Compilare: main.cpp: In function 'int main()': main.cpp:147:26: warning: unused variable 'poz' [-Wunused-variable] ll n , i , s1 , s2 , poz , j; ^~~ main.cpp:147:32: warning: unused variable 'j' [-Wunused-variable] ll n , i , s1 , s2 , poz , j; ^ main.cpp: In function 'void get_ll(ll&)': main.cpp:15:39: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer , sz , 1 , stdin); ^ main.cpp:23:39: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer , sz , 1 , stdin); ^ main.cpp: In function 'int main()': main.cpp:145:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("biscuiti.in" , "r" , stdin); ^ main.cpp:146:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("biscuiti.out" , "w" , stdout); ^