Submission #62523

#	Time	Username	Problem	Language	Result	Execution time	Memory
62523		MatheusLealV	Calvinball championship (CEOI15_teams)	C++17	10 / 100	10 ms	1244 KiB

teams

#include <bits/stdc++.h>
#define N 10005
using namespace std;
typedef long long ll;

ll n, k, v[N], tot, used[N], mod = 1000007;

ll Pow(ll x, ll p)
{
	if(!p) return 1LL;

	ll ans = Pow(x, p/2);

	ans = (ans*ans)%mod;

	if(p & 1) return (ans*x)%mod;

	return ans;
}

ll pos()
{
	//for(ll i = 1; i <= k; i++) tot += solve(n, k);

	set<ll> add;

	ll q;

	for(ll i = 1; i <= n; i++)
	{
	//	tot += solve_suf(n - i, add.size()) * (v[i] - 1);

		add.insert(v[i]);

		tot = (tot + Pow(add.size(), n - i)*(v[i] - 1))%mod;
	}

	return (tot + 1)%mod;
}

int main()
{
	ios::sync_with_stdio(false); cin.tie(0);

	cin>>n;

	for(ll i = 1; i <= n; i++)
	{
		cin>>v[i];

		if(!used[v[i]]) k++;

		used[v[i]] = 1;
	}

	cout<<pos()<<"\n";
}

Compilation message (stderr)

teams.cpp: In function 'll pos()':
teams.cpp:27:5: warning: unused variable 'q' [-Wunused-variable]
  ll q;
     ^

• Subtask 1: 10 / 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