diff options
Diffstat (limited to 'other/unique_num_occurrences.rs')
-rw-r--r-- | other/unique_num_occurrences.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/other/unique_num_occurrences.rs b/other/unique_num_occurrences.rs new file mode 100644 index 0000000..d29c580 --- /dev/null +++ b/other/unique_num_occurrences.rs @@ -0,0 +1,20 @@ +struct Solution; + +impl Solution { + pub fn unique_occurrences(arr: Vec<i32>) -> bool { + let (mut counter, mut set) = ([0; 2001], [false; 1000]); + arr.iter().for_each(|&x| counter[(x + 1000) as usize] += 1); + for &x in counter.iter().filter(|&&x| x > 0) { + match set[x as usize] { + true => return false, + false => set[x as usize] = true + } + } + true + } +} + +fn main() { + let arr = vec![1,2,2,1,1,3]; + print!("{}", Solution::unique_occurrences(arr)); +} |