31 lines
633 B
C++
31 lines
633 B
C++
#include<iostream>
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#include<cstdio>
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#include<cstring>
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using namespace std;
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const int N=205;
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const int M=22;
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__int64 a[N][N][M],b[N][N][M];
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void init()
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{
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int i,l,j;
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memset(a,0,sizeof(a));
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memset(b,0,sizeof(b));
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a[1][0][1]=1;
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b[1][1][1]=1;
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for(i=2;i<=200;i++)
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for(l=0;l<=i;l++)
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for(j=1;j<=i && j<=20;j++)
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{
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a[i][l][j]=a[i-1][l][j]+b[i-1][l][j-1];
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if(l) b[i][l][j]=a[i-1][l-1][j-1]+b[i-1][l-1][j];
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}
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}
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int main()
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{
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init();
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int n,m,k;
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while(scanf("%d%d%d",&n,&m,&k)!=-1)
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printf("%I64d\n",a[n][m][k]+b[n][m][k]);
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return 0;
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}
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