#include <bits/stdc++.h>
#define gc getchar
#define gcu getchar_unlocked
#define fi first
#define se second
#define pb push_back
#define mod ((ll)1e9 + 7)
typedef long long ll;
using namespace std;
//===============================================================================================
int n, base = 1;
ll ans;
int a[10009];
ll d[100009];
//===============================================================================================
int main()
{
scanf("%d", &n);
while (base < 5000)
base <<= 1;
for (int i = 0; i < n; i++)
scanf("%d", &a[i]);
sort(a, a + n);
d[0] = 1;
for (int i = 0; i < n; i++)
{
d[5001] <<= 1;
d[5001] %= mod;
for (int j = 5000; j >= a[i] - 1; j--)
{
d[min(j + a[i], 5001)] += d[j];
d[min(j + a[i], 5001)] %= mod;
}
}
for (int i = 1; i <= 5001; i++)
{
ans += d[i];
ans %= mod;
}
printf("%lld\n", ans);
}
//===============================================================================================
// 5
// 2 7 4 4 1
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 | #include <bits/stdc++.h> #define gc getchar #define gcu getchar_unlocked #define fi first #define se second #define pb push_back #define mod ((ll)1e9 + 7) typedef long long ll; using namespace std; //=============================================================================================== int n, base = 1; ll ans; int a[10009]; ll d[100009]; //=============================================================================================== int main() { scanf("%d", &n); while (base < 5000) base <<= 1; for (int i = 0; i < n; i++) scanf("%d", &a[i]); sort(a, a + n); d[0] = 1; for (int i = 0; i < n; i++) { d[5001] <<= 1; d[5001] %= mod; for (int j = 5000; j >= a[i] - 1; j--) { d[min(j + a[i], 5001)] += d[j]; d[min(j + a[i], 5001)] %= mod; } } for (int i = 1; i <= 5001; i++) { ans += d[i]; ans %= mod; } printf("%lld\n", ans); } //=============================================================================================== // 5 // 2 7 4 4 1 |
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