Compilare: user.cpp: In function ‘int dfs(int)’: user.cpp:15:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[nod].size(); i++){ ^ user.cpp: In function ‘int main()’: user.cpp:51:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<g[i].size(); j++) ^ user.cpp:66:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<g[i].size(); j++) ^ user.cpp:29:18: warning: unused variable ‘m’ [-Wunused-variable] int i, j, n, m, a, b; ^