最长公共串

#include <string>
#include <iostream>
using namespace std;
int main()
{
    string a;
    string b;
    cin>>a;
    cin>>b;
    int count = 0;
    int Max = 0;
    int start1,start2;
    for(int i=0; i<a.size(); i++)
    {
        for(int j=0; j<b.size(); j++)
        {
            start1=i;
            start2=j;
            while(a[start1]==b[start2] && start1<a.size() && start2<b.size())
            {
                start1++;
                start2++;
                count++;
            }
            if(count>Max)
            {
                Max=count;
            }
            count=0;
        }
    }

    cout<<Max<<endl;
    
    return 0;
}