Compilare: main.cpp:22:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 22 | main () | ^~~~ main.cpp: In function 'int main()': main.cpp:57:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<interval>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for (int i = 0;i<intervale.size();++i) | ~^~~~~~~~~~~~~~~~~