Compilare: user.cpp: In function ‘int main()’: user.cpp:21:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &k); ^ user.cpp:23:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i]); ^ user.cpp:19:22: warning: ‘cl’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n, k, i, j, l, cl; ^