Compilare: main.cpp: In function 'void lee(int, int, std::queue<std::pair<int, int> >&, int)': main.cpp:32:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | if (ni < 0 || ni >= map.size() || nj < 0 || nj >= map[0].size()) { | ~~~^~~~~~~~~~~~~ main.cpp:32:54: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | if (ni < 0 || ni >= map.size() || nj < 0 || nj >= map[0].size()) { | ~~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:91:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 91 | if (ni < 0 || ni >= map.size() || nj < 0 || nj >= map[0].size()) { | ~~~^~~~~~~~~~~~~ main.cpp:91:54: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 91 | if (ni < 0 || ni >= map.size() || nj < 0 || nj >= map[0].size()) { | ~~~^~~~~~~~~~~~~~~~