Created
June 27, 2018 10:23
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13115.py
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import sys | |
def read_sudoku(n): | |
sudoku = [] | |
for _ in range(n): | |
sudoku.append(list(map(int, sys.stdin.readline().strip().split(' ')))) | |
return sudoku | |
def only_appear_once(n, row): | |
return len(set(row)) == n and set(row) == set(range(1, n + 1)) | |
def is_row_correct(n, sudoku): | |
for row in sudoku: | |
if not only_appear_once(n, row): | |
return False | |
return True | |
def is_col_correct(n, sudoku): | |
for col in range(n): | |
if not only_appear_once(n, [sudoku[row][col] for row in range(n)]): | |
return False | |
return True | |
def is_sqr_correct(n, sudoku): | |
sqr = int(n ** .5) | |
for r in range(0, n, sqr): | |
for c in range(0, n, sqr): | |
square = [] | |
for _ in range(sqr): | |
square.extend(sudoku[r+_][c:c+sqr]) | |
if not only_appear_once(n, square): | |
return False | |
return True | |
def is_correct_sudoku(n, sudoku): | |
if not is_row_correct(n, sudoku): | |
return False | |
if not is_col_correct(n, sudoku): | |
return False | |
if not is_sqr_correct(n, sudoku): | |
return False | |
return True | |
sys.stdin.readline() | |
while True: | |
try: | |
n = int(sys.stdin.readline()) | |
except ValueError: | |
break | |
sudoku = read_sudoku(n) | |
print('yes' if is_correct_sudoku(n, sudoku) else 'no') |
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