Compilare: main.cpp: In function 'int main()': main.cpp:23:35: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::priority_queue<int, std::vector<int>, std::greater<int> >::size_type {aka long unsigned int}' [-Wformat=] fprintf(fout,"%d\n", hp.size()); ^ main.cpp:13:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ main.cpp:16:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&nr); ^ main.cpp:19:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&a); ^