#include
long muti(long n,long m);
int main()
{
printf("%ld",muti(1000,1000));

return 0;

}

long muti(long n,long m)
{
if(n==1) return m;
else
{
if(n%2==0)
{
return muti(n>>1,m1,m1,m[......]

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