import java.util.*;
public class Solution {
/**
* 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可
*
*
* @param cost int整型一维数组
* @return int整型
*/
public int minCostClimbingStairs (int[] cost) {
// write code here
int[] lestCost = new int[cost.length];
lestCost[cost.length - 1] = cost[cost.length - 1];
lestCost[cost.length - 2] = cost[cost.length - 2];
for(int i = cost.length - 3; i>= 0; i--){
int minCost = lestCost[i+1];
if(minCost > lestCost[i+2]){
minCost = lestCost[i+2];
}
lestCost[i] = cost[i] + minCost;
}
int minCost = lestCost[0];
if(minCost > lestCost[1]){
minCost = lestCost[1];
}
return minCost;
}
}
我是觉得从后面往前开始想比较简单一点。