Compilare: main.cpp: In function 'int main()': main.cpp:63:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for (j = 0; j < s.length(); ++j) | ~~^~~~~~~~~~~~ main.cpp:102:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<ok>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 102 | for (i = 0; i < adj[nod].size(); ++i) | ~~^~~~~~~~~~~~~~~~~ main.cpp:133:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 133 | for (j = 0; j < s.length(); ++j) | ~~^~~~~~~~~~~~ main.cpp:145:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 145 | for (j = 0; j < s.length(); ++j) | ~~^~~~~~~~~~~~ main.cpp:160:17: warning: unused variable 'cost' [-Wunused-variable] 160 | int cost = muchii[i].cost; | ^~~~ main.cpp:51:24: warning: unused variable 'a' [-Wunused-variable] 51 | int c, n, m, i, j, a, b; | ^ main.cpp:51:27: warning: unused variable 'b' [-Wunused-variable] 51 | int c, n, m, i, j, a, b; | ^