Submission #728069

#	Time	Username	Problem	Language	Result	Execution time	Memory
728069		n0sk1ll	Calvinball championship (CEOI15_teams)	C++17	100 / 100	320 ms	480 KiB

teams

#include <bits/stdc++.h>

#define FAST ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);cerr.tie(0)
#define mp make_pair
#define xx first
#define yy second
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define all(x) x.begin(),x.end()
#define ff(i,a,b) for (int i = a; i < b; i++)
#define fff(i,a,b) for (int i = a; i <= b; i++)
#define bff(i,a,b) for (int i = b-1; i >= a; i--)
#define bfff(i,a,b) for (int i = b; i >= a; i--)

using namespace std;
long double typedef ld;
unsigned int typedef ui;
long long int typedef li;
pair<int,int> typedef pii;
pair<li,li> typedef pli;
pair<ld,ld> typedef pld;
vector<vector<int>> typedef graph;
unsigned long long int typedef ull;
//const int mod = 998244353;
//const int mod = 1000000007;







//Note to self: Check for overflow

const int mod=1000007;

int niz[10004];

int dp[10004];

int main()
{
    FAST;

    int n; cin>>n;
    fff(i,1,n) cin>>niz[i];

    int dosad=1;
    fff(i,2,n)
    {
        bfff(j,1,n) dp[j]=((li)dp[j]*j%mod+dp[j-1])%mod;
        (dp[dosad]+=niz[i]-1)%=mod; dosad=max(dosad,niz[i]);
    }

    int ans=1;
    fff(i,1,n) (ans+=dp[i])%=mod;
    cout<<ans<<"\n";
}

//Note to self: Check for overflow

• 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