Compilare: user.cpp: In function ‘int main()’: user.cpp:11:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define min(a,b) ((a<b)?a:b) ^ user.cpp:15:19: note: in definition of macro ‘REP’ for (int i=a; i<=b; i++) ^ user.cpp:85:10: note: in expansion of macro ‘min’ REP(i,0,min(sol.size()-1,999)) ^