Compilare: user.cpp: In function ‘int main()’: user.cpp:44:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < CTC[i].size();j++) ^ user.cpp: In function ‘void Dfs(int)’: user.cpp:55:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < G[x].size(); i++){ ^ user.cpp: In function ‘void Dfst(int)’: user.cpp:68:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < GT[x].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:22:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(hai,"%d %d", &n,&m); ^ user.cpp:25:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(hai,"%d %d",&x,&y); ^