Compilare: user.cpp: In function ‘int main()’: user.cpp:17:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x>mx) ^ user.cpp:23:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(x==mx) ^ user.cpp:3:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define x v[i].size() ^ user.cpp:28:23: note: in expansion of macro ‘x’ for(int j=0;j<x;++j) ^ user.cpp:3:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define x v[i].size() ^ user.cpp:68:33: note: in expansion of macro ‘x’ while(w<x && h<y) ^ user.cpp:4:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define y v[r].size() ^ user.cpp:68:40: note: in expansion of macro ‘y’ while(w<x && h<y) ^ user.cpp:3:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define x v[i].size() ^ user.cpp:73:31: note: in expansion of macro ‘x’ if(w==x) ^