C2. Binary Table (Hard Version)

在给定的二进制矩阵中,通过选取不同位置的3个相邻单元格进行符号翻转,使得所有元素变为0。题目提供了最大操作次数,并保证解决方案总是存在的。给出输入输出示例以及操作描述。

https://codeforces.ml/contest/1440/problem/C2

This is the hard version of the problem. The difference between the versions is in the number of possible operations that can be made. You can make hacks if and only if you solved both versions of the problem.

You are given a binary table of size n×mn×m. This table consists of symbols 00 and 11.

You can make such operation: select 33 different cells that belong to one 2×22×2 square and change the symbols in these cells (change 00 to 11 and 11 to 00).

Your task is to make all symbols in the table equal to 00. You are allowed to make at most nmnm operations. You don't need to minimize the number of operations.

It can be proved, that it is always possible.

Input

The first line contains a single integer tt (1≤t≤50001≤t≤5000) — the number of test cases. The next lines contain descriptions of test cases.

The first line of the description of each test case contains two integers nn, mm (2≤n,m≤1002≤n,m≤100).

Each of the next nn lines contains a binary string of length mm, describing the symbols of the next row of the table.

It is guaranteed, that the sum of nmnm for all test cases does not exceed 2000020000.

Output

For each test case print the integer kk (0≤k≤nm0≤k≤nm) — the number of operations.

In the each of the next kk lines print 66 integers x1,y1,x2,y2,x3,y3x1,y1,x2,y2,x3,y3 (1≤x1,x2,x3≤n,1≤y1,y2,y3≤m1≤x1,x2,x3≤n,1≤y1,y2,y3≤m) describing the next operation. This operation will be made with three cells (x1,y1)(x1,y1), (x2,y2)(x2,y2), (x3,y3)(x3,y3). These three cells should be different. These three cells should belong to some 2×22×2 square.

Example

input

Copy

5
2 2
10
11
3 3
011
101
110
4 4
1111
0110
0110
1111
5 5
01011
11001
00010
11011
10000
2 3
011
101

output

Copy

1
1 1 2 1 2 2
2 
2 1 3 1 3 2
1 2 1 3 2 3
4
1 1 1 2 2 2 
1 3 1 4 2 3
3 2 4 1 4 2
3 3 4 3 4 4
4
1 2 2 1 2 2 
1 4 1 5 2 5 
4 1 4 2 5 1
4 4 4 5 3 4
2
1 3 2 2 2 3
1 2 2 1 2 2

Note

In the first test case, it is possible to make only one operation with cells (1,1)(1,1), (2,1)(2,1), (2,2)(2,2). After that, all symbols will be equal to 00.

In the second test case:

  • operation with cells (2,1)(2,1), (3,1)(3,1), (3,2)(3,2). After it the table will be:
    011
    001
    000
    
  • operation with cells (1,2)(1,2), (1,3)(1,3), (2,3)(2,3). After it the table will be:
    000
    000
    000
    

In the fifth test case:

  • operation with cells (1,3)(1,3), (2,2)(2,2), (2,3)(2,3). After it the table will be:
    010
    110
    
  • operation with cells (1,2)(1,2), (2,1)(2,1), (2,2)(2,2). After it the table will be:
    000
    000
    

代码:

#include<bits/stdc++.h>
using namespace std;
#define ll long long
const int maxn=1e6+5;
const ll mod=1e9+7;
ll t,m,n,c0,c1,h,ans,k,cnt;
char a[101][101];
ll b[maxn][10][2];
int f(int i,int j)
{
    int s=0;
    if(a[i][j]=='1')
    s++;
    if(a[i][j+1]=='1')
        s++;
    if(a[i+1][j]=='1')
        s++;
    if(a[i+1][j+1]=='1')
        s++;
    return s;
}
void f3(int i,int j)
{
    cnt++;
    int u=0;
    if(a[i][j]=='1')
    {
        u++;
        b[cnt][u][0]=i;
        b[cnt][u][1]=j;
        a[i][j]='0';
    }
    if(a[i+1][j]=='1')
    {
        u++;
        b[cnt][u][0]=i+1;
        b[cnt][u][1]=j;
        a[i+1][j]='0';
    }
    if(a[i+1][j+1]=='1')
    {
        u++;
        b[cnt][u][0]=i+1;
        b[cnt][u][1]=j+1;
        a[i+1][j+1]='0';
    }
    if(a[i][j+1]=='1')
    {
        u++;
        b[cnt][u][0]=i;
        b[cnt][u][1]=j+1;
        a[i][j+1]='0';
    }
}
void f2(int i,int j)
{
    cnt++;
    int u=0;
    if(a[i][j]=='0')
    {
        u++;
        b[cnt][u][0]=i;
        b[cnt][u][1]=j;
        a[i][j]='2';
    }
    if(a[i+1][j]=='0')
    {
        u++;
        b[cnt][u][0]=i+1;
        b[cnt][u][1]=j;
        a[i+1][j]='2';
    }
    if(a[i+1][j+1]=='0')
    {
        u++;
        b[cnt][u][0]=i+1;
        b[cnt][u][1]=j+1;
        a[i+1][j+1]='2';
    }
    if(a[i][j+1]=='0')
    {
        u++;
        b[cnt][u][0]=i;
        b[cnt][u][1]=j+1;
        a[i][j+1]='2';
    }
    if(a[i][j]=='1')
    {
        u++;
        b[cnt][u][0]=i;
        b[cnt][u][1]=j;
        a[i][j]='0';
    }
    else if(a[i][j]=='2')
        a[i][j]='1';
    if(a[i+1][j]=='1')
    {
        if(u==2)
        {
            u++;
            b[cnt][u][0]=i+1;
            b[cnt][u][1]=j;
            a[i+1][j]='0';
        }

    }
    else if(a[i+1][j]=='2')
        a[i+1][j]='1';
    if(a[i+1][j+1]=='1')
    {
        if(u==2)
        {
            u++;
            b[cnt][u][0]=i+1;
            b[cnt][u][1]=j+1;
            a[i+1][j+1]='0';
        }
    }
    else if(a[i+1][j+1]=='2')
        a[i+1][j+1]='1';
    if(a[i][j+1]=='1')
    {
        if(u==2)
        {
            u++;
            b[cnt][u][0]=i;
            b[cnt][u][1]=j+1;
            a[i][j+1]='0';
        }

    }
    else if(a[i][j+1]=='2')
        a[i][j+1]='1';
    f3(i,j);
}
void f1(int i,int j)
{
    cnt++;
    int u=0;
    if(a[i][j]=='0')
    {
        u++;
        b[cnt][u][0]=i;
        b[cnt][u][1]=j;
        a[i][j]='2';
    }
    if(a[i+1][j]=='0')
    {
        u++;
        b[cnt][u][0]=i+1;
        b[cnt][u][1]=j;
        a[i+1][j]='2';
    }
    if(a[i+1][j+1]=='0')
    {
        if(u==1)
        {
            u++;
            b[cnt][u][0]=i+1;
            b[cnt][u][1]=j+1;
            a[i+1][j+1]='2';
        }

    }
    if(a[i][j+1]=='0')
    {
        if(u==1)
        {
            u++;
            b[cnt][u][0]=i;
            b[cnt][u][1]=j+1;
            a[i][j+1]='2';
        }

    }
    if(a[i][j]=='1')
    {
        u++;
        b[cnt][u][0]=i;
        b[cnt][u][1]=j;
        a[i][j]='0';
    }
    else if(a[i][j]=='2')
        a[i][j]='1';
    if(a[i+1][j]=='1')
    {
        if(u==2)
        {
            u++;
            b[cnt][u][0]=i+1;
            b[cnt][u][1]=j;
            a[i+1][j]='0';
        }

    }
    else if(a[i+1][j]=='2')
        a[i+1][j]='1';
    if(a[i+1][j+1]=='1')
    {
        if(u==2)
        {
            u++;
            b[cnt][u][0]=i+1;
            b[cnt][u][1]=j+1;
            a[i+1][j+1]='0';
        }
    }
    else if(a[i+1][j+1]=='2')
        a[i+1][j+1]='1';
    if(a[i][j+1]=='1')
    {
        if(u==2)
        {
            u++;
            b[cnt][u][0]=i;
            b[cnt][u][1]=j+1;
            a[i][j+1]='0';
        }

    }
    else if(a[i][j+1]=='2')
        a[i][j+1]='1';
    f2(i,j);
}
void f4(int i,int j)
{
    cnt++;
    int u=0;
    if(a[i][j]=='1')
    {
        u++;
        b[cnt][u][0]=i;
        b[cnt][u][1]=j;
        a[i][j]='0';
    }
    if(a[i+1][j]=='1')
    {
        u++;
        b[cnt][u][0]=i+1;
        b[cnt][u][1]=j;
        a[i+1][j]='0';
    }
    if(a[i+1][j+1]=='1')
    {
        u++;
        b[cnt][u][0]=i+1;
        b[cnt][u][1]=j+1;
        a[i+1][j+1]='0';
    }
    if(a[i][j+1]=='1')
    {
        if(u==2)
        {
            u++;
            b[cnt][u][0]=i;
            b[cnt][u][1]=j+1;
            a[i][j+1]='0';
        }
    }
    f1(i,j);
}
int main()
{
    cin>>t;
    while(t--)
    {
        cin>>n>>m;
        for(int i=0;i<n;i++)
        {
            cin>>a[i];
        }
        cnt=0;
        if(n%2&&m%2)
        {
            for(int j=0;j<m-1;j+=2)
            {
                if(a[n-1][j]=='0'&&a[n-1][j+1]=='0')
                    continue;
                cnt++;
                int u=0;
                if(a[n-1][j]=='1')
                {
                    u++;
                    b[cnt][u][0]=n-1;
                    b[cnt][u][1]=j;
                    a[n-1][j]='0';
                }
                if(a[n-1][j+1]=='1')
                {
                    u++;
                    b[cnt][u][0]=n-1;
                    b[cnt][u][1]=j+1;
                    a[n-1][j+1]='0';
                }
                if(u==1)
                {
                    u++;
                    b[cnt][u][0]=n-2;
                    b[cnt][u][1]=j;
                    if(a[n-2][j]=='1')
                    a[n-2][j]='0';
                    else
                    a[n-2][j]='1';
                    u++;
                    b[cnt][u][0]=n-2;
                    b[cnt][u][1]=j+1;
                    if(a[n-2][j+1]=='1')
                    a[n-2][j+1]='0';
                    else
                    a[n-2][j+1]='1';
                }
                else if(u==2)
                {
                    u++;
                    b[cnt][u][0]=n-2;
                    b[cnt][u][1]=j;
                    if(a[n-2][j]=='1')
                    a[n-2][j]='0';
                    else
                    a[n-2][j]='1';
                }
            }
            for(int j=0;j<n-1;j+=2)
            {
                if(a[j][m-1]=='0'&&a[j+1][m-1]=='0')
                    continue;
                cnt++;
                int u=0;
                if(a[j][m-1]=='1')
                {
                    u++;
                    b[cnt][u][0]=j;
                    b[cnt][u][1]=m-1;
                    a[j][m-1]='0';
                }
                if(a[j+1][m-1]=='1')
                {
                    u++;
                    b[cnt][u][0]=j+1;
                    b[cnt][u][1]=m-1;
                    a[j+1][m-1]='0';
                }
                if(u==1)
                {
                    u++;
                    b[cnt][u][0]=j;
                    b[cnt][u][1]=m-2;
                    if(a[j][m-2]=='1')
                    a[j][m-2]='0';
                    else
                    a[j][m-2]='1';
                    u++;
                    b[cnt][u][0]=j+1;
                    b[cnt][u][1]=m-2;
                    if(a[j+1][m-2]=='1')
                    a[j+1][m-2]='0';
                    else
                    a[j+1][m-2]='1';
                }
                else if(u==2)
                {
                    u++;
                    b[cnt][u][0]=j;
                    b[cnt][u][1]=m-2;
                    if(a[j][m-2]=='1')
                    a[j][m-2]='0';
                    else
                    a[j][m-2]='1';
                }
            }
            if(a[n-1][m-1]=='1')
            {
                cnt++;
                b[cnt][1][0]=n-1;
                b[cnt][1][1]=m-1;
                b[cnt][2][0]=n-2;
                b[cnt][2][1]=m-1;
                b[cnt][3][0]=n-1;
                b[cnt][3][1]=m-2;
                cnt++;
                b[cnt][1][0]=n-2;
                b[cnt][1][1]=m-2;
                b[cnt][2][0]=n-2;
                b[cnt][2][1]=m-1;
                b[cnt][3][0]=n-1;
                b[cnt][3][1]=m-2;
                if(a[n-2][m-2]=='0')
                    a[n-2][m-2]='1';
                else
                    a[n-2][m-2]='0';
                a[n-1][m-1]='0';
            }
        }
        else if(n%2)
        {
            for(int j=0;j<m-1;j+=2)
            {
                if(a[n-1][j]=='0'&&a[n-1][j+1]=='0')
                    continue;
                cnt++;
                int u=0;
                if(a[n-1][j]=='1')
                {
                    u++;
                    b[cnt][u][0]=n-1;
                    b[cnt][u][1]=j;
                    a[n-1][j]='0';
                }
                if(a[n-1][j+1]=='1')
                {
                    u++;
                    b[cnt][u][0]=n-1;
                    b[cnt][u][1]=j+1;
                    a[n-1][j+1]='0';
                }
                if(u==1)
                {
                    u++;
                    b[cnt][u][0]=n-2;
                    b[cnt][u][1]=j;
                    if(a[n-2][j]=='1')
                    a[n-2][j]='0';
                    else
                    a[n-2][j]='1';
                    u++;
                    b[cnt][u][0]=n-2;
                    b[cnt][u][1]=j+1;
                    if(a[n-2][j+1]=='1')
                    a[n-2][j+1]='0';
                    else
                    a[n-2][j+1]='1';
                }
                else if(u==2)
                {
                    u++;
                    b[cnt][u][0]=n-2;
                    b[cnt][u][1]=j;
                    if(a[n-2][j]=='1')
                    a[n-2][j]='0';
                    else
                    a[n-2][j]='1';
                }
            }
        }
        else if(m%2)
        {
            for(int j=0;j<n-1;j+=2)
            {
                if(a[j][m-1]=='0'&&a[j+1][m-1]=='0')
                    continue;
                cnt++;
                int u=0;
                if(a[j][m-1]=='1')
                {
                    u++;
                    b[cnt][u][0]=j;
                    b[cnt][u][1]=m-1;
                    a[j][m-1]='0';
                }
                if(a[j+1][m-1]=='1')
                {
                    u++;
                    b[cnt][u][0]=j+1;
                    b[cnt][u][1]=m-1;
                    a[j+1][m-1]='0';
                }
                if(u==1)
                {
                    u++;
                    b[cnt][u][0]=j;
                    b[cnt][u][1]=m-2;
                    if(a[j][m-2]=='1')
                    a[j][m-2]='0';
                    else
                    a[j][m-2]='1';
                    u++;
                    b[cnt][u][0]=j+1;
                    b[cnt][u][1]=m-2;
                    if(a[j+1][m-2]=='1')
                    a[j+1][m-2]='0';
                    else
                    a[j+1][m-2]='1';
                }
                else if(u==2)
                {
                    u++;
                    b[cnt][u][0]=j;
                    b[cnt][u][1]=m-2;
                    if(a[j][m-2]=='1')
                    a[j][m-2]='0';
                    else
                    a[j][m-2]='1';
                }
            }
        }
        for(int i=0;i<n-1;i+=2)
        {
            for(int j=0;j<m-1;j+=2)
            {
                if(f(i,j)==0)
                    continue;
                else if(f(i,j)==3)
                {
                    f3(i,j);
                }
                else if(f(i,j)==2)
                {
                    f2(i,j);
                }
                else if(f(i,j)==4)
                {
                    f4(i,j);
                }
                else
                {
                    f1(i,j);
                }
            }
        }
        cout<<cnt<<endl;
        for(int i=1;i<=cnt;i++)
        {
            for(int j=1;j<=3;j++)
            {
                cout<<b[i][j][0]+1<<" "<<b[i][j][1]+1;
                if(j==3)
                {
                    if(i==cnt)
                        cout<<endl;
                    else
                        cout<<" \n";
                }
                else
                    cout<<" ";
            }
        }
        
    }
    return 0;
}

 

`com.github.binarywang` 下有多个与微信相关的 Java 库,如微信支付、微信小程序等。以微信支付库为例,说明在 Spring Boot 3 中使用和集成 `com.github.binarywang` 相关库的情况。 ### 1. 添加依赖 在 `pom.xml` 中添加 `com.github.binarywang` 的微信支付库依赖: ```xml <dependency> <groupId>com.github.binarywang</groupId> <artifactId>wx-java-pay</artifactId> <version>最新版本</version> </dependency> ``` ### 2. 配置类编写 参考引用[1]中的配置类,在 Spring Boot 3 中可以进行如下配置: ```java import com.github.binarywang.wxpay.config.WxPayConfig; import com.github.binarywang.wxpay.service.WxPayService; import com.github.binarywang.wxpay.service.impl.WxPayServiceImpl; import org.springframework.boot.autoconfigure.condition.ConditionalOnClass; import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration @ConditionalOnClass(WxPayService.class) public class MyWxPayConfig { @Bean @ConditionalOnMissingBean public WxPayService wxService() { WxPayConfig payConfig = new WxPayConfig(); payConfig.setAppId("xxxxxx"); payConfig.setMchId("xxxxx"); payConfig.setMchKey("xxxxxxxxxx"); payConfig.setKeyPath("D:\\xx\\xx\\xxxx\\apiclient_cert.p12"); payConfig.setUseSandboxEnv(false); //不使用沙箱环境 WxPayService wxPayService = new WxPayServiceImpl(); wxPayService.setConfig(payConfig); return wxPayService; } } ``` ### 3. 使用服务 在需要使用微信支付服务的地方注入 `WxPayService`: ```java import com.github.binarywang.wxpay.service.WxPayService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; @RestController public class WxPayController { @Autowired private WxPayService wxPayService; @GetMapping("/testPay") public String testPay() { // 调用 wxPayService 的方法进行支付相关操作 return "Test Pay"; } } ``` ### 集成注意事项 - **版本兼容性**:确保 `com.github.binarywang` 库的版本与 Spring Boot 3 兼容。 - **配置信息安全**:敏感信息如 `appId`、`mchId`、`mchKey` 等应妥善保管,避免硬编码在代码中,可以使用配置文件进行管理。 ### 微信小程序相关库集成 如果是集成微信小程序相关库,参考引用[2],可以先在 `application.properties` 或 `application.yml` 中配置小程序信息,然后编写配置类读取配置。 ### 示例配置文件 ```yaml wx: miniapp: configs: - appid: your_appid secret: your_secret ``` ### 示例配置类 ```java import java.util.List; import org.springframework.boot.context.properties.ConfigurationProperties; import lombok.Data; @Data @ConfigurationProperties(prefix = "wx.miniapp") public class WxMaProperties { private List<Config> configs; @Data public static class Config { /** * 设置微信小程序的appid */ private String appid; /** * 设置微信小程序的Secret */ private String secret; } } ``` ### 总结 在 Spring Boot 3 中集成 `com.github.binarywang` 相关库,主要是添加依赖、编写配置类、注入服务并使用。不同的库可能有不同的配置和使用方式,但整体思路相似。
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