30 lines
591 B
Rust
30 lines
591 B
Rust
/*
|
|
* File: climbing_stairs_dfs.rs
|
|
* Created Time: 2023-07-09
|
|
* Author: codingonion (coderonion@gmail.com)
|
|
*/
|
|
|
|
/* Search */
|
|
fn dfs(i: usize) -> i32 {
|
|
// Known dp[1] and dp[2], return them
|
|
if i == 1 || i == 2 {
|
|
return i as i32;
|
|
}
|
|
// dp[i] = dp[i-1] + dp[i-2]
|
|
let count = dfs(i - 1) + dfs(i - 2);
|
|
count
|
|
}
|
|
|
|
/* Climbing stairs: Search */
|
|
fn climbing_stairs_dfs(n: usize) -> i32 {
|
|
dfs(n)
|
|
}
|
|
|
|
/* Driver Code */
|
|
pub fn main() {
|
|
let n: usize = 9;
|
|
|
|
let res = climbing_stairs_dfs(n);
|
|
println!("Climb {n} steps, there are {res} solutions in total");
|
|
}
|