Buggy python submission (verdict: Runtime Error):
import copy
N,M=map(int,input().split())

A = [[int(i)-1 for i in input().split()] for i in range(M)]
#print(A)
def dfs(x):
  if visited[x]:
    return
  visited[x]=True
  for i in range(N):
    if edgemat[x][i]:
      dfs(i)
answer=0

for i in range(M):
  visited=[False]*N
  Acopy=copy.deepcopy(A)
  del Acopy[i]
  edgemat=[[0] *N for j in range(N)]
  for m,n in Acopy:
    edgemat[m][n]=1
    edgemat[n][m]=1
  dfs(0)
  if any(visited[y] == False for y in range(N)):
    answer+=1
print(answer)

Fixed submission:
#https://atcoder.jp/contests/abc075/submissions/2242350
N,K=map(int,input().split())

points=[tuple(map(int,input().split())) for i in range(N)]
answer=10**19
sortx=sorted(points)
numberx = list(enumerate(sortx))

#n-k+1以降を左の頂点とすると点の数が明らかに足りない
for left,(x1,y1) in numberx[:N-K+1]:
  #left+K-1以降を右の頂点にしないと間に足りる点の数が入ってない
  for right,(x2,y2) in numberx[left+K-1:]:
    dx=x2-x1
    #left-rightの間でyについてsort
    sorty=sorted(y for x,y in sortx[left:right+1])
    #K個点を入れた状態で面積を求める
    for y3,y4 in zip(sorty,sorty[K-1:]):
      if y3<=y1 and y3<=y2 and y4>=y1 and y4>=y2:
        answer=min(answer,dx*(y4-y3))
         
print(answer)

Buggy python submission (verdict: Time Limit Exceeded):
N,K=map(int,input().split())

point=[]
answer=10**19
for i in range(N):
  point.append(list(map(int,input().split())))
sorted(point)
for left in range(N):
  for right in range(N):
    dx=point[right][0]-point[left][0]
    for ceil in range(N):
      for bottom in range(N):
        if point[bottom][1] > point[ceil][1]:
          continue
        count=0
        for i in range(N):
          x=point[i][0]
          y=point[i][1]
          if point[left][0]<=x and x<=point[right][0] and point[bottom][1]<=y and y<=point[ceil][1]:
            count+=1
        if count>=K:
          answer=min(answer,dx*(point[ceil][1]-point[bottom][1]))
     
          
print(answer)

Fixed submission:
#https://atcoder.jp/contests/abc075/submissions/2242350
N,K=map(int,input().split())

points=[tuple(map(int,input().split())) for i in range(N)]
answer=10**19
sortx=sorted(points)
numberx = list(enumerate(sortx))

#n-k+1以降を左の頂点とすると点の数が明らかに足りない
for left,(x1,y1) in numberx[:N-K+1]:
  #left+K-1以降を右の頂点にしないと間に足りる点の数が入ってない
  for right,(x2,y2) in numberx[left+K-1:]:
    dx=x2-x1
    #left-rightの間でyについてsort
    sorty=sorted(y for x,y in sortx[left:right+1])
    #K個点を入れた状態で面積を求める
    for y3,y4 in zip(sorty,sorty[K-1:]):
      if y3<=y1 and y3<=y2 and y4>=y1 and y4>=y2:
        answer=min(answer,dx*(y4-y3))
         
print(answer)

Buggy python submission (verdict: Time Limit Exceeded):
N,K=map(int,input().split())

point=[]
answer=10**19
for i in range(N):
  point.append(list(map(int,input().split())))
  
for left in range(N):
  for right in range(N):
    if point[right][0]<point[left][0]:
      continue
    for ceil in range(N):
      for bottom in range(N):
        if point[bottom][1] > point[ceil][1]:
          continue
        count=0
        for i in range(N):
          x=point[i][0]
          y=point[i][1]
          if point[left][0]<=x and x<=point[right][0] and point[bottom][1]<=y and y<=point[ceil][1]:
            count+=1
        if count>=K:
          answer=min(answer,(point[right][0]-point[left][0])*(point[ceil][1]-point[bottom][1]))
     
          
print(answer)

Fixed submission:
#https://atcoder.jp/contests/abc075/submissions/2242350
N,K=map(int,input().split())

points=[tuple(map(int,input().split())) for i in range(N)]
answer=10**19
sortx=sorted(points)
numberx = list(enumerate(sortx))

#n-k+1以降を左の頂点とすると点の数が明らかに足りない
for left,(x1,y1) in numberx[:N-K+1]:
  #left+K-1以降を右の頂点にしないと間に足りる点の数が入ってない
  for right,(x2,y2) in numberx[left+K-1:]:
    dx=x2-x1
    #left-rightの間でyについてsort
    sorty=sorted(y for x,y in sortx[left:right+1])
    #K個点を入れた状態で面積を求める
    for y3,y4 in zip(sorty,sorty[K-1:]):
      if y3<=y1 and y3<=y2 and y4>=y1 and y4>=y2:
        answer=min(answer,dx*(y4-y3))
         
print(answer)