Compilare: user.cpp: In function ‘int main()’: user.cpp:61:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (flag == 0 && j < suc[i].size()) { ^ user.cpp:73:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i < sol.size();i ++) ^ user.cpp:21:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&n,&target); ^ user.cpp:24:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&v[i]); ^