Compilare: main.cpp: In function 'void dfs(int)': main.cpp:23:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < q.size(); i++) ~~^~~~~~~~~~ main.cpp:26:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l[x].size(); i++) ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:64:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < muchii[a].size(); j++) ~~^~~~~~~~~~~~~~~~~~ main.cpp:76:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < muchii[b].size(); j++) ~~^~~~~~~~~~~~~~~~~~