compute Cut”. Capacity is sum of weights on edges crossing from inside → outside.