Compilare: user.cpp:1:18: warning: extra tokens at end of #include directive [enabled by default] #include <cstdio> ^ user.cpp: In function ‘int main()’: user.cpp:69:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&N); ^ user.cpp:71:68: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&v[i]),p[i].pos=i,p[i].val=v[i],Orig[i]=v[i]; ^