시간 제한 | 메모리 제한 | 제출 | 정답 | 맞힌 사람 | 정답 비율 |
---|---|---|---|---|---|
1 초 | 512 MB | 130 | 99 | 80 | 80.000% |
You are given an n-by-n grid where each square is colored either black or white. A grid is correct if all of the following conditions are satisfied:
Given a grid, determine whether it is correct.
The first line contains an integer n (2 ≤ n ≤ 24; n is even). Each of the next n lines contains a string of length n consisting solely of the characters ‘B’ and ‘W’, representing the colors of the grid squares.
If the grid is correct, print the number 1 on a single line. Otherwise, print the number 0 on a single line.
4 WBBW WBWB BWWB BWBW
1
4 BWWB BWBB WBBW WBWW
0
6 BWBWWB WBWBWB WBBWBW BBWBWW BWWBBW WWBWBB
0
6 WWBBWB BBWWBW WBWBWB BWBWBW BWBBWW WBWWBB
1