Compilare: main.cpp: In function 'void solve()': main.cpp:30:28: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 30 | if (lin[i].count() != (n >> 1) || col[i].count() != (n >> 1)) | ~~~~~~~~~~~~~~~^~~~~~~~~~~ main.cpp:30:58: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 30 | if (lin[i].count() != (n >> 1) || col[i].count() != (n >> 1)) | ~~~~~~~~~~~~~~~^~~~~~~~~~~