HDU 5762 Teacher Bo （水题）
时间：2019-11-26 09:38:01
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[导读]题目链接：HDU 5762
题面：
Teacher Bo
Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 131072/131072
题目链接：HDU 5762
题面：
Teacher Bo Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 644 Accepted Submission(s): 353
Problem Description Teacher BoBo is a geography teacher in the school.One day in his class,he marked N points in the map,the i-th point is at (Xi,Yi).He wonders,whether there is a tetrad (A,B,C,D)(A
If there exists such tetrad,print "YES",else print "NO".
Input First line, an integer T. There are T test cases.(T≤50)
In each test case,the first line contains two intergers, N, M, means the number of points and the range of the coordinates.(N,M≤105).
Next N lines, the i-th line shows the coordinate of the i-th point.(Xi,Yi)(0≤Xi,Yi≤M).
Output T lines, each line is "YES" or "NO".
Sample Input 2 3 10 1 1 2 2 3 3 4 10 8 8 2 3 3 3 4 4
Sample Output YES NO
Source 2016 Multi-University Training Contest 3
题意：
问给定的点中，是否存在两对点的曼哈顿距离完全相同，两对点不可以是同一对点。
解题：
其实这题考察的就是暴力，只要抓住差值范围是在0-2*10^5范围内这一点就可以解决。看似n^2遍历，实则最多只会在2*10^5时停下来，用vis数组标记一下即可，如果出现点访问两次即有。
代码：
#include
#include
#include
#include
#include
#include
#define LL long long
using namespace std;
bool vis[200005];
int x[100005],y[100005];
int main()
{
int t,n,m,tmp;
bool flag=0;
scanf("%d",&t);
while(t--)
{
flag=0;
scanf("%d%d",&n,&m);
memset(vis,0,sizeof(vis));
for(int i=0;i 
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