Compilare: main.cpp: In constructor 'node::node(int, int)': main.cpp:25:45: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] 25 | node(int l, int r) : lo(l), hi(r), mid(l+r>>1), ma(0ll), delta(0ll) { | ~^~ main.cpp: In function 'int main()': main.cpp:112:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 112 | while (ptr < events.size() && events[ptr].first == i && events[ptr].second == 0) { | ~~~~^~~~~~~~~~~~~~~ main.cpp:118:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 118 | while (ptr < events.size() && events[ptr].first == i && events[ptr].second == 1) { | ~~~~^~~~~~~~~~~~~~~