Educational Codeforces Round 26 C

Two Seals

题意：

思路：模拟（枚举第一个的2种摆法，暴力第二个看是否可以放下，前提是第一个可以放下）

AC代码：

#include "iostream"
#include "iomanip"
#include "string.h"
#include "stack"
#include "queue"
#include "string"
#include "vector"
#include "set"
#include "map"
#include "algorithm"
#include "stdio.h"
#include "math.h"
#pragma comment(linker, "/STACK:102400000,102400000")
#define bug(x) cout<<x<<" "<<"UUUUU"<<endl;
#define mem(a,x) memset(a,x,sizeof(a))
#define step(x) fixed<< setprecision(x)<<
#define mp(x,y) make_pair(x,y)
#define pb(x) push_back(x)
#define ll long long
#define endl ("\n")
#define ft first
#define sd second
#define lrt (rt<<1)
#define rrt (rt<<1|1)
using namespace std;
const long long INF = 1e18+1LL;
const int inf = 1e9+1e8;
const int N=1e5+100;
const ll mod=1e9+7;

int n,a,b,ans,x[105], y[105];
int main(){
    ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
    cin>>n>>a>>b;
    if(a>b) swap(a,b);
    for(int i=1; i<=n; ++i){
        cin>>x[i]>>y[i];
        if(x[i]>y[i]) swap(x[i],y[i]);
    }
    int h1,l1,h2,l2;
    for(int i=1; i<=n; ++i){
        for(int j=i+1; j<=n; ++j){
            if(x[i]<=a && y[i]<=b){
                h1=a-x[i], l1=b; if(h1>l1) swap(h1,l1);
                h2=a, l2=b-y[i]; if(h2>l2) swap(h2,l2);
                if((x[j]<=h1 && y[j]<=l1) || (x[j]<=h2 && y[j]<=l2)){
                    ans=max(ans,x[i]*y[i]+x[j]*y[j]);
                }
            }
            if(x[i]<=b && y[i]<=a){
                h1=a-y[i], l1=b; if(h1>l1) swap(h1,l1);
                h2=a, l2=b-x[i]; if(h2>l2) swap(h2,l2);
                if((x[j]<=h1 && y[j]<=l1) || (x[j]<=h2 && y[j]<=l2)){
                    ans=max(ans,x[i]*y[i]+x[j]*y[j]);
                }
            }
        }
    }
    cout<<ans<<endl;
    return 0;
}