I am unable to solve this problem in java

help
1

find the largest 3 digit number contained within the given number.
input:
6478434
output:
843

2

You can store the number in character array and use sliding window technique where size of window is 3 and then form numbers using a loop and simultaneously check for max number found till now. And at last you will have maximum 3 digit number.

3

#include

#include<bits/stdc++.h>

#define ll long long int

#define MM endl

using namespace std;

int main()

{

int n;

cin>>n;

int sum=0;

int maxx=0;

int count=0;

int temp=n;

while (temp>0)

{

    temp=temp/10;

    count++;

}



int arr[count];

for (int i = count-1; i >= 0; i--)

{

    arr[i]=n%10;

    n=n/10;

}

for (int i = 0; i < count-2; i++)

{

    for (int j = i; j < i+3; j++)

    {

        sum=sum*10+arr[j];

        

    }

    maxx=max(maxx,sum);

    sum=0;

}

cout<<maxx;

}