Compilare: main.cpp: In function 'void DSU::rollback(int)': main.cpp:65:21: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 65 | while(st.size() > T) | ~~~~~~~~~~^~~ main.cpp: In function 'void divide(int, int, int, int)': main.cpp:77:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] 77 | int mid = l + r >> 1; | ~~^~~