Compilare: main.cpp: In function 'std::pair<Graph<NodeData>, std::vector<std::vector<char> > > buildGraph(std::ifstream&, const size_t&, const size_t&)': main.cpp:284:22: warning: unused variable 'weight' [-Wunused-variable] 284 | bool weight = grid[i][j] != grid[i - 1][j]; | ^~~~~~ main.cpp:291:22: warning: unused variable 'weight' [-Wunused-variable] 291 | bool weight = grid[i][j] != grid[i][j - 1]; | ^~~~~~ main.cpp: In function 'int main()': main.cpp:347:47: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 347 | if (neighbour->getData().distance > current->getData().distance + weight) { | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~