Compilare: main.cpp: In function 'int main()': main.cpp:85:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<ob>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | while (i < event.size()) | ~~^~~~~~~~~~~~~~ main.cpp:87:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<ob>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | for (j = i; j < event.size() and event[j].unde == event[i].unde; j++); | ~~^~~~~~~~~~~~~~