#include <bits/stdc++.h>   using namespace std;   long long a[101][101];   int main() {     long long n, m;     cin >> n >> m;     long long mn = min(m, n);     cout << mn + 1 << endl;     for (long long i = 0; i <= mn; i++)       cout << i <<     << (mn - i) % (mn + 1) << endl;   }   