Compilare: main.cpp: In function 'int main()': main.cpp:28:32: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::priority_queue<int>::size_type {aka long unsigned int}' [-Wformat=] fprintf(out,"%d\n",p.size()); ^ main.cpp:17:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&P); ^ main.cpp:20:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&a,&b); ^