Compilare: main.cpp: In function 'void Fill(int)': main.cpp:93:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, bool> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 93 | if (I == M.size() - 1 && J == M.size() - 1) | ~~^~~~~~~~~~~~~~~ main.cpp:93:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, bool> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 93 | if (I == M.size() - 1 && J == M.size() - 1) | ~~^~~~~~~~~~~~~~~ main.cpp:105:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, bool> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 105 | if (i >= 0 && i < M.size() && j >= 0 && j < M.size() && M[i][j].second == true) | ~~^~~~~~~~~~ main.cpp:105:55: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, bool> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 105 | if (i >= 0 && i < M.size() && j >= 0 && j < M.size() && M[i][j].second == true) | ~~^~~~~~~~~~ main.cpp: In function 'void Fill_2()': main.cpp:131:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, bool> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 131 | if (I == (M.size() - 1) && J == (M.size() - 1)) | ~~^~~~~~~~~~~~~~~~~ main.cpp:131:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, bool> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 131 | if (I == (M.size() - 1) && J == (M.size() - 1)) | ~~^~~~~~~~~~~~~~~~~ main.cpp:144:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, bool> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 144 | if (0 <= i && i < M.size() && 0 <= j && j < M.size() && M[i][j].second) | ~~^~~~~~~~~~ main.cpp:144:55: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, bool> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 144 | if (0 <= i && i < M.size() && 0 <= j && j < M.size() && M[i][j].second) | ~~^~~~~~~~~~