Submission #559429

#	Time	Username	Problem	Language	Result	Execution time	Memory
559429		groshi	Calvinball championship (CEOI15_teams)	C++17	100 / 100	681 ms	616 KiB

teams

#include<iostream>

using namespace std;
int t[200000];
int mod=1e6+7;
long long dp[2][200000];
int maxx[200000];
int main()
{
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(0);
    int n;
    cin>>n;
    for(int i=1;i<=n;i++)
        cin>>t[i];
    for(int i=1;i<=n;i++)
        dp[0][i]=1;
    long long wynik=1;
    for(int i=1;i<=n;i++)
        maxx[i]=max(maxx[i-1],t[i]);
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
            dp[i%2][j]=(j*dp[(i-1)%2][j]+dp[(i-1)%2][j+1])%mod;
        wynik+=(t[n-i+1]-1)*dp[(i-1)%2][maxx[n-i]];
        wynik%=mod;
    }
    cout<<wynik;
    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