#include #include #include #include #include #include #include using namespace std; using uint = unsigned int; using ll = long long; #define CIN( LL , A ) LL A; cin >> A #define GETSEGMENT( A , SEPARATOR ) string A; getline( cin , A , SEPARATOR ) #define GETLINE( A ) string A; getline( cin , A ) #define FOR_LL( VAR , INITIAL , FINAL_PLUS_ONE ) for( ll VAR = INITIAL ; VAR < FINAL_PLUS_ONE ; VAR ++ ) #define FOR_ITR( ARRAY , ITR , END ) for( auto ITR = ARRAY .begin() , END = ARRAY .end() ; ITR != END ; ITR ++ ) #define RETURN( LL , ANSWER ) const LL answer_for_contest = ( ANSWER ); cout << answer_for_contest << endl; return 0 #define DOUBLE( DIGITS , ANSWER ) const double answer_for_contest = ( ANSWER ); cout << fixed << setprecision( DIGITS ) << answer_for_contest << endl; return 0 template inline T Distance( const T& a , const ll& b ){ return a < b ? b - a : a - b; } int main() { CIN( ll , N ); ll count = 1; ll answer = 0; while( count < N ){ count = min( count * 2 , N ); answer++; } RETURN( ll , answer ); }