Submission #746904

#	Time	Username	Problem	Language	Result	Execution time	Memory
746904		vjudge1	Calvinball championship (CEOI15_teams)	C++17	0 / 100	32 ms	65540 KiB

teams

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define int long long
#define endl '\n'
using namespace std;
using namespace __gnu_pbds;
using ordered_set = tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>;
int SLV[10001][10001];
int slv(int a,int b){
    if(b==0)return 1;
    if(SLV[a][b]!=-1)return SLV[a][b];
    return SLV[a][b]=(slv(a+1,b-1)+slv(a,b-1)*a)%1000000007;
}
signed main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    memset(SLV,-1,sizeof SLV);
    int n;
    cin>>n;
    int arr[n];
    for(auto &i:arr)cin>>i;
    int ans=1;
    int pw[n+1];
    pw[0]=1;
    for(int i=1;i<=n;i++)pw[i]=(pw[i-1]*2)%1000000007;
    for(int i=0;i<n;i++){
        for(int w=1;w<arr[i];w++)ans+=slv(w,n-i-1);
        ans%=1000000007;
    }
    cout<<ans;
}

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• Subtask 10: 0 / 10