Compilare: user.cpp: In function ‘int main()’: user.cpp:64:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<hash[*i].size();j++) ^ user.cpp:74:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<hash[*i].size();j++) ^ user.cpp:44:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file,"%d",&n); ^ user.cpp:48:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file,"%d ",&m); ^ user.cpp:52:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file,"%d %d ",&x,&y); ^