Compilare: main.cpp: In function 'bool inside(short int, short int, std::vector<std::vector<short int> >&)': main.cpp:18:25: warning: comparison of integer expressions of different signedness: 'short int' and 'std::vector<std::vector<short int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | return 0 <= xx and xx < v.size() and 0 <= yy and yy < v[0].size(); | ~~~^~~~~~~~~~ main.cpp:18:55: warning: comparison of integer expressions of different signedness: 'short int' and 'std::vector<short int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | return 0 <= xx and xx < v.size() and 0 <= yy and yy < v[0].size(); | ~~~^~~~~~~~~~~~~ main.cpp: In function 'void solve(std::vector<std::vector<short int> >&, short int)': main.cpp:30:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<short int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for (int i = 0; i < v.size(); i++) { | ~~^~~~~~~~~~ main.cpp:31:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<short int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int j = 0; j < v[0].size(); j++) { | ~~^~~~~~~~~~~~~