Compilare: main.cpp: In function 'double prim(int)': main.cpp:145:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 145 | for(int f = 0 ; f < mm.size() ; f ++) | ~~^~~~~~~~~~~ main.cpp:148:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 148 | for(int f = 0 ; f < mm.size() -1 ; f ++) | ~~^~~~~~~~~~~~~~ main.cpp:150:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 150 | for(int e = 0 ; e < mm.size() ; e ++) | ~~^~~~~~~~~~~ main.cpp:155:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 155 | for(int e = 0 ; e < mm.size() ; e ++) | ~~^~~~~~~~~~~