Submission #98399

#	Time	Username	Problem	Language	Result	Execution time	Memory
98399		someone_aa	Calvinball championship (CEOI15_teams)	C++17	10 / 100	3 ms	384 KiB

teams

#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define mp make_pair
using namespace std;
const int maxn = 20;
const ll mod = 1000007;
int dp[maxn][maxn];
int n, arr[maxn];

int count_pref(int st, int maxv, int limit) {
    memset(dp, 0, sizeof(dp));
    dp[st][maxv] = 1;
    if(maxv > limit) return 0;

    for(int i=st+1;i<=n;i++) {
        for(int j=maxv;j<=limit;j++) {
            ll temp = 1LL * (j * dp[i-1][j])%mod + dp[i-1][j-1];
            temp %= mod;
            dp[i][j] = temp;
        }
    }

    ll result = 0LL;
    for(int i=1;i<=limit;i++) {
        result += dp[n][i];
        result %= mod;
    }
    return result;
}

int main() {
    cin>>n;
    int maxv = 0;
    for(int i=1;i<=n;i++) {
        cin>>arr[i];
        maxv = max(maxv, arr[i]);
    }

    int value = 1;
    ll result = 0LL;
    for(int i=2;i<=n;i++) {
        for(int j=1;j<arr[i];j++) {
            value = max(value, j);
            result += count_pref(i, value, maxv);
            result %= mod;
        }
        value = max(value, arr[i]);
    }

    cout<<(result+1)%mod<<"\n";
    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