Compilare: user.cpp: In function ‘int main()’: user.cpp:26:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<rem[rest].size() && !exists; j++) ^ user.cpp:36:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<rem[i].size(); j++) sol.push_back(rem[i][j]); ^ user.cpp:39:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<sol.size(); i++) g<<sol[i].first<<" "<<sol[i].second<<" "; ^