Compilare: main.cpp: In function 'int32_t main()': main.cpp:52:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[t].size(); i++){ ~^~~~~~~~~~~~ main.cpp:63:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(res.size()!=(m+1) ){cout<<"-1"; return 0;} ~~~~~~~~~~^~~~~~~ main.cpp:64:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<(res.size()-1); i++){ ~^~~~~~~~~~~~~~~