Compilare: main.cpp: In function 'int main()': main.cpp:83:30: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'long long int' [-Wformat=] fprintf(fout,"%ld\n",cost); ^ main.cpp: In function 'void read(int&)': main.cpp:19:45: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,buff_dim,fin),poz=0; ^ main.cpp:24:45: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,buff_dim,fin),poz=0; ^ main.cpp: In function 'int main()': main.cpp:68:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^