2553. 分割数组中数字的数位

src/main.rs

@@ -1,105 +1,22 @@
 mod arr;
+
 struct Solution {}
-
-use std::cmp::Ordering;
-use std::collections::{BinaryHeap, HashMap};
-
-#[derive(Eq, PartialEq)]
-struct Item(usize, usize); // (键, 值)
-impl Ord for Item {
-    fn cmp(&self, other: &Self) -> Ordering {
-        other.0.cmp(&self.0) // 反序，实现最小堆
-    }
-}
-
-impl PartialOrd for Item {
-    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
-        Some(self.cmp(other))
-    }
-}
-
-static mut IS_PRIME: Vec<Vec<i32>> = vec![];
-
-pub fn get_is_prime() -> fn(i32) -> &'static Vec<i32> {
-    unsafe {
-        #![allow(static_mut_refs)]
-        if IS_PRIME.is_empty() {
-            let n = 1e6 as usize;
-            IS_PRIME = vec![vec![]; n + 1];
-            for i in 2..n + 1 {
-                IS_PRIME[i].push(1);
-                IS_PRIME[i].push(i as i32);
-            }
-            let mut primes = vec![0; n + 1];
-            let mut cnt = 0;
-
-            for i in 2..=n {
-                if IS_PRIME[i].len() == 2
-                //是素数采用来筛
-                {
-                    cnt += 1;
-                    primes[cnt] = i; //加入素数表
-                    for j in (2 * i..=n).step_by(i) {
-                        IS_PRIME[j].push(i as i32);
-                    }
-                }
-            }
-        }
-    }
-
-    // 返回函数指针，访问时再用 unsafe
-    fn check(x: i32) -> &'static Vec<i32> {
-        unsafe { &IS_PRIME[x as usize] }
-    }
-
-    check
-}
-
 impl Solution {
-    pub fn min_jumps(nums: Vec<i32>) -> i32 {
-        let mut arr = vec![1e6 as usize; nums.len()];
-        let mut map = HashMap::<i32, Vec<usize>>::new();
-        let is_prime = get_is_prime();
-        for i in 0..nums.len() {
-            if is_prime(nums[i]).len() == 2 {
-                map.entry(nums[i]).or_insert(vec![]).push(i);
+    pub fn separate_digits(nums: Vec<i32>) -> Vec<i32> {
+        let mut ans = vec![];
+        for x in nums.iter() {
+            let mut y = *x;
+            let mut local_ans = vec![];
+            while y > 0 {
+                local_ans.push(y % 10);
+                y /= 10;
             }
+            local_ans.reverse();
+            ans.extend(local_ans.iter());
         }
-        // key 跳数 val 下标
-        let mut queue = BinaryHeap::new();
-        queue.push(Item(0, nums.len() - 1));
-
-        arr[nums.len() - 1] = 0;
-        while let Some(Item(jump_count, index)) = queue.pop() {
-            if index == 0 {
-                return jump_count as i32;
-            }
-            if index > 0 {
-                if arr[index - 1] > arr[index] + 1 {
-                    queue.push(Item(jump_count + 1, index - 1));
-                    arr[index - 1] = jump_count + 1;
-                }
-            }
-            if index < arr.len() - 1 {
-                if arr[index + 1] > arr[index] + 1 {
-                    queue.push(Item(jump_count + 1, index + 1));
-                    arr[index + 1] = jump_count + 1;
-                }
-            }
-
-            for i in is_prime(nums[index]).iter().skip(1) {
-                for x in map.entry(*i).or_default() {
-                    if arr[*x] > arr[index] + 1 {
-                        queue.push(Item(jump_count + 1, *x));
-                        arr[*x] = jump_count + 1;
-                    }
-                }
-                map.remove_entry(i);
-            }
-        }
-        0
+        ans
     }
 }
 fn main() {
-    println!("{:?}", Solution::min_jumps(vec![5;1e5 as usize]));
+    println!("{:?}", Solution::separate_digits(vec![13, 25, 83, 77]));
 }