Buggy python submission (verdict: Runtime Error):
H, W = map(int, input().split())

S_list = []
for h in range(1, H-1):
    w = W//2
    S_A = h*W
    S_B = (H-h)*w
    S_C = (H-h)*(W-w)
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
for h in range(1, H-1):
    S_A = h*W
    S_B = ((H-h)//2)*W
    S_C = -(-(H-h)//2)*W
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
H, W = W, H
for h in range(1, H-1):
    w = W//2
    S_A = h*W
    S_B = (H-h)*w
    S_C = (H-h)*(W-w)
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
for h in range(1, H-1):
    S_A = h*W
    S_B = ((H-h)//2)*W
    S_C = -(-(H-h)//2)*W
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
print(min(S_list)) 
    

Fixed submission:
H, W = map(int, input().split())

S_list = []
for h in range(1, H):
    w = W//2
    S_A = h*W
    S_B = (H-h)*w
    S_C = (H-h)*(W-w)
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
for h in range(1, H):
    S_A = h*W
    S_B = ((H-h)//2)*W
    S_C = -(-(H-h)//2)*W
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
H, W = W, H
for h in range(1, H):
    w = W//2
    S_A = h*W
    S_B = (H-h)*w
    S_C = (H-h)*(W-w)
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
for h in range(1, H):
    S_A = h*W
    S_B = ((H-h)//2)*W
    S_C = -(-(H-h)//2)*W
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
print(min(S_list))

Buggy python submission (verdict: Runtime Error):
H, W = map(int, input().split())

S_list = []
for i in range(1, H-1):
    w = W//2
    S_A = i*W
    S_B = (H-i)*w
    S_C = (H-i)*(W-w)
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
for i in range(1, W-1):
    h = H//2
    S_A = i*H
    S_B = (W-i)*h
    S_C = (W-i)*(H-h)
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
print(min(S_list)) 
    

Fixed submission:
H, W = map(int, input().split())

S_list = []
for h in range(1, H):
    w = W//2
    S_A = h*W
    S_B = (H-h)*w
    S_C = (H-h)*(W-w)
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
for h in range(1, H):
    S_A = h*W
    S_B = ((H-h)//2)*W
    S_C = -(-(H-h)//2)*W
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
H, W = W, H
for h in range(1, H):
    w = W//2
    S_A = h*W
    S_B = (H-h)*w
    S_C = (H-h)*(W-w)
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
for h in range(1, H):
    S_A = h*W
    S_B = ((H-h)//2)*W
    S_C = -(-(H-h)//2)*W
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
print(min(S_list))

Buggy python submission (verdict: Runtime Error):
H, W = map(int, input().split())

if H % 3 == 0 or W % 3 == 0:
    print(0)
else:
    S_list = []
    for i in range(1, H-1):
        w = W//2
        S_A = i*W
        S_B = (H-i)*w
        S_C = (H-i)*(W-w)
        S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
    for i in range(1, W-1):
        h = H//2
        S_A = i*H
        S_B = (W-i)*h
        S_C = (W-i)*(H-h)
        S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
    print(min(S_list)) 
    

Fixed submission:
H, W = map(int, input().split())

S_list = []
for h in range(1, H):
    w = W//2
    S_A = h*W
    S_B = (H-h)*w
    S_C = (H-h)*(W-w)
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
for h in range(1, H):
    S_A = h*W
    S_B = ((H-h)//2)*W
    S_C = -(-(H-h)//2)*W
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
H, W = W, H
for h in range(1, H):
    w = W//2
    S_A = h*W
    S_B = (H-h)*w
    S_C = (H-h)*(W-w)
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
for h in range(1, H):
    S_A = h*W
    S_B = ((H-h)//2)*W
    S_C = -(-(H-h)//2)*W
    S_list.append(max(S_A,S_B,S_C) -min(S_A,S_B,S_C))
print(min(S_list))