Pagini recente » Cod sursa (job #1356442) | Cod sursa (job #1884341) | Cod sursa (job #2642946) | Cod sursa (job #1570454) | Cod sursa (job #351044)
Cod sursa(job #351044)
/*
* File: main.cpp
* Author: speedemon
*
* Created on September 14, 2009, 2:58 PM
*/
#include <vector>
#include <fstream>
#include <cstdlib>
#include <iterator>
#include <algorithm>
#define Nmax 50001
/*
*
*/
using namespace std;
ifstream in;
ofstream out;
struct Nod
{
unsigned vertex,value;
Nod *next;
} *List[Nmax];
typedef vector<unsigned>::iterator iter;
vector<unsigned> dist,Q;
inline void Insert( unsigned x, unsigned y, unsigned c )
{
Nod *q;
q=(Nod*)malloc( sizeof(Nod) );
q->vertex=y; q->value=c;
q->next=List[x]; List[x]=q;
}
inline iter minim( iter a, iter b )
{
return dist[*a] < dist[*b] ? a : b;
}
inline iter binary_search( iter st, iter dr )
{
if( st == dr ) return st;
else if( st < dr )
{
iter m=st+(dr-st)/2;
return minim( binary_search( st, m ), binary_search( m+1, dr ) );
}
return Q.end();
}
int main()
{unsigned N,M,x,y,c,i,max=0;
Nod *p;
in.open("dijkstra.in");
in>>N>>M;
while( M-- )
{
in>>x>>y>>c;
Insert( x, y, c );
if( c > max ) max=c;
}
++max;
iter it,iend,imin;
for( i=1; i <= N; ++i ) Q.push_back(i),dist.push_back(max);
dist.push_back(max);
dist[1]=0;
while( !Q.empty() )
{
imin=binary_search( Q.begin(), Q.end() );
if( Q.end() == imin || max == dist[*imin] ) break;
for( p=List[*imin]; p; p=p->next )
{
if( dist[*imin] + p->value < dist[p->vertex] ) dist[p->vertex]=dist[*imin]+p->value;
}
Q.erase(imin);
}
out.open("dijkstra.out");
for( iend=dist.end(), it=dist.begin()+2; it < iend; ++it )
if( max == *it ) out<<"0 ";
else out<<*it<<' ';
return EXIT_SUCCESS;
}