Compilare: user.cpp: In function ‘void getCompanies()’: user.cpp:42:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FORN(i, n) for(int i = 0; i < (n); ++i) ^ user.cpp:130:3: note: in expansion of macro ‘FORN’ FORN(j, lines[i].SZ) ^ user.cpp: In function ‘int solve()’: user.cpp:42:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FORN(i, n) for(int i = 0; i < (n); ++i) ^ user.cpp:214:2: note: in expansion of macro ‘FORN’ FORN(i, companySizes.SZ) ^