Compilare: user.cpp: In function ‘int main()’: user.cpp:85:30: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘int’ [-Wformat=] fprintf(fout, "%lld\n", S); ^ user.cpp:57:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:60:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &N); ^ user.cpp:63:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i]); ^