Compilare: main.cpp: In function 'int main()': main.cpp:77:68: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%lld%lld%lld%lld%lld%lld",&x0,&rx,&nx,&y0,&ry,&ny); ^ main.cpp:75:55: warning: 'amax' may be used uninitialized in this function [-Wmaybe-uninitialized] long long x0 , rx , nx , y0 , ry , ny , sum , i , amax; ^~~~