Compilare: main.cpp: In function 'int main()': main.cpp:39:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ main.cpp:41:44: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&v[i].x,&v[i].y); ^ main.cpp: In function 'int arie(int)': main.cpp:12:11: warning: 'fst' may be used uninitialized in this function [-Wmaybe-uninitialized] int i,fst,prev,sol; ^~~