Compilare: main.cpp: In function 'int main()': main.cpp:93:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<prim[l].size();j++) ~^~~~~~~~~~~~~~~ main.cpp:38:32: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread (buff,1,10001000,fin); ^