Hello,
I'm trying to solve 446C - DZY Loves Fibonacci Numbers and i can't debug my code. I'm simply using a segment tree to get the sums.I would really be happy if someone could tell me my mistakes.

Just a missclick pls ignore this blog

Hi, Ok so i solved this problem by converting the map to a graph and then merging all vertices that are in the same country and then i found the minimum connecting subgraph for the 3 vertices. ok now the strange part is that in test case 5, n and m are 1000 and my solution passes this test but in test case 19 n, m are 995 and 997 but i get Memory Limit Exceeded and i cant understand why. i would be grateful if someone helped me out. Thanks...
The link to my submission: 13957392
The link to the problem: 590C - Три государства