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- #include <fstream>
- #define MOD 9973
- #define N 101
- using namespace std;
- ifstream f("calculsume.in");
- ofstream g("calculsume.out");
- int n,k,a[N],S[N][N];
- int main()
- {
- f>>n>>k;
- for(int i=1;i<=n;++i)
- f>>a[i];
- for(int i=0;i<=n;++i)
- S[i][0]=1;
- S[1][1]=a[1];
- for(int i=2;i<=n;++i)
- for(int j=1;j<=i;++j)
- S[i][j]=((a[i]*S[i-1][j-1])%MOD+S[i-1][j])%MOD;
- g<<S[n][k];
- return 0;
- }
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