You are climbing a stair case. It takes n steps to reach to the top.
Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top?
经典动态规划的问题,如果到最后一个的话,有从倒数第一节和倒数第二节,两种走到的放法。
public class Solution{
public int climbStairs(
int n){
if(n == 0 || n == 1 || n ==2
){
return n;
}
int[] steps =
new int[n+1
];
steps[0] = 0
;
steps[1] = 1
;
steps[2] = 2
;
for(
int i = 3; i <= n ; i++
){
steps[i] = steps[i-1] + steps[i-2
];
}
return steps[n];
}
}
转载于:https://www.cnblogs.com/hewx/p/4532427.html