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Cod sursa(job #192880)
#include <cstdio>
#include <set>
#include <vector>
#include <utility>
#define Nmax 50001
#define nod first
#define cost second
using namespace std;
vector< int > d;
vector< vector< pair< int,int > > > g(Nmax, vector< pair< int,int > >() );
struct compare{ bool operator()( int x, int y ) { return d[x] < d[y]; } };
set< int, compare> Q;
int N, M, x, y, z, i;
int main()
{
freopen("dijkstra.in", "r", stdin);
scanf("%d %d\n", &N, &M);
for(; M; --M)
{
scanf("%d %d %d\n", &x, &y, &z);
g[x].push_back(make_pair(y,z));
}
d.assign(N+1,0x3f3f3f3f);
d[1]=0;
Q.insert(1);
while (!Q.empty())
{
x = *Q.begin();
Q.erase(Q.begin());
for (vector< pair< int,int > >::iterator it = g[x].begin(); it != g[x].end(); ++it)
if (d[it->nod] > d[x] + it->cost)
{
if(Q.find(it->nod) != Q.end()) Q.erase(it->nod);
d[it->nod] = d[x] + it->cost;
Q.insert(it->nod);
}
}
for (i = 2, freopen("dijkstra.out", "w", stdout); i<=N; ++i) printf("%d ", d[i] == 0x3f3f3f3f ? 0 : d[i]);
return 0;
}