xyz neterminat

#include <iostream>
#include <fstream>
#include <cmath>

using namespace std;

ifstream f("date.in");
ofstream g("date.out");

int main()
{
    int x,y,z,nr=1,i,nr2,c=0,xyz=0;
    f>>x>>y>>z;


    for (i=1;i<=x-1;i++)
    {
        nr=nr*10;
    }



i=1;
    do
    {
        y=y*10;
        i++;
    }
while (i<x);


i=1;

do
{
    z=z*10;
    i++;
}
while (i<x-1);


xyz=y+z;
g<<xyz;


    return 0;
}