Compilare: main.cpp: In function 'll log(ll)': main.cpp:19:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; (1LL << i) <= x ; ++ i); ~~~~~~~~~~~^~~~ main.cpp: In function 'int main()': main.cpp:50:28: warning: left shift count >= width of type [-Wshift-count-overflow] p2 = (1 << 62); ^~ main.cpp:29:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("abx.in" , "r" , stdin); ^ main.cpp:30:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("abx.out" , "w" , stdout); ^ main.cpp:32:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%lld" , &n , &m); ^ main.cpp:36:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%lld" , &a); ^ main.cpp:37:27: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] ll dmin = m + 1 , ans; ^~~