public static void main ( String [ ] args ) throws IOException {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) , m = sc . nextInt ( ) ;
  int inf = Integer . MAX_VALUE / 2 - 10 ;
  int [ ] [ ] dist = new int [ n + 1 ] [ n + 1 ] ;
  for ( int i = 0 ;
  i <= n ;
  i ++ ) Arrays . fill ( dist [ i ] , inf ) ;
  for ( int i = 0 ;
  i <= n ;
  i ++ ) dist [ i ] [ i ] = 0 ;
  Edge [ ] dic = new Edge [ m ] ;
  for ( int i = 0 ;
  i < m ;
  i ++ ) {
    int a = sc . nextInt ( ) , b = sc . nextInt ( ) , c = sc . nextInt ( ) ;
    dic [ i ] = new Edge ( a , b , c ) ;
    dist [ a ] [ b ] = Math . min ( dist [ a ] [ b ] , c ) ;
    dist [ b ] [ a ] = Math . min ( dist [ b ] [ a ] , c ) ;
  }
  for ( int mid = 1 ;
  mid <= n ;
  mid ++ ) {
    for ( int i = 1 ;
    i <= n ;
    i ++ ) {
      for ( int j = 1 ;
      j <= n ;
      j ++ ) dist [ i ] [ j ] = Math . min ( dist [ i ] [ j ] , dist [ i ] [ mid ] + dist [ mid ] [ j ] ) ;
    }
  }
  int ans = 0 ;
  for ( Edge e : dic ) {
    if ( dist [ e . left ] [ e . right ] < e . length ) ans ++ ;
  }
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) throws IOException { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) , m = sc . nextInt ( ) ; int inf = Integer . MAX_VALUE / 2 - 10 ; int [ ] [ ] dist = new int [ n + 1 ] [ n + 1 ] ; for ( int i = 0 ; i <= n ; i ++ ) Arrays . fill ( dist [ i ] , inf ) ; for ( int i = 0 ; i <= n ; i ++ ) dist [ i ] [ i ] = 0 ; Edge [ ] dic = new Edge [ m ] ; for ( int i = 0 ; i < m ; i ++ ) { int a = sc . nextInt ( ) , b = sc . nextInt ( ) , c = sc . nextInt ( ) ; dic [ i ] = new Edge ( a , b , c ) ; dist [ a ] [ b ] = Math . min ( dist [ a ] [ b ] , c ) ; dist [ b ] [ a ] = Math . min ( dist [ b ] [ a ] , c ) ; } for ( int mid = 1 ; mid <= n ; mid ++ ) { for ( int i = 1 ; i <= n ; i ++ ) { for ( int j = 1 ; j <= n ; j ++ ) dist [ i ] [ j ] = Math . min ( dist [ i ] [ j ] , dist [ i ] [ mid ] + dist [ mid ] [ j ] ) ; } } int ans = 0 ; for ( Edge e : dic ) { if ( dist [ e . left ] [ e . right ] < e . length ) ans ++ ; } System . out . println ( ans ) ; }
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