public static void main ( String [ ] args ) {
  Scanner in = new Scanner ( System . in ) ;
  int n = in . nextInt ( ) ;
  int m = in . nextInt ( ) ;
  int [ ] a = new int [ m ] ;
  int [ ] b = new int [ m ] ;
  int [ ] c = new int [ m ] ;
  int [ ] [ ] cost = new int [ n ] [ n ] ;
  int inf = 1 << 29 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) Arrays . fill ( cost [ i ] , inf ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) cost [ i ] [ i ] = 0 ;
  for ( int i = 0 ;
  i < m ;
  i ++ ) {
    a [ i ] = in . nextInt ( ) - 1 ;
    b [ i ] = in . nextInt ( ) - 1 ;
    c [ i ] = in . nextInt ( ) ;
    cost [ a [ i ] ] [ b [ i ] ] = c [ i ] ;
    cost [ b [ i ] ] [ a [ i ] ] = c [ i ] ;
  }
  boolean used [ ] = new boolean [ m ] ;
  for ( int k = 0 ;
  k < n ;
  k ++ ) {
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      for ( int j = 0 ;
      j < n ;
      j ++ ) {
        if ( i == j ) continue ;
        cost [ i ] [ j ] = Math . min ( cost [ i ] [ k ] + cost [ k ] [ j ] , cost [ i ] [ j ] ) ;
      }
    }
  }
  int ans = 0 ;
  for ( int i = 0 ;
  i < m ;
  i ++ ) if ( c [ i ] > cost [ a [ i ] ] [ b [ i ] ] ) ans ++ ;
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { Scanner in = new Scanner ( System . in ) ; int n = in . nextInt ( ) ; int m = in . nextInt ( ) ; int [ ] a = new int [ m ] ; int [ ] b = new int [ m ] ; int [ ] c = new int [ m ] ; int [ ] [ ] cost = new int [ n ] [ n ] ; int inf = 1 << 29 ; for ( int i = 0 ; i < n ; i ++ ) Arrays . fill ( cost [ i ] , inf ) ; for ( int i = 0 ; i < n ; i ++ ) cost [ i ] [ i ] = 0 ; for ( int i = 0 ; i < m ; i ++ ) { a [ i ] = in . nextInt ( ) - 1 ; b [ i ] = in . nextInt ( ) - 1 ; c [ i ] = in . nextInt ( ) ; cost [ a [ i ] ] [ b [ i ] ] = c [ i ] ; cost [ b [ i ] ] [ a [ i ] ] = c [ i ] ; } boolean used [ ] = new boolean [ m ] ; for ( int k = 0 ; k < n ; k ++ ) { for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < n ; j ++ ) { if ( i == j ) continue ; cost [ i ] [ j ] = Math . min ( cost [ i ] [ k ] + cost [ k ] [ j ] , cost [ i ] [ j ] ) ; } } } int ans = 0 ; for ( int i = 0 ; i < m ; i ++ ) if ( c [ i ] > cost [ a [ i ] ] [ b [ i ] ] ) ans ++ ; System . out . println ( ans ) ; }
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