30 Day Challenge Day 12 | Leetcode 70. Climbing Stairs
动态规划
Easy
动态规划
class Solution {
public:
int climbStairs(int n) {
if(n == 1) return 1;
vector<int> dp(n+1);
dp[0] = 0;
dp[1] = 1;
dp[2] = 2;
for(int i = 3; i <= n; i++) {
dp[i] = dp[i-1] + dp[i-2];
}
return dp[n];
}
};