#[test]
fn test1() {
  assert_eq!(number(&[(10,0),(3,5),(5,8)]), 5);
}
#[test]
fn test2() {
  assert_eq!(number(&[(3,0),(9,1),(4,10),(12,2),(6,1),(7,10)]), 17);
}
#[test]
fn test3() {
  assert_eq!(number(&[(3,0),(9,1),(4,8),(12,2),(6,1),(7,8)]), 21);
}
#[test]
fn test4() {
  assert_eq!(number(&[(1,1),(1,1),(4,4),(12,12),(6,6),(8,8)]), 0);
}
#[test]
fn test5() {
  assert_eq!(number(&[(2,1),(2,1),(2,1),(2,1),(2,1),(2,1)]), 6);
}