Buggy python submission (verdict: Runtime Error):
N = int(input())
xy = [list(map(int,input().split())) for i in range(N)]
x = [xy[i][0] for i in range(N)]
y = [xy[i][1] for j in range(N)]
if N == 1:
    print(1)
    exit()
else:
    ans = N
    for i in range(N):
        for j in range(N):
            if i == j:
                continue
            dx,dy = x[j]-x[i],y[j]-y[i]
            cnt = 0
            for k in range(N):
                for l in range(N):
                    if k == l:
                        continue
                    if dx == x[k]-x[l] and dy == y[k]-y[l]:
                        cnt += 1
            ans = min(ans,N-cnt)

print(ans)

Fixed submission:
N = int(input())
xy = [list(map(int,input().split())) for i in range(N)]
x = [xy[i][0] for i in range(N)]
y = [xy[i][1] for i in range(N)]
if N == 1:
    print(1)
    exit()
else:
    ans = N
    for i in range(N):
        for j in range(N):
            if i == j:
                continue
            dx,dy = x[j]-x[i],y[j]-y[i]
            cnt = 0
            for k in range(N):
                for l in range(N):
                    if k == l:
                        continue
                    if dx == x[k]-x[l] and dy == y[k]-y[l]:
                        cnt += 1
            ans = min(ans,N-cnt)

print(ans)

Buggy python submission (verdict: Runtime Error):
N = int(input())
xy = [list(map(int,input().split())) for i in range(N)]
cst = 1
xy.sort(key = lambda x:x[0])
keep = xy[0]
p = xy[1][0]-xy[0][0]
q = xy[1][1]-xy[0][1]
if N != 1:
    for i in range(1,N-1):
        if not(xy[i][0] == keep[0]+p and xy[i][1] == keep[1]+q):
            cst += 1
            p = xy[i+1][0] - xy[i][0]
            q = xy[i+1][1] - xy[i][1]
            keep = xy[i+1]
else:
    print(1)

print(cst)

Fixed submission:
N = int(input())
xy = [list(map(int,input().split())) for i in range(N)]
x = [xy[i][0] for i in range(N)]
y = [xy[i][1] for i in range(N)]
if N == 1:
    print(1)
    exit()
else:
    ans = N
    for i in range(N):
        for j in range(N):
            if i == j:
                continue
            dx,dy = x[j]-x[i],y[j]-y[i]
            cnt = 0
            for k in range(N):
                for l in range(N):
                    if k == l:
                        continue
                    if dx == x[k]-x[l] and dy == y[k]-y[l]:
                        cnt += 1
            ans = min(ans,N-cnt)

print(ans)

Buggy python submission (verdict: Runtime Error):
N = int(input())
xy = [list(map(int,input().split())) for i in range(N)]
cst = 1
keep = xy[0]
xy.sort(key = lambda x:x[0])
p = xy[1][0]-xy[0][0]
q = xy[1][1]-xy[0][1]
for i in range(1,N-1):
    if not(xy[i][0] == keep[0]+p and xy[i][1] == keep[1]+q):
        cst += 1
        p = xy[i+1][0] - xy[i][0]
        q = xy[i+1][1] - xy[i][1]
        keep = xy[i+1]

print(cst)

Fixed submission:
N = int(input())
xy = [list(map(int,input().split())) for i in range(N)]
x = [xy[i][0] for i in range(N)]
y = [xy[i][1] for i in range(N)]
if N == 1:
    print(1)
    exit()
else:
    ans = N
    for i in range(N):
        for j in range(N):
            if i == j:
                continue
            dx,dy = x[j]-x[i],y[j]-y[i]
            cnt = 0
            for k in range(N):
                for l in range(N):
                    if k == l:
                        continue
                    if dx == x[k]-x[l] and dy == y[k]-y[l]:
                        cnt += 1
            ans = min(ans,N-cnt)

print(ans)