38 lines
842 B
C++
38 lines
842 B
C++
#include<iostream>
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using namespace std;
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int x[21][21][21]={0};
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int w(int a,int b,int c)
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{
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if(a<=0||b<=0||c<=0)
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return 1;
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if(x[a][b][c]!=0)
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return x[a][b][c];
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if(a<b&&b<c)
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{
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x[a][b][c]=w(a,b,c-1)+w(a,b-1,c-1)-w(a,b-1,c);
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return x[a][b][c];
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}
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else
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{
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x[a][b][c]=w(a-1,b,c)+w(a-1,b-1,c)+w(a-1,b,c-1)-w(a-1,b-1,c-1);
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return x[a][b][c];
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}
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}
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int main()
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{
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int a,b,c;
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while(cin>>a>>b>>c&&!(a==-1&&b==-1&&c==-1))
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{
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if(a<=0||b<=0||c<=0)
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{
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printf("w(%d, %d, %d) = %d\n",a,b,c,1);
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continue;
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}
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if(a>20||b>20||c>20)
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printf("w(%d, %d, %d) = %d\n",a,b,c,w(20,20,20));
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else
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printf("w(%d, %d, %d) = %d\n",a,b,c,w(a,b,c));
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}
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return 0;
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}
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