#include <iostream>
using namespace std;
int f(int *a,int d) {
if (d < 4)
return f(a+1,d+1) *10+*a;
return 0;
}
int main()
{
int p[] = {3,2,1,6,5,4};
cout << f(p+1, 0);
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKaW50IGYoaW50ICphLGludCBkKSB7CmlmIChkIDwgNCkKICAgIHJldHVybiBmKGErMSxkKzEpICoxMCsqYTsKcmV0dXJuIDA7Cn0KCmludCBtYWluKCkKewppbnQgcFtdID0gezMsMiwxLDYsNSw0fTsKY291dCA8PCBmKHArMSwgMCk7CnJldHVybiAwOwp9IA==