Axis-Parallel Rectangle

 1 #include <bits/stdc++.h>
 2 using namespace std;
 3 #define MOD 998244353
 4 #define INF 0x3f3f3f3f3f3f3f3f
 5 #define LL long long
 6 #define MX 55
 7 struct Node
 8 {
 9     LL x, y;
10     bool operator < (const Node &b)const{
11         return x<b.x;
12     }
13 }pt[MX];
14 
15 int k, n;
16 
17 int main()
18 {
19     scanf("%d%d",&n,&k);
20     for (int i=1;i<=n;i++)
21         scanf("%lld%lld",&pt[i].x, &pt[i].y);
22     sort(pt+1,pt+1+n);
23     LL area = INF;
24     for (int i=1;i<=n;i++)
25     {
26         for (int j=i+1;j<=n;j++)
27         {
28             LL miny = min(pt[i].y, pt[j].y);
29             LL maxy = max(pt[i].y, pt[j].y);
30             for (int q=1;q<=n;q++)
31             {
32                 if (pt[q].y>maxy||pt[q].y<miny) continue;
33                 int tot = 0;
34                 for (int z=q;z<=n;z++)
35                 {
36                     if (pt[z].y>maxy||pt[z].y<miny) continue;
37                     tot++;
38                     if (tot>=k)
39                         area = min(area, (maxy-miny)*(pt[z].x-pt[q].x));
40                 }
41             }
42         }
43     }
44     printf("%lld\n",area);
45     return 0;
46 }