Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:51:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[nod].size(); ++ i) ^ user.cpp: In function ‘void Euler(int)’: user.cpp:106:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Comp[nod].size(); ++ i) ^ user.cpp:125:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < T[nod].size(); ++ i) ^ user.cpp: In function ‘void Read()’: user.cpp:33:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:35:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ user.cpp:39:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &u, &v); ^