Submission #44256

#	Time	Username	Problem	Language	Result	Execution time	Memory
44256		iletavcioski	Calvinball championship (CEOI15_teams)	C++17	10 / 100	396 ms	928 KiB

teams

#include <iostream>
#include <vector>
using namespace std;
typedef long long ll;
const ll mod = 1000007;
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie();
    cout.tie();
    int n;
    cin>>n;
    vector<ll> dp(n+1,0);
    vector<ll> dp2(n+1,0);
    dp[1]=2;
    ll broj=2;
    vector<ll> v;
    ll brojac=0;
    for(int i=0;i<n;i++)
    {
        ll a;
        cin>>a;
        v.push_back(a);
    }
    dp[1]=2;
    dp2[1]=2;
    for(int i=2;i<=n;i++)
    {
        broj++;
        broj%=mod;
        dp[i]=broj;
        dp[i]%=mod;
        dp2[i]=dp2[i-1]+broj;
        dp2[i]%=mod;
    }
    for(int i=n-1;i>=1;i--)
    {
        brojac+=dp2[v[i-1]-1];
        brojac%=mod;
        dp[1]=dp[1]+dp[2];
        dp[1]%=mod;
        dp2[1]=dp[1];
        broj=dp[1];
        for(int j=2;j<i;j++)
        {
            broj+=dp[j+1];
            broj%=mod;
            dp[j]=0;
            dp[j]=broj;
            dp[j]%=mod;
            dp2[j]=dp2[j-1]+dp[j];
            dp2[j]%=mod;
        }
    }
    brojac+=v[n-1];
    brojac%=mod;
    cout<<brojac<<endl;
    return 0;
}

• 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