My current rating is 656, I participated in this round and solved 3 problems, as my rating is below 1600 this round should be rated for me, but when I check the graph in profile, it shows as unrated, can someone please explain why it is so, Am I missing some condition here?

Position of M targets are given in M lines the first integer is X coordinate and second int is Y coordinate. Be careful though as it uses 1 based indexing