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Cod sursa(job #386633)
#include <set>
#include <vector>
#include <fstream>
#include <iterator>
#include <algorithm>
#define inf 0x3f3f3f3f
#define mk make_pair< unsigned int, unsigned int >
/*
*
*/
using namespace std;
typedef unsigned int u;
typedef pair< u, u > pr;
vector< u > d;
set< pr > Q;
vector< vector< pr > > v;
vector< pr >::const_iterator it, iend;
set< pr >::iterator itmm;
int main()
{pr vertex;
u n, m, i, x, y, c;
ifstream in("dijkstra.in");
in>>n>>m;
v.resize(n);
for( i=0; i < m; ++i )
{
in>>x>>y>>c;
x-=1;
y-=1;
v[x].push_back( mk( y, c ) );
}
d.resize(n);
d.assign( n, inf );
Q.insert( mk( 0, 0 ) );
while( !Q.empty() )
{itmm=Q.begin();
vertex=*itmm;
Q.erase(itmm);
for( it=v[vertex.second].begin(), iend=v[vertex.second].end(); it < iend; ++it )
if( d[ it->first ] > it->second+vertex.first )
d[ it->first ]=it->second+vertex.first, Q.insert( mk( d[ it->first ], it->first ) );
}
replace( d.begin(), d.end(), inf, 0 );
ofstream out( "dijkstra.out" );
copy( d.begin()+1, d.end(), ostream_iterator<u>(out, " ") );
return 0;
}