#include<cstdio>
#include<algorithm>
long long dp[51][5001][101];

int main(){
    int N;
    scanf("%d", &N);
    int A[N];
    for(int i = 0; i < N; ++i) scanf("%d", A + i);
    dp[0][0][0] = 1;
    for (int i = 0; i < N; i++)
    {
        for (int j = i; j >= 0; j--)
        {
            for (int k = 0; k <= i*100; k++)
            {
                for (int l = 0; l <= 100; l++)
                {
                    dp[j+1][k + A[i]][std::max(l, A[i])] += dp[j][k][l];
                }
            }
        }
    }
    long long answer = 0;
    for (int i = 2; i <= N; i++)
    {
        for (int j = 0; j*(i-1) <= 5000; j++)
        {
            for (int k = 0; k <= j && k <= 100; k++)
            {
                answer += dp[i][j*(i-1)][k];
            }
        }
    }
    printf("%lld\n", answer);
}