Compilare: main.cpp: In function 'int main()': main.cpp:38:37: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::priority_queue<int, std::vector<int>, cmp>::size_type {aka long unsigned int}' [-Wformat=] fprintf(g,"%d\n",heap.size()); ^ main.cpp:24:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ main.cpp:29:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&x,&y); ^