[PersistentSimpleSegmentTree - Tourist Implementation](https://codeforces.com/contest/1771/submission/266230747) **Problems:** - https://codeforces.com/contest/1771/problem/F - https://codeforces.com/contest/484/problem/E - https://codeforces.com/contest/786/problem/C - https://codeforces.com/contest/786/problem/B - https://codeforces.com/contest/1208/problem/D - https://codeforces.com/contest/52/problem/C - https://codeforces.com/contest/380/problem/C