Compilare: user.cpp: In function ‘bool find(const int&, const int&)’: user.cpp:31:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[a].size();++i) ^ user.cpp: In function ‘void dfs(int)’: user.cpp:79:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[x].size();++i) ^ user.cpp: In function ‘void read()’: user.cpp:125:27: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[305]’ [-Wformat=] scanf("%s\n",&v[i]); ^ user.cpp: In function ‘void sterge(const int&, const int&)’: user.cpp:132:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[a].size();++i) ^ user.cpp: In function ‘void rez()’: user.cpp:151:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<g[i].size();++j) ^