There are N children standing in a line. Each child is assigned a rating value.
You are giving candies to these children subjected to the following requirements:
Each child must have at least one candy.
Children with a higher rating get more candies than their neighbors.
What is the minimum candies you must give?
详见：https://leetcode.com/problems/candy/description/
class Solution {
public:
int candy(vector<int>& ratings) {
int candy=0;
int n=ratings.size();
vector<int> dp(n,1);
for(int i=1;i<n;++i)
{
if(ratings[i]>ratings[i-1])
{
dp[i]=dp[i-1]+1;
}
}
for(int i=n-2;i>=0;--i)
{
if(ratings[i]>ratings[i+1])
{
dp[i]=max(dp[i],dp[i+1]+1);
}
}
for(int val:dp)
{
candy+=val;
}
return candy;
}
};
参考：https://www.cnblogs.com/grandyang/p/4575026.html