func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[1000005];   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     int i, j, k, l, m, n, t, r, cnt;     int flag = 0;     long long ans = 0, an = 0;     t = 1;     while (t--) {       cin >> n >> m;       cout << min(n, m) + 1 << endl;       int x, y;       x = 0;       y = m;       while (x <= n && y >= 0) {         cout << x <<     << y << endl;         x++;         y--;       }     }   }   