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fn main() {
    println!("Hello, world!");
    let tests = [
        (vec![100,4,200,1,3,2], 4),
        (vec![0,3,7,2,5,8,4,6,0,1], 9)
    ];

    for test in tests {
        println!("{:?} is {} should be {}", test.0, Solution::longest_consecutive(test.0.clone()), test.1);
    }
}


struct Solution;

impl Solution {
    pub fn longest_consecutive(nums: Vec<i32>) -> i32 {
        let mut s = nums.clone();
        s.sort();
        s.dedup();
        let mut longest = (nums.len() > 0) as i32;
        let mut longest_old = 0;

        for i in s.windows(2) {
            if &i[1] != &(&i[0] + 1) {
                if longest > longest_old {
                    longest_old = longest;
                }
                longest = 1;
                continue;
            }
            longest += 1;
        }

        longest.max(longest_old)
    }
}