[枚举] HDU 2019 Multi-University Training Contest 8 - Calabash and Landlord

Calabash and Landlord

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)
Total Submission(s): 3228    Accepted Submission(s): 613

Problem Description

Calabash is the servant of a landlord. The landlord owns a piece of land, which can be regarded as an infinite 2D plane.

One
day the landlord set up two orthogonal rectangular-shaped fences on his
land. He asked Calabash a simple problem: how many nonempty connected
components is my land divided into by these two fences, both finite and
infinite? Calabash couldn't answer this simple question. Please help
him!

Recall that a connected component is a maximal set of
points not occupied by the fences, and every two points in the set are
reachable without crossing the fence.

 

Input

The first line of input consists of a single integer T (1≤T≤10000), the number of test cases.

Each test case contains two lines, specifying the two rectangles. Each line contains four integers x1,y1,x2,y2 (0≤x1,y1,x2,y2≤109,x1<x2,y1<y2), where (x1,y1),(x2,y2)
are the Cartesian coordinates of two opposite vertices of the
rectangular fence. The edges of the rectangles are parallel to the
coordinate axes. The edges of the two rectangles may intersect, overlap,
or even coincide.

 

Output

For each test case, print the answer as an integer in one line.

 

Sample Input

3
0 0 1 1
2 2 3 4
1 0 3 2
0 1 2 3
0 0 1 1
0 0 1 1

 

Sample Output

3
4
2

 

题意:给你2个栅栏的坐标,栅栏会分割平面,问栅栏分割平面后有多少个连通块

思路:枚举所有情况,时间复杂度O(1),代码复杂度O(∞),一开始WA到自闭,就开始暴力模式,写的时候懵了,出现了一些难以发现的小错误,差点翻车,最后15分钟才改出来,

所有情况都在代码里了,可以看一下代码,这里就不细讲了

 #include<bits/stdc++.h>
 using namespace std;
 int x_1[],y_1[],x_2[],y_2[];
 int main(){
     int t,a,b;
     ios::sync_with_stdio();
     cin>>t;
     while(t--){
         for(int i=;i<=;i++)cin>>x_1[i]>>y_1[i]>>x_2[i]>>y_2[i];
         a=,b=;
         if(x_1[]>x_1[])a^=,b^=;
         if(x_1[]==x_1[]){
             if(x_2[b]>x_2[a]||y_2[b]>y_2[a]||y_1[b]<y_1[a])a^=,b^=;
         }
         if(x_1[a]==x_1[b]&&x_2[a]==x_2[b]&&y_1[a]==y_1[b]&&y_2[a]==y_2[b]){
             cout<<<<endl;
         }
         else{
             if(x_2[a]<=x_1[b]){
                 cout<<<<endl;
             }
             else{
                 if(y_2[a]<=y_1[b]||y_1[a]>=y_2[b]){
                     cout<<<<endl;
                 }
                 else{
                         if(x_1[a]==x_1[b]){     ///l1
                             if(x_2[a]==x_2[b]){ ///r1
                                 if(y_1[a]==y_1[b]){ ///d1
                                     if(y_2[a]==y_2[b])  ///u1
                                         cout<<<<endl;
                                     else
                                         cout<<<<endl;
                                 }
                                 else{               ///d0
                                     if(y_2[a]==y_2[b])  ///u1
                                         cout<<<<endl;
                                     else            ///u0
                                         cout<<<<endl;
                                 }
                             }
                             else if(x_2[b]>x_2[a]){ ///l1 r0
                                 if(y_1[a]==y_1[b]){ ///d1
                                     if(y_2[a]==y_2[b]||y_2[a]<y_2[b])
                                         cout<<<<endl;
                                     else if(y_2[a]>y_2[b])
                                         cout<<<<endl;
                                 }
                                 else{   ///d0
                                         if(y_1[a]<y_1[b]){
                                             if(y_2[a]==y_2[b])cout<<<<endl;
                                             else if(y_2[a]>y_2[b]) cout<<<<endl;
                                             else cout<<<<endl;
                                         }
                                         else{
                                             if(y_2[a]==y_2[b])cout<<<<endl;
                                             else if(y_2[a]>y_2[b]) cout<<<<endl;
                                             else cout<<<<endl;
                                         }
                                 }
                             }
                             else{
                                 if(y_1[a]==y_1[b]){ ///d1
                                     if(y_2[a]==y_2[b]||y_2[a]>y_2[b])
                                         cout<<<<endl;
                                     else if(y_2[a]<y_2[b])
                                         cout<<<<endl;
                                 }
                                 else{   ///d0
                                         if(y_1[a]>y_1[b]){
                                             if(y_2[a]==y_2[b])cout<<<<endl;
                                             else if(y_2[a]>y_2[b]) cout<<<<endl;
                                             else cout<<<<endl;
                                         }
                                         else{
                                             if(y_2[a]==y_2[b])cout<<<<endl;
                                             else if(y_2[a]>y_2[b]) cout<<<<endl;
                                             else cout<<<<endl;
                                         }
                                 }
                             }
                         }
                         else{
                             if(x_2[a]==x_2[b]){    ///l0 r1
                                 if(y_1[a]==y_1[b]){
                                     if(y_2[a]==y_2[b])
                                         cout<<<<endl;
                                     else if(y_2[a]>y_2[b])cout<<<<endl;
                                     else cout<<<<endl;
                                 }
                                 else{
                                     if(y_1[a]<y_1[b]){
                                         if(y_2[a]==y_2[b]||y_2[a]>y_2[b])cout<<<<endl;
                                         else cout<<<<endl;
                                     }
                                     else{
                                         if(y_2[a]==y_2[b]||y_2[a]>y_2[b])cout<<<<endl;
                                         else cout<<<<endl;
                                     }
                                 }
                             }
                             else{
                                 if(x_2[a]>x_2[b]){
                                     if(y_1[a]==y_1[b]){
                                         if(y_2[a]==y_2[b])cout<<<<endl;
                                         else if(y_2[a]>y_2[b])cout<<<<endl;
                                         else cout<<<<endl;
                                     }
                                     else{
                                         if(y_1[a]<y_1[b]){
                                             if(y_2[a]==y_2[b]||y_2[a]>y_2[b])cout<<<<endl;
                                             else cout<<<<endl;
                                         }
                                         else{
                                             if(y_2[a]==y_2[b])cout<<<<endl;
                                             else if(y_2[a]>y_2[b])cout<<<<endl;
                                             else cout<<<<endl;
                                         }
                                     }
                                 }
                                 else{
                                     if(y_1[a]==y_1[b]){
                                         cout<<<<endl;
                                     }
                                     else{
                                         if(y_1[a]<y_1[b]){
                                             cout<<<<endl;
                                         }
                                         else{
                                             if(y_2[a]==y_2[b]||y_2[a]>y_2[b])cout<<<<endl;
                                             else cout<<<<endl;
                                         }
                                     }
                                 }
                             }
                         }
                     }
                 }
             }
         }

     }