Submit | All submissions | Best solutions | Back to list |
TOE1 - Tic-Tac-Toe ( I ) |
Tic Tac Toe is a child's game played on a 3 by 3 grid. One player, X, starts by placing an X at an unoccupied grid position. Then the other player, O, places an O at an unoccupied grid position. Play alternates between X and O until the grid is filled or one player's symbols occupy an entire line (vertical, horizontal, or diagonal) in the grid.
We will denote the initial empty Tic Tac Toe grid with nine dots. Whenever X or O plays we fill in an X or an O in the appropriate position. The example below illustrates each grid configuration from the beginning to the end of a game in which X wins.
Your job is to read a grid and to determine whether or not it could possibly be part of a valid Tic Tac Toe game. That is, is there a series of plays that can yield this grid somewhere between the start and end of the game?
Input
The first line of input contains N, the number of test cases. 4N-1 lines follow, specifying N grid configurations separated by empty lines.
Output
For each case print "yes" or "no" on a line by itself, indicating whether or not the configuration could be part of a Tic Tac Toe game.
Example
Input: 2 X.O OO. XXX O.X XX. OOO Output: yes no
Added by: | Camilo Andrés Varela León |
Date: | 2006-12-14 |
Time limit: | 1s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ERL JS-RHINO NODEJS PERL6 VB.NET |
Resource: | Waterloo local 2002.09.21 |
hide comments
|
||||||||||
2013-02-07 09:44:34 Viktor Fonic
This one caused me a lot of trouble: XOX OXX OOX no |
||||||||||
2013-01-20 10:51:20 Apurva Kumar
Is X always playing first?If not then please explain 2nd test case. Last edit: 2013-01-20 11:16:01 |
||||||||||
2013-01-14 23:34:50 Haijun Deng
One more test case: XX. X.. OOO yes |
||||||||||
2012-12-31 03:57:11 kamalesh
INPUT: 3 XXO OOX OXX XXX OO. ..O XXX OOO ... OUTPUT: no no no which caused me 2 WA's Last edit: 2012-12-31 03:57:59 |
||||||||||
2012-12-24 17:18:09 SuMiT BaNsAl
i have checked for more than 50 test cases. still getting wrong ans. my submission id: 8337937 |
||||||||||
2012-12-18 23:48:33 Ike Ellsworth
O.X XX. OOO This is not a valid state because X goes first, not O. XXX OOX OO. This is not valid because when X places his 4th X he wins, and O therefore CANNOT place their fourth O, since the game is over. Last edit: 2012-12-18 23:50:18 |
||||||||||
2012-11-28 11:38:17 strings
@admin... please check submission id 8140303... checked for >35 tc's including all given in sample and comments (and my own too), still getting WA. got my mistake...AC :) Last edit: 2012-11-28 14:54:21 |
||||||||||
2012-08-22 16:39:19 Josef Ziegler
Yes it is, but in the input Os are given, not 0s. |
||||||||||
2012-06-15 18:08:30 nani
Last edit: 2014-02-08 03:26:14 |
||||||||||
2012-05-19 09:19:52 Shubham
are all the test cases read at once? |