#include
using namespace std;
int main()
{
int fn(int i);
int n,m,a,b;
cout<<"please input n,m.(n<=10000,2<=m<=10000)"<
b=fn(n);
while(n!=0&&m!=0)
{
if(b>=0)
a=b%m;
else
a=(b%m+m)%m;
}
cout< return 0;
}
int fn(int i)
{
int p;
if(i<=3)
p=i;
else
p=fn(i-1)+fn(i-3);
return p;
}