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#include <iostream>
#include<fstream>
using namespace std;
int a[5][5],t,cost,x,y,k,newc,i;
void dei(int cadran,int lev)
{
t=(1<<lev);
if(x>t&&y>t) {newc=3;x-=t;y-=t;}
if(x<=t&&y<=t) {newc=1;}
if(x>t&&y<=t) {newc=4;x-=t;}
if(x<=t&&y>t) {newc=2;y-=t;}
cost+=t*t*a[cadran][newc];
if(lev>0) dei(newc,lev-1);
}
int main()
{
ifstream f("fractal.in");
ofstream g("fractal.out");
f>>k>>x>>y;
int unu[]={-1,0,3,2,1};
int doi[]={-1,0,1,2,3};
int trei[]={-1,2,1,0,3};
for(i=1;i<=4;i++)
a[1][i]=unu[i];
for(i=1;i<=4;i++)
{
a[2][i]=doi[i];
a[3][i]=doi[i];
}
for(i=1;i<=4;i++)
a[4][i]=trei[i];
dei(2,k-1);
g<<cost;
return 0;
}