Compilare: user.cpp: In function ‘int main()’: user.cpp:24:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind[1]<pos[A[1]].size()&&i>pos[A[1]][ind[1]]) ^ user.cpp:28:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind[1]==pos[A[1]].size()) ^ user.cpp:31:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind[j]<pos[A[j]].size()&&pos[A[j-1]][ind[j-1]]>pos[A[j]][ind[j]]) ^ user.cpp:33:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind[j]==pos[A[j]].size()) ^ user.cpp:14:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&m); ^ user.cpp:16:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&A[i]); ^ user.cpp:18:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&B[i]); ^