Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:45:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j <G[x].size(); j++) ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:121:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<rez.size();i++) ~^~~~~~~~~~~ main.cpp:55:15: warning: unused variable 'nr' [-Wunused-variable] int x,y,i,nr,j,z; ^~ main.cpp:55:20: warning: unused variable 'z' [-Wunused-variable] int x,y,i,nr,j,z; ^