Submission #963435

#	Time	Username	Problem	Language	Result	Execution time	Memory
963435		penguin133	Calvinball championship (CEOI15_teams)	C++17	0 / 100	72 ms	712 KiB

teams

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

#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

int n, A[10005], dp[2][10005];
const int mod = 1e6 + 7;
void solve(){
	cin >> n;
	for(int i = 1; i <= n; i++)cin >> A[i];
	dp[0][0] = 1;
	for(int i = 1; i <= n; i++){
		for(int j = 1; j <= A[i]; j++){
			dp[i & 1][j] = dp[(i - 1) & 1][j] * j + dp[(i - 1) & 1][j - 1];
			dp[i & 1][j] %= mod;
		}
	}
	int ans = 0;
	for(int i = 1; i <= A[n]; i++)ans += dp[1 & n][i], ans %= mod;
	cout << ans;
}

main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int tc = 1;
	//cin >> tc;
	for(int tc1=1;tc1<=tc;tc1++){
		// cout << "Case #" << tc1 << ": ";
		solve();
	}
}

Compilation message (stderr)

teams.cpp:31:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   31 | main(){
      | ^~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10