static int get ( int x , int y , int z ) {
  if ( x > z ) return - 1 ;
  int val = z - x ;
  int div = ( z - x ) / y ;
  int ans = div * y + x ;
  return ans ;
}

static int get ( int x , int y , int z ) { if ( x > z ) return - 1 ; int val = z - x ; int div = ( z - x ) / y ; int ans = div * y + x ; return ans ; }
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