Submission #207842

#	Time	Username	Problem	Language	Result	Execution time	Memory
207842		stefdasca	Calvinball championship (CEOI15_teams)	C++14	100 / 100	251 ms	508 KiB

teams

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

const int mod = 1000007;

int n, v[10002];
int dp[2][10002];

int add(int a, int b)
{
    int ans = a+b;
    if(ans >= mod)
        ans -= mod;
    return ans;
}
long long mul(long long a, long long b)
{
    return (a * b) % mod;
}
int main()
{
    cin >> n;
    int maxi = 1;
    for(int i = 1; i <= n; ++i)
    {
        cin >> v[i];
        dp[1][max(v[i], maxi) - (v[i] > maxi)] = v[i] - 1;
        maxi = max(maxi, v[i]);
        for(int j = 1; j <= i; ++j)
        {
            dp[1][j] = add(dp[1][j], mul(dp[0][j], j));
            dp[1][j+1] = add(dp[1][j+1], dp[0][j]);
        }
        memcpy(dp[0], dp[1], sizeof(dp[1]));
        memset(dp[1], 0, sizeof(dp[1]));
    }
    int sum = 1;
    for(int i = 1; i <= n; ++i)
        sum = add(sum, dp[0][i]);
    cout << sum;
    return 0;
}

• 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: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10