Compilare: main.cpp: In function 'int prim(int)': main.cpp:143:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 143 | for(int f = 1 ; f < mm.size() ; f ++) | ~~^~~~~~~~~~~ main.cpp:159:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 159 | for(int f = 0 ; f < mm.size() ; f ++) | ~~^~~~~~~~~~~