void lock_pairs(void)
Alex spent three days staring at a "No Cycle" function, battling the dark magic of . "How do I know if I'm pointing back to where I started?" Alex cried out. After many mugs of coffee and failed check50 runs, the logic clicked. To see if an arrow from A to B would create a cycle, Alex had to check if B already had a path leading back to A. The Source of Victory Cs50 Tideman Solution
If you’re stuck, run check50 after completing each function, use printf debugging to see the state of preferences and pairs , and draw the cycle detection logic on paper. void lock_pairs(void) Alex spent three days staring at
Then came the graph.