Codeforces 527C Glass Carving(Set)

意甲冠军片w*h玻璃其n斯普利特倍各事业部为垂直或水平每个分割窗格区域的最大输出

用两个set存储每次分割的位置就能够比較方便的把每次分割产生和消失的长宽存下来每次分割后剩下的最大长宽的积就是答案了

#include <bits/stdc++.h>
using namespace std;
const int N = 200005;
typedef long long LL;
set<int>::iterator i, j;
set<int> ve, ho;  //记录全部边的位置
int wi[N], hi[N];  //记录存在的边长值

void cut(set<int> &s, int *a, int p)
{
    s.insert(p), i = j = s.find(p);
    --i, ++j, --a[*j - *i];  //除掉被分开的长宽
    ++a[p - *i], ++a[*j - p];  //新产生了两个长宽
}

int main()
{
    int w, n, h, p, mw, mh;
    char s[10];
    while(~scanf("%d%d%d", &w, &h, &n))
    {
        memset(wi, 0, sizeof(wi)), memset(hi, 0, sizeof(hi));
        ve.clear(), ho.clear();
        ve.insert(0), ho.insert(0);
        ve.insert(w), ho.insert(h);
        wi[w] = hi[h] = 1;
        mw = w , mh = h;
        while(n--)
        {
            scanf("%s%d", s, &p);
            if(s[0] == 'V') cut(ve, wi, p);
            else cut(ho, hi, p);
            while(!wi[mw]) --mw;
            while(!hi[mh]) --mh;
            printf("%lld
", LL(mw)*LL(mh));
        }
    }
    return 0;
}

Leonid wants to become a glass carver (the person who creates beautiful artworks by cutting the glass). He already has a rectangular wmm × h mm sheet of glass, a diamond glass cutter and lots of enthusiasm. What he lacks is understanding of what to carve and how.

In order not to waste time, he decided to practice the technique of carving. To do this, he makes vertical and horizontal cuts through the entire sheet. This process results in making smaller rectangular fragments of glass. Leonid does not move the newly made glass fragments. In particular, a cut divides each fragment of glass that it goes through into smaller fragments.

After each cut Leonid tries to determine what area the largest of the currently available glass fragments has. Since there appear more and more fragments, this question takes him more and more time and distracts him from the fascinating process.

Leonid offers to divide the labor — he will cut glass, and you will calculate the area of the maximum fragment after each cut. Do you agree?

Input

The first line contains three integers w, h, n (2 ≤ w, h ≤ 200 000, 1 ≤ n ≤ 200 000).

Next n lines contain the descriptions of the cuts. Each description has the form H y or V x. In the first case Leonid makes the horizontal cut at the distance y millimeters (1 ≤ y ≤ h - 1) from the lower edge of the original sheet of glass. In the second case Leonid makes a vertical cut at distance x (1 ≤ x ≤ w - 1) millimeters from the left edge of the original sheet of glass. It is guaranteed that Leonid won't make two identical cuts.

Output

After each cut print on a single line the area of the maximum available glass fragment in mm2.

Sample test(s)

input
4 3 4
H 2
V 2
V 3
V 1

output
8
4
4
2

input
7 6 5
H 4
V 3
V 5
H 2
V 1

output
28
16
12
6
4

Note

Picture for the first sample test:

$\text{[math]}$ Picture for the second sample test: $\text{[math]}$