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# Climbing Stairs LeetCode Solution – Queslers

## Problem – Climbing Stairs LeetCode Solution

You 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`

### Climbing Stairs LeetCode Solution in C++

``````int climbStairs(int n) {
int a = 1, b = 1;
while (n--)
a = (b += a) - a;
return a;
}
``````

### Climbing Stairs LeetCode Solution in Java

``````public int climbStairs(int n) {
int a = 1, b = 1;
while (n-- > 0)
a = (b += a) - a;
return a;
}
``````

### Climbing Stairs LeetCode Solution in Python

``````def climbStairs(self, n):
a = b = 1
for _ in range(n):
a, b = b, a + b
return a
``````
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