제출 #386323

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
386323		FatihSolak	Calvinball championship (CEOI15_teams)	C++17	100 / 100	256 ms	620 KiB

teams

#include <bits/stdc++.h>
#define N 10005
#define mod 1000007
using namespace std;
long long dp[N];
int arr[N];
int maxi[N];
void solve(){
    int n;
    cin >> n;
    for(int i= 0;i<N;i++)dp[i] = 1;
    long long ans = 1;
    for(int i=1;i<=n;i++){
        cin >> arr[i];
        maxi[i+1] = max(maxi[i],arr[i]);
    }
    for(int i = 0;i<n;i++){ 
        ans = (ans + dp[maxi[n-i]] * (arr[n-i]-1))%mod;
        for(int j=1;j<n;j++){
            dp[j] = (dp[j] * j + dp[j+1] * (j != n-1)) %mod;
        }
    }
    cout << ans;
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    #ifdef Local
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
    #endif
    int t=1;
    //cin>>t;
    while(t--){
        solve();
    }
    #ifdef Local
    cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

• 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