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Submission #69076

# Submission time Handle Problem Language Result Execution time Memory
69076 2018-08-19T21:56:00 Z Bodo171 Calvinball championship (CEOI15_teams) C++14
100 / 100
 991 ms 1308 KB 
/* Will you ever win? */

#include <iostream>
#include <fstream>
using namespace std;
const int nmax=10005;
const long long mod=1000*1000+7;
long long c[2][nmax],bell[nmax],mx[nmax],pw[nmax];
long long ans;
int v[nmax];
int n,i,j,use;
int main()
{
   // freopen("data.in","r",stdin);
    ios_base::sync_with_stdio(false);
    cin>>n;
    for(i=1;i<=n;i++)
    {
        cin>>v[i];
        mx[i]=max(mx[i-1],1LL*v[i]);
    }
    bell[0]=1;
    ans=v[n]-1;c[0][0]=1;
    for(i=1;i<n;i++)
    {
        use=1-use;
        c[use][0]=1;
        for(j=1;j<=i;j++)
        {
            c[use][j]=(c[1-use][j]+c[1-use][j-1])%mod;
        }
        pw[0]=v[n-i]-1;
        for(j=1;j<=i;j++)
            pw[j]=(1LL*pw[j-1]*mx[n-i-1])%mod;
        for(j=0;j<i;j++)
        {
            bell[i]=(1LL*bell[i]+(bell[j]*c[1-use][j]))%mod;
        }
        for(j=0;j<=i;j++)
            ans=(ans+1LL*(bell[i-j]*c[use][j])*pw[j])%mod;
    }
    cout<<(ans+1)%mod;
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 484 KB Output is correct
3 Correct 3 ms 484 KB Output is correct
4 Correct 2 ms 592 KB Output is correct
5 Correct 3 ms 592 KB Output is correct
6 Correct 3 ms 592 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 592 KB Output is correct
2 Correct 3 ms 592 KB Output is correct
3 Correct 2 ms 592 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 592 KB Output is correct
2 Correct 2 ms 616 KB Output is correct
3 Correct 2 ms 616 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 620 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 620 KB Output is correct
2 Correct 2 ms 624 KB Output is correct
3 Correct 2 ms 624 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 624 KB Output is correct
2 Correct 5 ms 624 KB Output is correct
3 Correct 5 ms 624 KB Output is correct

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 624 KB Output is correct
2 Correct 14 ms 624 KB Output is correct
3 Correct 12 ms 624 KB Output is correct

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 968 ms 1056 KB Output is correct

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 248 ms 1056 KB Output is correct
2 Correct 247 ms 1056 KB Output is correct
3 Correct 243 ms 1056 KB Output is correct

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 986 ms 1104 KB Output is correct
2 Correct 991 ms 1260 KB Output is correct
3 Correct 961 ms 1308 KB Output is correct