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#include <bits/stdc++.h>
using namespace std;

#define FOR(i, a, b) for(int i = (a); i <= (b); ++i)
#define REP(i, n) for(int i = 0; i < (n); ++i)
#define ff first
#define ss second

using ll = long long;
using pii = pair<int, int>;

template<class T> int size(T && a) {
	return (int)(a.size());
}
ostream& operator << (ostream &os, string str) {
    for(char c : str) os << c;
    return os;
}
template <class A, class B> ostream& operator << (ostream &os, const pair<A, B> &p) {
	return os << '(' << p.ff << "," << p.ss << ')';
}
template <class T> auto operator << (ostream &os, T &&x) -> decltype(x.begin(), os) {
	os << '{';
	for(auto it = x.begin(); it != x.end(); ++it)
		os << *it << (it == prev(x.end()) ? "" : " ");
	return os << '}';
}
template <class T> ostream& operator << (ostream &os, vector<vector<T>> vec) {
    for(auto x : vec)
    	os << "\n  " << x;
    return os;
}
void dump() {}
template <class T, class... Args> void dump(T &&x, Args... args) {
    cerr << x << "; ";
    dump(args...);
}
#ifdef DEBUG
# define debug(x...) cerr << "[" #x "]: ", dump(x), cerr << '\n'
#else 
# define debug(...) 0
#endif

//--------------------------------------------------

const int MOD = int(1e9) + 7;
int add(int a, int b) {
	if(a+b >= MOD)
		return a+b-MOD;
	return a+b;
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);

	int n; cin >> n;

	vector<int> a(n);
	int sum = 0;
	REP(i, n) {
		cin >> a[i];
		sum += a[i];
	}
	sort(a.begin(), a.end());

	vector<int> dp(sum+1), prev_dp(sum+1);
	dp[0] = prev_dp[0] = 1;
	int temp = 0;
	REP(i, n) {
		FOR(k, a[i]-1, temp) {
			dp[k+a[i]] = add(dp[k+a[i]], prev_dp[k]);
		}
		temp += a[i];

		prev_dp = dp;
		debug(dp);
	}

	int ans = 0;
	FOR(k, 1, sum) 
		ans = add(ans, dp[k]);
	cout << ans << '\n';
}