func_code_string: #include <bits/stdc++.h>   using namespace std;   long long int fact[100010];   long long int ifact[100010];   long long int ncr(int n, int r) {     if (r < 0 || n < 0) return 0;     return (fact[n] * ifact[n - r] % 1000000007) * ifact[r] % 1000000007;   }   int A[10];   long long int dp[11][101];   int main() {     fact[0] = 1;     for (int i = 1; i < 100010; i++) fact[i] = (fact[i - 1] * i) % 1000000007;     ifact[0] = ifact[1] = 1;     for (int i = 2; i < 100010; i++)       ifact[i] =           (1000000007 - (1000000007 / i) * ifact[1000000007 % i] % 1000000007) %           1000000007;     for (int i = 1; i < 100010; i++)       ifact[i] = (ifact[i - 1] * ifact[i]) % 1000000007;     int N;     cin >> N;     for (int i = 0; i < 10; i++) cin >> A[i];     dp[10][0] = 1;     for (int i = 9; i >= 0; i--)       for (int j = A[i]; j <= N; j++)         for (int k = A[i]; k <= j; k++) {           int rem = (j - k) + (i > 0 ? 1 : 0);           int n = k, r = rem;           dp[i][j] =               (dp[i][j] + ncr(n + r - 1, r - 1) * dp[i + 1][j - k]) % 1000000007;         }     long long int total = 0;     for (int i = 1; i <= N; i++) total = (total + dp[0][i]) % 1000000007;     cout << total << endl;     return 0;   }   