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#include<bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define ST first
#define ND second
#define PB push_back
#define SIZE(a) ((int)a.size())

template<class T, class U>
ostream& operator<<(ostream &stream, pair<T, U> &p) {
    stream << "(" << p.ST << "," << p.ND << ")";
    return stream;
}

template<class T>
ostream& operator<<(ostream &stream, vector<T> &v) {
    stream << "[";
    for(auto elem : v) {
        stream << elem << ", ";
    }
    stream << "]";
    return stream;
}

const int mod = 1e9+7;

int main() {
    ios_base::sync_with_stdio(0);
    int n;
    cin >> n;
    vector<int> a(n);
    int a_sum = 0;
    for(int &x : a) {
        cin >> x;
        a_sum+=x;
    }
    sort(a.begin(), a.end());
    vector<int> dp(a_sum+1);
    dp[0] = 1;
    int cum_sum = 0;
    for(int x : a) {
        cum_sum+= x;
        for(int i=cum_sum; i-x >= x-1; i--) {
            dp[i] = (dp[i]+dp[i-x])%mod;
        }
        // cout << dp << "\n";
    }
    int res=-1;
    for(int x : dp) {
        res = (res+x)%mod;
    }
    cout << (res+mod)%mod << "\n";
}