Submission #207668

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
207668	2020-03-08 13:12:38	alexandra_udristoiu	Calvinball championship (CEOI15_teams)	C++14	100 / 100	347 ms	608 KiB

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#include<iostream>
#define mod 1000007
using namespace std;
int n, t, i, j, k;
int d[2][10005], v[10005], maxim[10005];
int main(){
    cin>> n;
    for(i = 1; i <= n; i++){
        cin>> v[i];
        maxim[i] = max(maxim[i - 1], v[i]);
    }
    for(i = 1; i <= n; i++){
        d[0][i] = 1;
    }
    t = 1;
    for(i = n; i >= 2; i--){
        for(j = 1; j < i; j++){
            d[t][j] = d[1 - t][j + 1];
            d[t][j] = (d[t][j] + j * 1LL * d[1 - t][j]) % mod;
        }
        for(j = 1; j < v[i]; j++){
            k = (k + d[1 - t][ maxim[i - 1] ]) % mod;
        }
        t = 1 - t;
    }
    k = (1 + k) % mod;
    cout<< k;
}
 
 
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• 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