Compilare: main.cpp: In function 'int main()': main.cpp:32:25: warning: unused variable 'x' [-Wunused-variable] int t , p , i , n , x , y , rx , ry , j , mch , nod , taken , vec; ^ main.cpp:32:29: warning: unused variable 'y' [-Wunused-variable] int t , p , i , n , x , y , rx , ry , j , mch , nod , taken , vec; ^ main.cpp:32:33: warning: unused variable 'rx' [-Wunused-variable] int t , p , i , n , x , y , rx , ry , j , mch , nod , taken , vec; ^~ main.cpp:32:38: warning: unused variable 'ry' [-Wunused-variable] int t , p , i , n , x , y , rx , ry , j , mch , nod , taken , vec; ^~ main.cpp:32:47: warning: variable 'mch' set but not used [-Wunused-but-set-variable] int t , p , i , n , x , y , rx , ry , j , mch , nod , taken , vec; ^~~ main.cpp:34:15: warning: unused variable 'cst2' [-Wunused-variable] long long cst2 , cst , mini; ^~~~ main.cpp:34:22: warning: unused variable 'cst' [-Wunused-variable] long long cst2 , cst , mini; ^~~ main.cpp:35:37: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread (buff , 1, 10000000 , fin); ^