#include <bits/stdc++.h> using namespace std;

int main() { int n, ans = 0, s = 0; cin >> n; while (n > 0) { n = n / 10; ans++; } cout << ans << " "; if (ans % 2 != 0) { for (int i = 1; i <= ans; i += 2) { s = s + i; } } else if (ans % 2 == 0) { for (int i = 2; i <= ans; i += 2) { s = s + i; } } cout << s; return 0; }

有坑