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help: how to solve CSES Traffic lights?
Problem link: https://cses.fi/problemset/task/1163
Hello, I am using an interval tree to solve this problem but for 2 test-cases my solution are timing out. I have provided a drawing for the sample input given in the problem description. https://codeforces.net/6d6ba2/rough_work.PNG
Could you please help me
