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Cod sursa(job #351833)
/*
* File: main.cpp
* Author: speedemon
*
* Created on September 14, 2009, 2:58 PM
*/
#include <vector>
#include <fstream>
#include <cstdlib>
#include <iterator>
#include <algorithm>
/*
*
*/
using namespace std;
ifstream in;
ofstream out;
struct Graph
{
unsigned vertex,value;
Graph *next;
} **List;
inline void Insert( int x, int y, int c )
{
Graph *q;
q=(Graph*)malloc( sizeof(Graph) );
q->vertex=y; q->value=c;
q->next=List[x]; List[x]=q;
}
int main()
{unsigned N,M,x,y,c,i,max;
Graph *p;
in.open("dijkstra.in");
in>>N>>M;
List=(Graph**)malloc((N+1)*sizeof(Graph));
while( M-- )
{
in>>x>>y>>c;
Insert( x, y, c );
if( List[x] ) List[x]=(Graph*)realloc( (void*)List[x], sizeof(*List[x])/sizeof(Graph) );
else List[x]=(Graph*)malloc(sizeof(Graph));
if( c > max ) max=c;
}
++max;
vector<unsigned> dist( N+1, max ),Q;
vector<unsigned>::iterator it,iend,imin;
dist[1]=0;
for( i=1; i <= N; ++i ) Q.push_back(i);
dist[1]=0;
while( !Q.empty() )
{
for( iend=Q.end(), imin=it=Q.begin(); it < iend; ++it )
if( dist[*imin] > dist[*it] ) imin=it;
if( 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;
}