Compilare: main.cpp: In function 'int determine_max_path(std::vector<std::vector<int> >&, int, int)': main.cpp:19:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | if(xnew >= 0 && xnew < m.size() && ynew >=0 && ynew < m[0].size() && m[xnew][ynew] > m[i][j]) d_max[i][j] = std::max(d_max[i][j], determine_max_path(m, xnew, ynew)); | ~~~~~^~~~~~~~~~ main.cpp:19:61: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | if(xnew >= 0 && xnew < m.size() && ynew >=0 && ynew < m[0].size() && m[xnew][ynew] > m[i][j]) d_max[i][j] = std::max(d_max[i][j], determine_max_path(m, xnew, ynew)); | ~~~~~^~~~~~~~~~~~~