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- #include <bits/stdc++.h>
- using namespace std;
- const int MOD = 1000000;
- int main(int argc, char const *argv[]) {
- int A[26] = {1};
- for (int i = 1; i < 26; i++) A[i] = (A[i - 1] * i) % MOD;
- int n;
- cin >> n;
- int sum = 0;
- for (int i = 1; i <= 25 && i <= n; i++) {
- sum = (sum + A[i]) % MOD;
- }
- cout << sum << endl;
- return 0;
- }
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