public static void main ( String [ ] args ) throws IOException {
  BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  PrintWriter pw = new PrintWriter ( System . out ) ;
  StringTokenizer st = new StringTokenizer ( br . readLine ( ) ) ;
  int n = Integer . parseInt ( st . nextToken ( ) ) ;
  int m = Integer . parseInt ( st . nextToken ( ) ) ;
  int k = Integer . parseInt ( st . nextToken ( ) . substring ( 2 ) ) ;
  TreeMap < String , Integer > skills = new TreeMap < > ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    st = new StringTokenizer ( br . readLine ( ) ) ;
    String skillName = st . nextToken ( ) ;
    int skillScore = Integer . parseInt ( st . nextToken ( ) ) ;
    int newSkillScore = skillScore * k / 100 ;
    if ( newSkillScore < 100 ) continue ;
    skills . put ( skillName , newSkillScore ) ;
  }
  for ( int i = 0 ;
  i < m ;
  i ++ ) {
    String skillName = br . readLine ( ) ;
    if ( skills . containsKey ( skillName ) ) continue ;
    skills . put ( skillName , 0 ) ;
  }
  pw . println ( skills . size ( ) ) ;
  for ( Map . Entry < String , Integer > skill : skills . entrySet ( ) ) pw . println ( skill . getKey ( ) + " " + skill . getValue ( ) ) ;
  pw . flush ( ) ;
  pw . close ( ) ;
}

public static void main ( String [ ] args ) throws IOException { BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ; PrintWriter pw = new PrintWriter ( System . out ) ; StringTokenizer st = new StringTokenizer ( br . readLine ( ) ) ; int n = Integer . parseInt ( st . nextToken ( ) ) ; int m = Integer . parseInt ( st . nextToken ( ) ) ; int k = Integer . parseInt ( st . nextToken ( ) . substring ( 2 ) ) ; TreeMap < String , Integer > skills = new TreeMap < > ( ) ; for ( int i = 0 ; i < n ; i ++ ) { st = new StringTokenizer ( br . readLine ( ) ) ; String skillName = st . nextToken ( ) ; int skillScore = Integer . parseInt ( st . nextToken ( ) ) ; int newSkillScore = skillScore * k / 100 ; if ( newSkillScore < 100 ) continue ; skills . put ( skillName , newSkillScore ) ; } for ( int i = 0 ; i < m ; i ++ ) { String skillName = br . readLine ( ) ; if ( skills . containsKey ( skillName ) ) continue ; skills . put ( skillName , 0 ) ; } pw . println ( skills . size ( ) ) ; for ( Map . Entry < String , Integer > skill : skills . entrySet ( ) ) pw . println ( skill . getKey ( ) + " ▁ " + skill . getValue ( ) ) ; pw . flush ( ) ; pw . close ( ) ; }
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