Pagini recente » Cod sursa (job #724233) | Cod sursa (job #1784054) | Cod sursa (job #82934) | Cod sursa (job #784813) | Cod sursa (job #1477518)
/**
* Code by Patrick Sava
* "Spiru Haret" National College of Bucharest
**/
# include "fstream"
# include "cstring"
# include "vector"
# include "queue"
# include "bitset"
# include "algorithm"
# include "map"
# include "unordered_map"
# include "deque"
# include "string"
# include "iomanip"
# include "cmath"
# include "stack"
# include "cassert"
const char IN [ ] = "bfs.in" ;
const char OUT [ ] = "bfs.out" ;
const int MAX = 100999 ;
# define pb push_back
# define mp make_pair
# define FORN( a , b , c ) for ( int a = b ; a <= c ; ++ a )
# define FORNBACK( a , b , c ) for ( int a = b ; a >= c ; -- a )
using namespace std ;
ifstream cin ( IN ) ;
ofstream cout ( OUT ) ;
vector < int > gr [ MAX ] ;
queue < int > Q ;
int dist [ MAX ] ;
int main()
{
int n , m , s ;
cin >> n >> m >> s ;
while ( m -- )
{
int x , y ;
cin >> x >> y ;
gr [ x ].pb ( y ) ;
}
FORN ( i , 1 , n ) dist [ i ] = 1 << 30 ;
Q.push ( s ) ;
dist [ s ] = 0 ;
while ( !Q.empty() )
{
int nod = Q.front() ;
Q.pop() ;
for ( auto x : gr [ nod ] )
{
if ( dist [ x ] > dist [ nod ] + 1 )
{
dist [ x ] = dist [ nod ] + 1 ;
Q.push ( x ) ;
}
}
}
FORN ( i , 1 , n )
if ( dist [ i ] == 1 << 30 )
cout << -1 << ' ' ;
else cout << dist [ i ] << ' ' ;
return 0;
}