Buggy python submission (verdict: Runtime Error):

c = [list(map(int,input().split())) for _ in range(3)]
maxim = max(max(c))
for i in range(maxim):
    for j in range(maxim):
        for k in range(maxim):            
            flag = True
            a = [i,j,k]
            b = [c[0][l]-a[0] for l in range(3)]
            for l in range(1,3):
                for m in range(3):
                    if c[l][m] - a[l] != b[m]:
                        flag = False
                        break
                else:continue
                break  
            else:
                if flag:
                    break
        else:continue
        break
    else:continue
    break
if flag:
    print('Yes')
else:
    print('No')
            

Fixed submission:
c = [list(map(int,input().split())) for _ in range(3)]

a = [0] * 3
b = [0] * 3

for i in range(101):
    flag = True
    a[0] = i
    b[0] = c[0][0]-a[0]
    b[1] = c[0][1]-a[0]
    b[2] = c[0][2]-a[0]
    a[1] = c[1][0]-b[0]
    a[2] = c[2][0]-b[0]
    for j in range(1,3):
        for k in range(1,3):
            if a[j] + b[k] != c[j][k]:
                flag = False
                break
        else:continue
        break
    
    if flag:
        break
    
if flag:
    print('Yes')
else:
    print('No')

Buggy python submission (verdict: Runtime Error):
c = [list(map(int,input().split())) for _ in range(3)]
maxim = max(max(c))
for i in range(maxim):
    for j in range(maxim):
        for k in range(maxim):            
            flag = True
            a = [i,j,k]
            b = [c[0][l]-a[0] for l in range(3)]
            for l in range(1,3):
                for m in range(3):
                    btmp = c[l][m] - a[l]
                    if btmp != b[m]:
                        flag = False
                        break
                else:continue
                break                    
            
            if flag:
                break
        else:continue
        break
    else:continue
    break
if flag:
    print('Yes')
else:
    print('No')
            

Fixed submission:
c = [list(map(int,input().split())) for _ in range(3)]

a = [0] * 3
b = [0] * 3

for i in range(101):
    flag = True
    a[0] = i
    b[0] = c[0][0]-a[0]
    b[1] = c[0][1]-a[0]
    b[2] = c[0][2]-a[0]
    a[1] = c[1][0]-b[0]
    a[2] = c[2][0]-b[0]
    for j in range(1,3):
        for k in range(1,3):
            if a[j] + b[k] != c[j][k]:
                flag = False
                break
        else:continue
        break
    
    if flag:
        break
    
if flag:
    print('Yes')
else:
    print('No')

Buggy python submission (verdict: Runtime Error):

c = [list(map(int,input().split())) for _ in range(3)]
maxim = max(max(c))
for i in range(maxim):
    for j in range(maxim):
        for k in range(maxim):            
            flag = True
            a = [i,j,k]
            b = [c[0][l]-a[0] for l in range(3)]
            for l in range(1,3):
                for m in range(3):
                    btmp = c[l][m] - a[l]
                    if btmp != b[m]:
                        flag = False
                        break
                else:continue
                break                    
            
            if flag:
                break
        else:continue
        break
    else:continue
    break
if flag:
    print('Yes')
else:
    print('No')
            

Fixed submission:
c = [list(map(int,input().split())) for _ in range(3)]

a = [0] * 3
b = [0] * 3

for i in range(101):
    flag = True
    a[0] = i
    b[0] = c[0][0]-a[0]
    b[1] = c[0][1]-a[0]
    b[2] = c[0][2]-a[0]
    a[1] = c[1][0]-b[0]
    a[2] = c[2][0]-b[0]
    for j in range(1,3):
        for k in range(1,3):
            if a[j] + b[k] != c[j][k]:
                flag = False
                break
        else:continue
        break
    
    if flag:
        break
    
if flag:
    print('Yes')
else:
    print('No')