Compilare: user.cpp: In function ‘int main()’: user.cpp:28:19: warning: unused variable ‘y’ [-Wunused-variable] int n, k, s, x, y; ^ user.cpp:31:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &n, &k); ^ user.cpp:34:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &x); ^