I saw this in TopCoder. But I can't understand what the f array show.
f[1][1] = 1;
for( i,2,n )
for( j,1,i )
f[i][j] = f[i-1][j-1] + j*f[i-1][j];
Is it Mathematical function? Can someone help?
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Name |
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Stirling numbers II
Thank you very much.
for(j,1,i) means for (int j=1; j<i; ++j) or with j<=i? And how f is initialised — everything in zeros?
j<=i
Such an absolutely wrong manner to ask questions.
I like ur username!
Such a cool username!!!