1 #include <bits/stdc++.h>
2 #define _for(i,a,b) for(int i = (a);i < b;i ++)
3 typedef long long ll;
4 using namespace std;
5 inline ll read()
6 {
7 ll ans = 0;
8 char ch = getchar(), last = ' ';
9 while(!isdigit(ch)) last = ch, ch = getchar();
10 while(isdigit(ch)) ans = (ans << 1) + (ans << 3) + ch - '0', ch = getchar();
11 if(last == '-') ans = -ans;
12 return ans;
13 }
14 inline void write(ll x)
15 {
16 if(x < 0) x = -x, putchar('-');
17 if(x >= 10) write(x / 10);
18 putchar(x % 10 + '0');
19 }
20 int N,M;
21 int a[101];
22 int dp[10003];
23 int main()
24 {
25 N = read(),M = read();
26 _for(i,0,N)
27 a[i] = read();
28 memset(dp,0,sizeof(dp));
29 dp[0] = 1;
30 _for(i,0,N)
31 for(int j = M;j >= 0;j --)
32 if(j>=a[i])
33 dp[j] += dp[j-a[i]];
34 write(dp[3]);
35 return 0;
36 }
