Compilare: main.cpp: In function 'int main()': main.cpp:59:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for(int j=0; j<cost[varf_min].size(); j++){ | ~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:68:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | for(int j=0; j<tuneluri.size(); j++) | ~^~~~~~~~~~~~~~~~ main.cpp:75:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | for(int i=0; i<tuneluri.size(); i++) | ~^~~~~~~~~~~~~~~~