Compilare: main.cpp: In member function 'int Neighbours::getValue(std::pair<int, int>)': main.cpp:28:64: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | if(i + indices.first >= indexedBy && i + indices.first < grid.size() | ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ main.cpp: In constructor 'Graph::Graph(bool)': main.cpp:122:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 122 | for (int i=0;i<parent.size();i++) parent[i] = i; | ~^~~~~~~~~~~~~~ main.cpp: In constructor 'Graph::Graph(int, int, std::vector<std::pair<int, int> >&)': main.cpp:135:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 135 | for (int i=0;i<edges.size();i++) { | ~^~~~~~~~~~~~~ main.cpp: In constructor 'Graph::Graph(int, std::vector<std::vector<int> >&, bool, bool)': main.cpp:149:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 149 | for (int i = 0; i < connections.size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:157:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 157 | for(int i=0;i<connections.size();i++) { | ~^~~~~~~~~~~~~~~~~~~