24 lines
650 B
C++
24 lines
650 B
C++
#include <bits/stdc++.h>
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using namespace std;
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typedef long long LL;
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const int N = 30;
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const int M = 1e4 + 10;
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LL f[N][M];
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int w[N];
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int main() {
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int n, m;
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scanf("%d%d", &n, &m);
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for (int i = 1; i <= n; i++) scanf("%d", &w[i]);
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f[0][0] = 1; // 使用0种货币，凑0元钱,也是一种方案。可以理解为是超级源点，有了它，每个基础货币价格才成为合法~
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for (int i = 1; i <= n; i++)
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for (int j = 0; j <= m; j++) {
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for (int k = 0; k * w[i] <= j; k++)
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f[i][j] += f[i - 1][j - k * w[i]];
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}
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printf("%lld\n", f[n][m]);
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return 0;
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}
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