Compilare: user.cpp: In function ‘int main()’: user.cpp:15:13: warning: unused variable ‘x’ [-Wunused-variable] int n, x, j = 0; ^ user.cpp:17:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %lld", &n, &s); ^ user.cpp:19:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[0]); ^ user.cpp:21:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i]); ^