public static void main ( String [ ] args ) {
  Scanner scanner = new Scanner ( System . in ) ;
  int n = scanner . nextInt ( ) ;
  int k = scanner . nextInt ( ) ;
  int [ ] fence = new int [ n ] ;
  int a ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    a = scanner . nextInt ( ) ;
    if ( i == 0 ) fence [ i ] = a ;
    else fence [ i ] = fence [ i - 1 ] + a ;
  }
  int min = fence [ k - 1 ] ;
  int index = 1 ;
  int result ;
  for ( int i = 1 ;
  i < n - k + 1 ;
  i ++ ) {
    result = fence [ i + k - 1 ] - fence [ i - 1 ] ;
    if ( result < min ) {
      min = result ;
      index = i + 1 ;
    }
  }
  System . out . println ( index ) ;
}

public static void main ( String [ ] args ) { Scanner scanner = new Scanner ( System . in ) ; int n = scanner . nextInt ( ) ; int k = scanner . nextInt ( ) ; int [ ] fence = new int [ n ] ; int a ; for ( int i = 0 ; i < n ; i ++ ) { a = scanner . nextInt ( ) ; if ( i == 0 ) fence [ i ] = a ; else fence [ i ] = fence [ i - 1 ] + a ; } int min = fence [ k - 1 ] ; int index = 1 ; int result ; for ( int i = 1 ; i < n - k + 1 ; i ++ ) { result = fence [ i + k - 1 ] - fence [ i - 1 ] ; if ( result < min ) { min = result ; index = i + 1 ; } } System . out . println ( index ) ; }
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