Buggy python submission (verdict: Time Limit Exceeded):
n,k = map(int,input().split())
xy = [list(map(int,input().split())) for _ in range(n)]
ans = float('inf')
for i in range(len(xy)):
    for j in range(i+1,len(xy)):
        x1 = min(xy[i][0],xy[j][0])
        x2 = max(xy[i][0],xy[j][0])
        for m in range(len(xy)):
            for l in range(m+1,len(xy)):
                y1 = min(xy[m][1],xy[l][1])
                y2 = max(xy[m][1],xy[l][1])
                points = 0
                for c in range(len(xy)):
                    x,y = xy[c]
                    if x1<=x<=x2 and y1<=y<=y2:
                        points+=1
                if points>=k:
                    ans = min(ans,(x2-x1)*(y2-y1))

print(ans)

Fixed submission:
n,k = map(int,input().split())
x_y = [list(map(int,input().split())) for _ in range(n)]
x_y = sorted(x_y,key=lambda x:(x[0],x[1]))
ans = float('inf')
for i in range(n-1):
    for j in range(i+1,n):
        if j-i+1<k:
            continue
        dis_x = x_y[j][0]-x_y[i][0]
        y_x = x_y[i:j+1]
        y_x = sorted(y_x,key=lambda x:x[1])
        for l in range(len(y_x)-1):
            for m in range(l+1,len(y_x)):
                if m-l+1<k:
                    continue
                dis_y = y_x[m][1]-y_x[l][1]
                ans = min(ans,dis_x*dis_y)
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,k = map(int,input().split())
xy = [list(map(int,input().split())) for _ in range(n)]
from collections import deque
squares = deque()
for i in range(len(xy)):
    x1 = xy[i][0]
    for j in range(i+1,len(xy)):
        x2 = xy[j][0]
        for m in range(len(xy)):
            y1 = xy[m][1]
            for l in range(m+1,len(xy)):
                y2 = xy[l][1]
                square = (min(x1,x2),max(x1,x2),min(y1,y2),max(y1,y2))
                squares.appendleft(square)
ans = float('inf')
pairs = (-10**9,10**9,-10**9,10**9)
while squares:
    x1,x2,y1,y2 = squares.popleft()
    if x1==x2 or y1==y2:
        continue
    if x2-x1>=pairs[1]-pairs[0] and y2-y1>= pairs[3]-pairs[2]:
        continue
    points = 0
    for x,y in xy:
        if x1<=x<=x2 and y1<=y<=y2:
            points+=1
    if points==k:
        ans = min(ans,(x2-x1)*(y2-y1))
        pairs = (x1,x2,y1,y2)
print(ans)

Fixed submission:
n,k = map(int,input().split())
x_y = [list(map(int,input().split())) for _ in range(n)]
x_y = sorted(x_y,key=lambda x:(x[0],x[1]))
ans = float('inf')
for i in range(n-1):
    for j in range(i+1,n):
        if j-i+1<k:
            continue
        dis_x = x_y[j][0]-x_y[i][0]
        y_x = x_y[i:j+1]
        y_x = sorted(y_x,key=lambda x:x[1])
        for l in range(len(y_x)-1):
            for m in range(l+1,len(y_x)):
                if m-l+1<k:
                    continue
                dis_y = y_x[m][1]-y_x[l][1]
                ans = min(ans,dis_x*dis_y)
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,k = map(int,input().split())
xy = [list(map(int,input().split())) for _ in range(n)]
from collections import deque
squares = deque()
for i in range(len(xy)):
    x1 = xy[i][0]
    for j in range(i+1,len(xy)):
        x2 = xy[j][0]
        for m in range(len(xy)):
            y1 = xy[m][1]
            for l in range(m+1,len(xy)):
                y2 = xy[l][1]
                square = (min(x1,x2),max(x1,x2),min(y1,y2),max(y1,y2))
                squares.appendleft(square)
ans = float('inf')
while squares:
    x1,x2,y1,y2 = squares.popleft()
    if x1==x2 or y1==y2:
        continue
    points = 0
    for x,y in xy:
        if x1<=x<=x2 and y1<=y<=y2:
            points+=1
    if points==k:
        ans = min(ans,(x2-x1)*(y2-y1))
print(ans)

Fixed submission:
n,k = map(int,input().split())
x_y = [list(map(int,input().split())) for _ in range(n)]
x_y = sorted(x_y,key=lambda x:(x[0],x[1]))
ans = float('inf')
for i in range(n-1):
    for j in range(i+1,n):
        if j-i+1<k:
            continue
        dis_x = x_y[j][0]-x_y[i][0]
        y_x = x_y[i:j+1]
        y_x = sorted(y_x,key=lambda x:x[1])
        for l in range(len(y_x)-1):
            for m in range(l+1,len(y_x)):
                if m-l+1<k:
                    continue
                dis_y = y_x[m][1]-y_x[l][1]
                ans = min(ans,dis_x*dis_y)
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,k = map(int,input().split())
xy = [list(map(int,input().split())) for _ in range(n)]
from collections import deque
squares = deque()
for i in range(len(xy)):
    x1 = xy[i][0]
    for j in range(i+1,len(xy)):
        x2 = xy[j][0]
        for m in range(len(xy)):
            y1 = xy[m][1]
            for l in range(m+1,len(xy)):
                y2 = xy[l][1]
                square = (min(x1,x2),max(x1,x2),min(y1,y2),max(y1,y2))
                squares.appendleft(square)
ans = float('inf')
while squares:
    x1,x2,y1,y2 = squares.popleft()
    if x1==x2 or y1==y2:
        continue
    points = 0
    for x,y in xy:
        if x1<=x<=x2 and y1<=y<=y2:
            points+=1
    if points==k:
        ans = min(ans,(x2-x1)*(y2-y1))
print(ans)

Fixed submission:
n,k = map(int,input().split())
x_y = [list(map(int,input().split())) for _ in range(n)]
x_y = sorted(x_y,key=lambda x:(x[0],x[1]))
ans = float('inf')
for i in range(n-1):
    for j in range(i+1,n):
        if j-i+1<k:
            continue
        dis_x = x_y[j][0]-x_y[i][0]
        y_x = x_y[i:j+1]
        y_x = sorted(y_x,key=lambda x:x[1])
        for l in range(len(y_x)-1):
            for m in range(l+1,len(y_x)):
                if m-l+1<k:
                    continue
                dis_y = y_x[m][1]-y_x[l][1]
                ans = min(ans,dis_x*dis_y)
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,k = map(int,input().split())
xy = [list(map(int,input().split())) for _ in range(n)]
squares = []
for i in range(len(xy)):
    x1 = xy[i][0]
    for j in range(i+1,len(xy)):
        x2 = xy[j][0]
        for m in range(len(xy)):
            y1 = xy[m][1]
            for l in range(m+1,len(xy)):
                y2 = xy[l][1]
                square = (min(x1,x2),max(x1,x2),min(y1,y2),max(y1,y2))
                squares.append(square)
ans = float('inf')
for x1,x2,y1,y2 in squares:
    if x1==x2 or y1==y2:
        continue
    points = 0
    for x,y in xy:
        if x1<=x<=x2 and y1<=y<=y2:
            points+=1
    if points==k:
        ans = min(ans,(x2-x1)*(y2-y1))
print(ans)

Fixed submission:
n,k = map(int,input().split())
x_y = [list(map(int,input().split())) for _ in range(n)]
x_y = sorted(x_y,key=lambda x:(x[0],x[1]))
ans = float('inf')
for i in range(n-1):
    for j in range(i+1,n):
        if j-i+1<k:
            continue
        dis_x = x_y[j][0]-x_y[i][0]
        y_x = x_y[i:j+1]
        y_x = sorted(y_x,key=lambda x:x[1])
        for l in range(len(y_x)-1):
            for m in range(l+1,len(y_x)):
                if m-l+1<k:
                    continue
                dis_y = y_x[m][1]-y_x[l][1]
                ans = min(ans,dis_x*dis_y)
print(ans)