```
class Solution {
public:
int candy(vector<int>& ratings) {
int n = ratings.size();
if (n < 1)
{
return 0;
}
int buf[n];
for (int i = 0; i < n; i++)
{
buf[i] = 1;
}
for (int i = 1; i < n; i++)
{
if (ratings[i] > ratings[i-1])
{
buf[i] = buf[i-1] + 1;
}
}
for (int i = n-2; i >= 0; i--)
{
if (ratings[i] > ratings[i+1] && buf[i] <= buf[i+1])
{
buf[i] = buf[i+1] + 1;
}
}
int result = 0;
for (int i = 0; i < n; i++)
{
result += buf[i];
}
return result;
}
};
```