用 Rust 刷 leetcode 第一題

problem

Example

Solution

use std::collections::HashMap;
impl Solution {
    pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
        let mut mm: HashMap<i32, i32> = HashMap::new();
        for (i, v) in nums.iter().enumerate() {
            match mm.get(&(target-v)) {
                Some(&index) => { return vec![index, i as i32]; }
                None => { mm.entry(*v).or_insert(i as i32); }
            }
        }
        vec![]
    }
}