static int mirror ( int n ) {
  int temp = n ;
  int sum = 0 ;
  while ( temp > 0 ) {
    int rem = temp % 10 ;
    if ( rem == 2 ) {
      rem = 5 ;
    }
    else if ( rem == 5 ) {
      rem = 2 ;
    }
    sum = sum * 10 + rem ;
    temp /= 10 ;
  }
  return sum ;
}

static int mirror ( int n ) { int temp = n ; int sum = 0 ; while ( temp > 0 ) { int rem = temp % 10 ; if ( rem == 2 ) { rem = 5 ; } else if ( rem == 5 ) { rem = 2 ; } sum = sum * 10 + rem ; temp /= 10 ; } return sum ; }
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