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- #include <bits/stdc++.h>
- using namespace std;
- const int N = 1e6 + 5;
- long long n, dp[N];
- int main(){
- ios::sync_with_stdio(0);
- cin >> n;
- dp[0] = 1;
- for (int i = 1; i <= n; i++) {
- dp[i] += dp[i - 1];
- }
- for (int i = 5; i <= n; i++) {
- dp[i] += dp[i - 5];
- }
- for (int i = 10; i <= n; i++) {
- dp[i] += dp[i - 10];
- }
- cout << dp[n] << endl;
- }
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