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Submission #527353

# Submission time Handle Problem Language Result Execution time Memory
527353 2022-02-17T09:25:11 Z beepbeepsheep Calvinball championship (CEOI15_teams) C++17
100 / 100
 577 ms 672 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define ii pair<ll,ll>
#define endl '\n'
const ll inf=1e15;
const ll mod=1e6+7;
const ll maxn=10005;

ll dp[maxn],nxt[maxn],arr[maxn],pref[maxn];
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    ll n,ans=0;
    cin>>n;
    for (int i=1;i<=n;i++){
        cin>>arr[i];
        dp[i]=1;
        pref[i]=max(arr[i],pref[i-1]);
    }
    for (int i=n;i>=1;i--){
        for (int j=1;j<maxn-1;j++){
            nxt[j]=(dp[j]*(j))%mod+dp[j+1];
            nxt[j]%=mod;
        }
        for (int j=1;j<arr[i];j++){
            ans+=dp[max<ll>(j,pref[i-1])];
            ans%=mod;
        }
        swap(dp,nxt);
    }
    cout<<(ans+1)%mod;
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 448 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 460 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 460 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 448 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 460 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 448 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 460 KB Output is correct
2 Correct 4 ms 484 KB Output is correct
3 Correct 4 ms 452 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 460 KB Output is correct
2 Correct 19 ms 460 KB Output is correct
3 Correct 22 ms 488 KB Output is correct

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 488 KB Output is correct
2 Correct 38 ms 480 KB Output is correct
3 Correct 41 ms 460 KB Output is correct

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 545 ms 656 KB Output is correct

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 181 ms 556 KB Output is correct
2 Correct 211 ms 560 KB Output is correct
3 Correct 226 ms 572 KB Output is correct

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 374 ms 652 KB Output is correct
2 Correct 358 ms 640 KB Output is correct
3 Correct 577 ms 672 KB Output is correct