1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
#include <bits/stdc++.h>
using namespace std;

typedef long long LL;
typedef long double LD;
typedef pair<int, int> PII;
typedef pair<LL, LL> PLL;

#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()

template<typename _T> inline void _DBG(const char *s, _T x) { cerr << s << " = " << x << "\n"; }
template<typename _T, typename... args> void _DBG(const char *s, _T x, args... a) { while(*s != ',') cerr << *s++; cerr << " = " << x << ','; _DBG(s + 1, a...); }

#ifdef LOCAL
#define _upgrade ios_base::sync_with_stdio(0);
#define DBG(...) _DBG(#__VA_ARGS__, __VA_ARGS__)
#else
#define _upgrade ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define DBG(...) (__VA_ARGS__)
#define cerr if(0) cout
#endif

// ********************** CODE ********************** //

int main()
{
    _upgrade
    
    int n;
    cin >> n;
    vector<int> v(n);
    for(int i = 0; i < n; i++)
        cin >> v[i];
    sort(all(v));
    int m = 5005, M = 1e9 + 7;
    vector<int> dp(m + 1);
    dp[0] = 1;
    for(auto a: v)
        for(int i = m; i >= a - 1; i--)
            dp[min(i + a, m)] = (dp[min(i + a, m)] + dp[i]) % M;
    int ans = 0;
    for(auto x: dp)
        ans = (ans + x) % M;
    cout << (ans + M - 1) % M << "\n";

    return 0;
}