Compilare: main.cpp: In function 'int main()': main.cpp:37:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < j.size(); i++) ~~^~~~~~~~~~ main.cpp:45:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <j.size(); i++) ~~^~~~~~~~~ main.cpp:52:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (e[j[i]].size() <= f[j[i]]) continue; ~~~~~~~~~~~~~~~^~~~~~~~~~ main.cpp:61:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i < ans.size(); i++) ~~^~~~~~~~~~~~ main.cpp:65:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i!=ans.size()-1) ~^~~~~~~~~~~~~~