static long LCM ( int n ) {
  long lcm = 1 ;
  for ( int i = 0 ;
  i < primes . size ( ) && primes . get ( i ) <= n ;
  i ++ ) {
    int pp = primes . get ( i ) ;
    while ( pp * primes . get ( i ) <= n ) pp = pp * primes . get ( i ) ;
    lcm *= pp ;
    lcm %= 1000000007 ;
  }
  return lcm ;
}

static long LCM ( int n ) { long lcm = 1 ; for ( int i = 0 ; i < primes . size ( ) && primes . get ( i ) <= n ; i ++ ) { int pp = primes . get ( i ) ; while ( pp * primes . get ( i ) <= n ) pp = pp * primes . get ( i ) ; lcm *= pp ; lcm %= 1000000007 ; } return lcm ; }
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