Compilare: user.cpp: In function ‘int main()’: user.cpp:12:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&n,&k); ^ user.cpp:36:15: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(a[i-1]==0&&i>1) ^