#include <iostream> using namespace std; #define MOD 777013 int n; long long s[2], nr; int main() { cin >> n; s[0] = 26; s[1] = 26 * 26; for (int i = 3; i <= n; ++ i) { nr = (s[1] * 25 + s[0] * 25) % MOD; s[0] = s[1]; s[1] = nr; } cout << nr; return 0; }