Submission #281192

#	Time	Username	Problem	Language	Result	Execution time	Memory
281192		AQT	Calvinball championship (CEOI15_teams)	C++14	80 / 100	1076 ms	42368 KiB

teams

#include <bits/stdc++.h>

using namespace std;

int N;
int arr[10005];
int dp[4005][10005];
const long long MOD = 1000007;

long long solve(int n, int m, bool border){
	if(n == N+1){
		return 1;
	}
	if(!border && n%3 == 0 && dp[n/3][m]){
		return dp[n/3][m];
	}
	int lim = m+1;
	if(border){
		lim = arr[n];
	}
	long long ans = 0;
	ans += 1LL * (lim-1) * solve(n+1, m, 0);
	ans += solve(n+1, max(lim, m), border);
	ans %= MOD;
	if(!border && n%3 == 0){
		dp[n/3][m] = ans;
	}
	return ans;
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin >> N;
	for(int i = 1; i<=N; i++){
		cin >> arr[i];
	}
	cout << solve(1, 0, 1);
}

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