# 订正完毕啦！！！
#### 以下是源代码
------------
```cpp
#include<bits/stdc++.h>
using namespace std;
const int N = 1000010;
int h[N], v[N], ans[N], mx;
stack<int> s;
int main()
{
int n;
cin >> n;
for (int i = 1; i <= n; i++) cin >> h[i] >> v[i];
for (int i = 1; i <= n; i++)
{
while (!s.empty() && h[s.top()] < h[i])
{
ans[i] += v[s.top()];
s.pop();
}
if (!s.empty()) ans[s.top()] += v[i]; //之前少了这一句判断
s.push(i);
}
for (int i = 1; i <= n; i++) mx = max(mx, ans[i]);
cout << mx << endl;
}
```
by aqfong @ 2018-09-26 22:56:41