# include < iostream > # include < vector > using namespace std ; int main ( ) { cin . tie ( NULL ) ; vector < int > Primes ; Primes . push_back ( 2 ) ; Primes . push_back ( 3 ) ; for ( int i = 4 ; i < 1000 ; i + + ) { bool IsPrime = true ; if ( i % 2 = = 0 | | i % 3 = = 0 ) continue ; for ( int j = 4 ; j < i ; j + + ) { if ( i % j = = 0 ) { IsPrime = false ; break ; } } if ( IsPrime ) Primes . push_back ( i ) ; } int N , Count = 0 ; cin > > N ; for ( int i = 0 ; i < N ; i + + ) { int Input ; cin > > Input ; for ( int j = 0 ; j < Primes . size ( ) ; j + + ) if ( Input = = Primes [ j ] ) Count + + ; } cout < < Count < < " \n " ; return 0 ; }
댓글
댓글 쓰기