Cod sursă (job #93606)

//Iisuse miluieste - ma
#include<fstream>
#define GOD 500000
using namespace std;
int main()
{
ifstream f("bart.in");
ofstream g("bart.out");
char p[ GOD ];
int pi[ GOD ] , k, i , q;
k = 0;
pi[ 0 ] = 0 ;
f>>p[ 0 ];
q = 1;
f>>p[ q ];
while(!f.eof())
     { 
     while(( k > 0 ) && ( p[ k ] != p[ q ]))
           k = pi[ k - 1 ];
     if( p[ k ] == p[ q ] )
        k ++;
     pi[ q ] = k;
     q ++;
     f>>p[ q ];
     }
for( i = 0 ; i < q - k ;i ++ )
    g<<p[ i ]; 
g.close();
return 0;
}