Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:18:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[dad].size();i++){ ^ user.cpp: In function ‘void eulerCycle(int)’: user.cpp:36:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<g[son].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:55:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&n,&m); ^ user.cpp:58:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&v1,&v2); ^