#include <bits/stdc++.h>
using namespace std;


vector<string> detonate(const vector<string>& grid) {
    int rows = grid.size();
    int cols = grid[0].size();
    vector<string> result(rows, string(cols, 'O')); // Create a grid full of bombs



           cout<<"before detonating"<<endl;
           
         for (int i = 0; i < rows; ++i) {
        for (int j = 0; j < cols; ++j) {
              cout<<result[i][j]<<" ";
        }
        cout<<endl;
       }
       
       
    for (int i = 0; i < rows; ++i) {
        for (int j = 0; j < cols; ++j) {
            if (grid[i][j] == 'O') {
                // Detonate bomb and clear surrounding cells
                result[i][j] = '.';
                if (i > 0) result[i - 1][j] = '.';
                if (i < rows - 1) result[i + 1][j] = '.';
                if (j > 0) result[i][j - 1] = '.';
                if (j < cols - 1) result[i][j + 1] = '.';
            }
        }
    }
    
    
        cout<<"After detonating"<<endl;
           
         for (int i = 0; i < rows; ++i) {
        for (int j = 0; j < cols; ++j) {
              cout<<result[i][j]<<" ";
        }
        cout<<endl;
       }
    return result;
}

vector<string> bomberMan(int n, vector<string> grid) {
      if (n == 1) return grid;
    if (n % 2 == 0) return vector<string>(grid.size(), string(grid[0].size(), 'O'));

    vector<string> firstDetonation = detonate(grid);
    vector<string> secondDetonation = detonate(firstDetonation);

   // intial state at 1
   // 3->7->11>15->19 this all will be same as 1st state
   // 5->9>13->17->21 this all will be asme as 2nd state
   // 1st state find if(n%4 == 3) that means it there is the 1st state grid
   // 2nd state finding if (n%4 == 1) RETURN the 2nd second State Grid
      if(n%4 == 1) return secondDetonation;
      return firstDetonation;
  }
  
  
int main() 
{
   int rows = 3;
    int cols = 3;
    vector<string> grid(rows, string(cols, '.'));

    grid[1][1] = 'O';
    
     vector<string> st = bomberMan(11,grid);
     
    // for(int i = 0; i<st.size(); i++){
    //   for(int j = 0; j<st[i].size(); j++){
    //     cout<<st[i][j]<<" ";
    //   }
    //   cout<<endl;
    // }
    return 0;
}
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Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}