Climbing Stairs
Difficulty: EasyTopic: MathDynamic ProgrammingMemoizationLeetcode:70.Climbing StairsYou are climbing a staircase. It takes n steps to reach the top.
Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top?
Example 1:
Input: n = 2
Output: 2
Explanation: There are two ways to climb to the top.
1. 1 step + 1 step
2. 2 steps
Example 2:
Input: n = 3
Output: 3
Explanation: There are three ways to climb to the top.
1. 1 step + 1 step + 1 step
2. 1 step + 2 steps
3. 2 steps + 1 step
Constraints:
1 <= n <= 45
Solution
write solution in here
/**
* @param {number} n
* @return {number}
*/
var climbStairs = function (n) {
const dp = new Array(n).fill(0)
dp[0] = 1
dp[1] = 1
for (let i = 2; i <= n; i++) {
dp[i] = dp[i - 1] + dp[i - 2]
}
return dp[n]
};