Compilare: main.cpp: In function 'void dijk()': main.cpp:34:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for (int i = 0; i < v[smallest.second].size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void backtrack(int, int, std::vector<int>&)': main.cpp:54:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | if (idx == targets.size()) { | ~~~~^~~~~~~~~~~~~~~~~ main.cpp:59:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for (int i = 0; i < unitati.size(); ++i) { | ~~^~~~~~~~~~~~~~~~