#include<bits/stdc++.h>
#define IOS ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define ll long long
#define pb push_back
#define pf push_front
#define vi vector<ll>
#define vii vector<vi>
#define pll pair<ll,ll>
#define vpll vector<pll>
#define N 200005
#define fi first
#define se second
using namespace std;
const ll mod = 1e9+7;
const int mx = 1e6;
char a[105][105];
vi mX = {0, 0, 1, -1, 1, 1, -1, -1};
vi mY = {1, -1, 0, 0, 1, -1, 1, -1};
bool vst[105][105] = {0};
ll n,m;
ll cnt = 0;
void floodfill(ll r, ll c){
    if(r >= n || c >= m || vst[r][c] || a[r][c] != '1') return;
    vst[r][c] = 1;
    ++cnt;
    for(int i = 0; i < 8; ++i){
        if(!vst[r+mX[i]][c+mY[i]] && r+mX[i]>=0 && c+mY[i]>=0){
            floodfill(r+mX[i], c+mY[i]);
        }
    }   
}
ll ans;
ll cases = 0;
string s;
void solve(){
    n = 0;
    m = 0;
    for(int i = 0; i < 30; ++i){
        for(int j = 0; j < 30; ++j){
            a[i][j] = '\0';
            vst[i][j] = 0;
        }
    }
    while(getline(cin, s)){
        if(s.empty() && !cases){
            ++cases;
            continue;
        }
        if(s.empty()){
            
            ans = 0;
            for(int i = 0; i < n; ++i){
                for(int j = 0; j < m; ++j){
                    if(a[i][j] == '1' && !vst[i][j]){
                        cnt = 0;
                        floodfill(i,j);
                        ans = max(ans,cnt);
                    }
                }
            }
            cout << ans << '\n';
            return;
        }
        if(s.size()){
            m = s.size();
            for(int i = 0; i < m; ++i){
                a[n][i] = s[i];
            }
            ++n;
        }
    }
}
signed main(){
    //freopen(".inp", "r", stdin);
    //freopen(".out", "w", stdout);
    IOS
    int T;
    cin >> T;
    ++T;
    getline(cin, s);
    while(T--){
        solve();
        if(T) cout << '\n';
    }
}

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

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
}