Compilare: main.cpp: In function 'bool dfs(int, int)': main.cpp:24:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(index == sir.size()) ~~~~~~^~~~~~~~~~~~~ main.cpp:27:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'bool bfs(int, int)': main.cpp:50:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(aux.ind == sir.size()) ~~~~~~~~^~~~~~~~~~~~~ main.cpp:57:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[aux.nod].size(); i++) ~^~~~~~~~~~~~~~~~~~