Compilare: main.cpp: In function 'void FillGrid()': main.cpp:46:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < grid.size(); i++){ ~~^~~~~~~~~~~~~ main.cpp:47:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < grid[i].size(); j++){ ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void RezolveMaze()': main.cpp:60:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int x = 0; x < grid.size(); x++){ ~~^~~~~~~~~~~~~ main.cpp:61:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int y = 0; y < grid.size(); y++){ ~~^~~~~~~~~~~~~ main.cpp:64:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (x < grid.size() - 1){ ~~^~~~~~~~~~~~~~~~~ main.cpp:90:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (y < grid.size() - 1){ ~~^~~~~~~~~~~~~~~~~