29 lines
448 B
C++
29 lines
448 B
C++
#include <iostream>
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#include <cstdlib>
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#include <cstring>
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using namespace std;
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const int M = 32768 + 10;
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int dp[M];
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int main()
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{
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int n;
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while (~scanf("%d", &n))
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{
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memset(dp, 0, sizeof(dp));
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dp[0] = 1;
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for (int i = 1; i <= 3; i++)
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{
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for (int j = 1; j <= n; j++)
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{
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dp[j] += dp[j - i];
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}
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}
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printf("%d\n", dp[n]);
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}
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return 0;
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}
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