Compilare: main.cpp: In function 'int main()': main.cpp:76:40: warning: format '%i' expects argument of type 'int', but argument 4 has type 'std::vector<edge>::size_type {aka long unsigned int}' [-Wformat=] fprintf(fout,"%i\n%i\n", c, apm.size()); ^ main.cpp:61:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%i %i", &n, &m); ^ main.cpp:65:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%i %i %i", &x, &y, &c); ^