动态规划
爬楼梯
class Solution {
public int climbStairs(int n) {
int[] dp = new int[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];
}
}
大约 2 分钟