Buggy python submission (verdict: Time Limit Exceeded):
N, K = map(int, input().split())
data = [list(map(int, input().split())) for _ in range(N)]

ans = 10 ** 19
for a in range(N):
    for b in range(a+1, N):
        for c in range(N):
            for d in range(c+1, N):
                x0 = data[a][0]
                x1 = data[b][0]
                y0 = data[c][1]
                y1 = data[d][1]

                if x0 > x1:
                    x0, x1 = x1, x0
                if y0 > y1:
                    y0, y1 = y1, y0

                count = 0
                for i, j in data:
                    if x0 <= i <= x1 and y0 <= j <= y1:
                        count += 1
                if count >= K:
                    ans = min(ans, (x1 - x0)*(y1 - y0))

print(ans)

Fixed submission:
N, K = map(int, input().split())
data = [list(map(int, input().split())) for _ in range(N)]

ans = 10 ** 19
for a in range(N):
    for b in range(a+1, N):
        for c in range(N):
            for d in range(c+1, N):
                x0 = data[a][0]
                x1 = data[b][0]
                y0 = data[c][1]
                y1 = data[d][1]

                if x0 > x1:
                    x0, x1 = x1, x0
                if y0 > y1:
                    y0, y1 = y1, y0

                count = 0
                for i, j in data:
                    if x0 <= i <= x1 and y0 <= j <= y1:
                        count += 1
                if count >= K:
                    ans = min(ans, (x1 - x0)*(y1 - y0))

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
N, K = map(int, input().split())
data = [list(map(int, input().split())) for _ in range(N)]

ans = 10 ** 19
for a in range(N):
    for b in range(N):
        if a != b:
            for c in range(N):
                for d in range(N):
                    if c != d:
                        x0 = data[a][0]
                        x1 = data[b][0]
                        y0 = data[c][1]
                        y1 = data[d][1]

                        count = 0
                        for i, j in data:
                            if x0 <= i <= x1 and y0 <= j <= y1:
                                count += 1
                        if count >= K:
                            ans = min(ans, (x1 - x0)*(y1 - y0))

print(ans)

Fixed submission:
N, K = map(int, input().split())
data = [list(map(int, input().split())) for _ in range(N)]

ans = 10 ** 19
for a in range(N):
    for b in range(a+1, N):
        for c in range(N):
            for d in range(c+1, N):
                x0 = data[a][0]
                x1 = data[b][0]
                y0 = data[c][1]
                y1 = data[d][1]

                if x0 > x1:
                    x0, x1 = x1, x0
                if y0 > y1:
                    y0, y1 = y1, y0

                count = 0
                for i, j in data:
                    if x0 <= i <= x1 and y0 <= j <= y1:
                        count += 1
                if count >= K:
                    ans = min(ans, (x1 - x0)*(y1 - y0))

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
N, K = map(int, input().split())
data = [list(map(int, input().split())) for _ in range(N)]

ans = 10 ** 19
for a in range(N):
    for b in range(N):
        for c in range(N):
            for d in range(N):
                x0 = data[a][0]
                x1 = data[b][0]
                y0 = data[c][1]
                y1 = data[d][1]
                if x0 < x1 and y0 < y1:
                    count = 0
                    for i, j in data:
                        if x0 <= i <= x1 and y0 <= j <= y1:
                            count += 1
                    if count >= K:
                        ans = min(ans, (x1 - x0)*(y1 - y0))

print(ans)

Fixed submission:
N, K = map(int, input().split())
data = [list(map(int, input().split())) for _ in range(N)]

ans = 10 ** 19
for a in range(N):
    for b in range(a+1, N):
        for c in range(N):
            for d in range(c+1, N):
                x0 = data[a][0]
                x1 = data[b][0]
                y0 = data[c][1]
                y1 = data[d][1]

                if x0 > x1:
                    x0, x1 = x1, x0
                if y0 > y1:
                    y0, y1 = y1, y0

                count = 0
                for i, j in data:
                    if x0 <= i <= x1 and y0 <= j <= y1:
                        count += 1
                if count >= K:
                    ans = min(ans, (x1 - x0)*(y1 - y0))

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
N, K = map(int, input().split())
data = [list(map(int, input().split())) for _ in range(N)]

ans = 10 ** 19
for a in range(N):
    for b in range(N):
        for c in range(N):
            for d in range(N):
                x0 = data[a][0]
                x1 = data[b][0]
                y0 = data[c][1]
                y1 = data[d][1]
                if x0 < x1 and y0 < y1:
                    count = 0
                    for i, j in data:
                        if x0 <= i <= x1 and y0 <= j <= y1:
                            count += 1
                    if count >= K:
                        ans = min(ans, (x1 - x0)*(y1 - y0))

print(ans)

Fixed submission:
N, K = map(int, input().split())
data = [list(map(int, input().split())) for _ in range(N)]

ans = 10 ** 19
for a in range(N):
    for b in range(a+1, N):
        for c in range(N):
            for d in range(c+1, N):
                x0 = data[a][0]
                x1 = data[b][0]
                y0 = data[c][1]
                y1 = data[d][1]

                if x0 > x1:
                    x0, x1 = x1, x0
                if y0 > y1:
                    y0, y1 = y1, y0

                count = 0
                for i, j in data:
                    if x0 <= i <= x1 and y0 <= j <= y1:
                        count += 1
                if count >= K:
                    ans = min(ans, (x1 - x0)*(y1 - y0))

print(ans)