Compilare: user.cpp: In function ‘void solve()’: user.cpp:56:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<G[1].size();i++) ^ user.cpp:80:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<G[nod1].size();i++) ^ user.cpp: In function ‘void dfs(int)’: user.cpp:93:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<A[x].size();i++) ^ user.cpp: In function ‘void read()’: user.cpp:109:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&n,&m,&q); ^ user.cpp:113:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&x,&y,&c); ^ user.cpp:120:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&xS,&yS); ^