Compilare: main.cpp: In function 'int main()': main.cpp:52:25: warning: unused variable 'v1' [-Wunused-variable] 52 | int v1 = *it; | ^~ main.cpp:53:25: warning: unused variable 'v2' [-Wunused-variable] 53 | int v2 = *it2; | ^~ main.cpp:61:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for (j = 1; j < interv.size(); j++) | ~~^~~~~~~~~~~~~~~