【CF527C】Glass Carving

題面

洛谷

題解

因為橫著切與縱切無關
所以開\(set\)維護橫著的最大值和縱著的最大值即可

#include <iostream> 
#include <cstdio> 
#include <cstdlib> 
#include <cstring> 
#include <cmath> 
#include <algorithm>
#include <set> 
using namespace std; 
inline int gi() {
    register int data = 0, w = 1;
    register char ch = 0;
    while (!isdigit(ch) && ch != '-') ch = getchar(); 
    if (ch == '-') w = -1, ch = getchar();
    while (isdigit(ch)) data = 10 * data + ch - '0', ch = getchar(); 
    return w * data; 
}
typedef long long ll; 
int W, H, N; 
set<ll> cx, cy;
multiset<ll> x, y;
multiset<ll> :: iterator ite;

int main() {
    W = gi(), H = gi(), N = gi();
    x.insert(W), y.insert(H);
    cx.insert(0), cx.insert(W);
    cy.insert(0), cy.insert(H);
    for (int i = 1; i <= N; i++) {
        char ch[5]; scanf("%s", ch);
        int t = gi();
        if (ch[0] == 'H') {
            cy.insert(t); ite = cy.find(t); --ite;
            ll l = *ite; ++ite; ++ite;
            ll r = *ite;
            ite = y.find(r - l);
            y.erase(ite); y.insert(r - t); y.insert(t - l);
        }
        else {
            cx.insert(t); ite = cx.find(t); --ite;
            ll l = *ite; ++ite; ++ite;
            ll r = *ite;
            ite = x.find(r - l);
            x.erase(ite); x.insert(r - t); x.insert(t - l);
        }
        ite = x.end(); --ite;
        ll l = *ite;
        ite = y.end(); --ite;
        printf("%I64d\n", l * (*ite));
    }
    return 0;
}