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Cod sursa(job #357107)
#include <cstdio>
#include <vector>
#include <bitset>
#include <queue>
using namespace std;
#define MAX_N 50005
#define INF 0x3f3f3f3f
#define foreach(V) for(typeof (V).begin() it = (V).begin(); it != (V).end(); ++it)
#define x first
#define c second
vector < pair<int, int> > G[MAX_N];
int D[MAX_N];
int N, M;
struct cmp
{
bool operator()(const int &a, const int &b)
{
return D[a] > D[b];
}
};
priority_queue <int, vector <int>, cmp> Q;
void citire()
{
scanf("%d %d",&N, &M);
while(M--)
{
int x, y, c;
scanf("%d %d %d",&x, &y, &c);
G[x].push_back( make_pair(y,c) );
}
}
void solve()
{
memset(D, INF, sizeof D);
bitset <MAX_N> inq;
inq[1] = 1;
D[1] = 0;
for(Q.push(1);!Q.empty(); Q.pop())
{
int nod = Q.top();
inq[nod] = 0;
foreach(G[nod])
if(D[it -> x] > D[nod] + it -> c)
{
D[it -> x] = D[nod] + it -> c;
if(!inq[it -> x])
{
Q.push(it -> x);
inq[it -> x] = 1;
}
}
}
for(int i = 2; i <= N; ++i)
if(D[i] == INF) printf("0 ");
else printf("%d ",D[i]);
}
int main()
{
freopen("dijkstra.in","rt",stdin);
freopen("dijkstra.out","wt",stdout);
citire();
solve();
}