Practice Strategy

When you see a new problem, look for signals:

$1.$ Read the problem twice

$2.$ Identify the graph type (directed/undirected, weighted/unweighted)

$3.$ Check for phrases like "can reach both ways", "minimum cost", "critical edges"

$4.$ Match to technique signals from Unit $1$

If you see multiple signals, you might need to combine techniques. Practice on mixed problem sets to build pattern recognition speed. Time yourself to check if you can identify the technique within $2$ minutes of reading.