#include <iostream>
#include <sys/types.h>
#include <unistd.h>
#include <numeric>
#include <algorithm>

using namespace std;

int main() {
   int i, j;
   int biggest{0};


   for(i = 0; i < 10'000; ++i) {
       for(j = 0; j < 10'000; ++j) {
          biggest = max(biggest, gcd(i,j));
       }
   }

   cout << "The biggest is " << biggest << endl;

   return 0;
}