Compilare: user.cpp: In function ‘int main()’: user.cpp:14:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", &n, &m); ^ user.cpp:17:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &x); ^ user.cpp:11:26: warning: ‘sf’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n, m, i, j, x, in, sf; ^ user.cpp:27:18: warning: ‘in’ may be used uninitialized in this function [-Wmaybe-uninitialized] for (i = in - 1; i >= sf; i--) { ^