Compilare: main.cpp: In function 'int main()': main.cpp:32:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<g[i].size();j++) ~^~~~~~~~~~~~ main.cpp: In function 'void citire()': main.cpp:57:9: warning: unused variable 'j' [-Wunused-variable] int i,j,x,y,c; ^ main.cpp: In function 'bool dfs(int)': main.cpp:79:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[k].size();i++) ~^~~~~~~~~~~~