Codeforces 400 A. Inna and Choose Options

最新推荐文章于 2019-03-07 10:51:36 发布

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本文介绍了一个有趣的游戏挑战，玩家需要将一串包含'X'和'O'的卡片排列成特定大小的矩阵，以确保至少有一列全部为'X'。通过模拟的方法，文章详细解释了如何找出所有可能的矩阵尺寸组合。

A. Inna and Choose Options

There always is something to choose from! And now, instead of "Noughts and Crosses", Inna choose a very unusual upgrade of this game. The rules of the game are given below:

There is one person playing the game. Before the beginning of the game he puts 12 cards in a row on the table. Each card contains a character: "X" or "O". Then the player chooses two positive integers a and b (a·b = 12), after that he makes a table of size a × b from the cards he put on the table as follows: the first b cards form the first row of the table, the second b cards form the second row of the table and so on, the last b cards form the last (number a) row of the table. The player wins if some column of the table contain characters "X" on all cards. Otherwise, the player loses.

Inna has already put 12 cards on the table in a row. But unfortunately, she doesn't know what numbers a and b to choose. Help her win the game: print to her all the possible ways of numbers a, b that she can choose and win.

Input

The first line of the input contains integer t (1 ≤ t ≤ 100). This value shows the number of sets of test data in the input. Next follows the description of each of the t tests on a separate line.

The description of each test is a string consisting of 12 characters, each character is either "X", or "O". The i-th character of the string shows the character that is written on the i-th card from the start.

Output

For each test, print the answer to the test on a single line. The first number in the line must represent the number of distinct ways to choose the pair a, b. Next, print on this line the pairs in the format axb. Print the pairs in the order of increasing first parameter (a). Separate the pairs in the line by whitespaces.

Sample Input

Input

4
OXXXOXOOXOOX
OXOXOXOXOXOX
XXXXXXXXXXXX
OOOOOOOOOOOO

Output

3 1x12 2x6 4x3
4 1x12 2x6 3x4 6x2
6 1x12 2x6 3x4 4x3 6x2 12x1
0

/*题目大意 给定一个长度为12的字符串包含两种字符'o'和'x',问将这个字符串转换为长宽分别为多少的矩阵会让矩阵的某一列都为'x',输出数量和所有可能的长宽.*/

/*模拟即可*/

#include <algorithm>
#include <iostream>
#include <numeric>
#include <cstring>
#include <iomanip>
#include <string>
#include <vector>
#include <cstdio>
#include <bitset>
#include <queue>
#include <stack>
#include <cmath>
#include <map>
#include <set>
#define LL long long
#define pr pair<int,int>
#define lson l,m,rt<<1
#define rson m+1,r,rt<<1|1
#define Pair pair<int,int>
const int INF = 0x3f3f3f3f;
using namespace std;

char arr[15];

bool cal(int x,int y){
    for(int i=0;i<y;i++){
        bool f = true;
        for(int j=i;j<12;j+=y){
            if(arr[j] == 'O'){
                f = false; break;
            }
        }
        if(f) return true;
    }
    return false;
}

int main(){
    int t;
    scanf("%d",&t);
    while(t-- && scanf("%s",arr)){
        queue<pr>Q;
        for(int i=1;i<=12;i++)
            for(int j=1;j<=12;j++)
                if(i * j == 12 && cal(i,j))
                    Q.push(make_pair(i,j));
        printf("%d",Q.size());
        while(!Q.empty()){
            printf(" %dx%d",Q.front().first,Q.front().second);Q.pop();
        }
        printf("\n");
    }
    return 0;
}