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https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
37 lines
803 B
C++
37 lines
803 B
C++
#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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using namespace std;
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#define INF 0x3f3f3f3f
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#define MAXN 21
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int pool[MAXN][MAXN][MAXN];
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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) return pool[0][0][0];
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else if(a>20||b>20||c>20) return w(20,20,20);
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if(pool[a][b][c]!=INF) return pool[a][b][c];
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if(a<b&&b<c)
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{
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return pool[a][b][c]=w(a,b,c-1)+w(a,b-1,c-1)-w(a,b-1,c);
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}
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else
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{
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return pool[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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}
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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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int ans;
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while(scanf("%d %d %d",&a,&b,&c)==3&&!(a==-1&&b==-1&&c==-1))
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{
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memset(pool,0x3f,sizeof(int)*MAXN*MAXN*MAXN);
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pool[0][0][0]=1;
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ans=w(a,b,c);
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printf("w(%d, %d, %d) = %d\n",a,b,c,ans);
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}
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return 0;
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}
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