Compilare: user.cpp: In function ‘void debug()’: user.cpp:159:11: warning: variable ‘debug1’ set but not used [-Wunused-but-set-variable] coord debug1, debug2; ^ user.cpp: In function ‘int main()’: user.cpp:182:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < coada.front().at(1).size() - 1; i += 2) ^ user.cpp:186:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for0(i, coada.front().at(0).size() - 1) ^ user.cpp:2:39: note: in definition of macro ‘for0’ #define for0(i, n) for(int i = 0; i < n; i++) ^ user.cpp:187:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i + 1; j < coada.front().at(0).size(); j++) ^