CSES - HIIT Open 2018 - Results
Test results
testverdicttime
#1ACCEPTED0.05 sdetails
#2ACCEPTED0.04 sdetails
#3ACCEPTED0.05 sdetails
#4ACCEPTED0.04 sdetails
#50.06 sdetails
#6ACCEPTED0.04 sdetails
#7ACCEPTED0.07 sdetails
#8ACCEPTED0.05 sdetails
#9ACCEPTED0.05 sdetails
#10ACCEPTED0.04 sdetails
#11ACCEPTED0.05 sdetails
#120.05 sdetails
#130.05 sdetails
#14ACCEPTED0.04 sdetails
#150.05 sdetails
#16ACCEPTED0.04 sdetails
#17ACCEPTED0.11 sdetails
#18ACCEPTED0.11 sdetails
#19ACCEPTED0.12 sdetails
#20ACCEPTED0.16 sdetails
#210.20 sdetails
#22ACCEPTED0.14 sdetails

### Code

```n = int(input())
grid = []
for i in range(n):
row = input()
grid.append(row)

def countColors(grid, n):
color = 0
#Columns:
for column_number in range(n):
if grid[0][column_number] == '1':
for row in grid:
if row[column_number] == '0':
if grid[0] != '1'*n:
return -1
else:
color += 1

if color == n:
return color
#Rows:
for row in grid:
if row == '1'*n:
color += 1
else:
for i in range(n):
if row[i] == '1':
if grid[0][i] == '0':
return -1

if color == 0:
for row in grid:
if row != '0'*n:
return -1
return color

print(countColors(grid, n))
```

### Test details

#### Test 1

Verdict: ACCEPTED

input
1
0

correct output
0

user output
0

#### Test 2

Verdict: ACCEPTED

input
1
1

correct output
1

user output
1

#### Test 3

Verdict: ACCEPTED

input
2
00
00

correct output
0

user output
0

#### Test 4

Verdict: ACCEPTED

input
2
10
00

correct output
-1

user output
-1

Verdict:

input
2
11
00

correct output
1

user output
2

#### Test 6

Verdict: ACCEPTED

input
2
11
01

correct output
2

user output
2

#### Test 7

Verdict: ACCEPTED

input
2
11
11

correct output
2

user output
2

#### Test 8

Verdict: ACCEPTED

input
3
000
000
000

correct output
0

user output
0

#### Test 9

Verdict: ACCEPTED

input
3
100
100
100

correct output
1

user output
1

#### Test 10

Verdict: ACCEPTED

input
3
101
101
101

correct output
2

user output
2

#### Test 11

Verdict: ACCEPTED

input
3
111
101
101

correct output
3

user output
3

Verdict:

input
3
111
000
000

correct output
1

user output
3

Verdict:

input
3
111
000
111

correct output
2

user output
3

#### Test 14

Verdict: ACCEPTED

input
3
111
100
111

correct output
3

user output
3

Verdict:

input
3
111
101
111

correct output
4

user output
3

#### Test 16

Verdict: ACCEPTED

input
3
111
111
111

correct output
3

user output
3

#### Test 17

Verdict: ACCEPTED

input
1000
000000000000000000000000000000...

correct output
0

user output
0

#### Test 18

Verdict: ACCEPTED

input
1000
000000000000000000000000000000...

correct output
10

user output
10

#### Test 19

Verdict: ACCEPTED

input
1000
100000000000000000100000000000...

correct output
41

user output
41

#### Test 20

Verdict: ACCEPTED

input
1000
000000100000000001000000010000...

correct output
192

user output
192

#### Test 21

Verdict:

input
1000
111111111111111111111111111111...

correct output
999

user output
1000

#### Test 22

Verdict: ACCEPTED

input
1000
111111111111111111111111111111...

correct output
1000

user output
1000