Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:14:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<g[x].size();i++) ^ user.cpp: In function ‘void dfss(int)’: user.cpp:21:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<gt[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:40:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<sol[i].size();j++) printf("%d ",sol[i][j]); ^ user.cpp:25:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ user.cpp:27:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^