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Cod sursa(job #175473)
#include <cstdio>
#include <vector>
#include <queue>
#include <iterator>
using namespace std;
#define inf 0x3f3f3f
const int MAX_N = 50001;
vector<pair<int,int> > G[MAX_N];
vector<int> d, inq;
struct Comp
{
bool operator ()(int i, int j)
{
return d[i] < d[j];
}
};
priority_queue<int, vector<int>, Comp> Q;
int n, m;
void dijkstra()
{
vector<pair<int,int> >::iterator it;
int k;
d[1] = 0; Q.push(1); inq[1] = 1;
while (!Q.empty())
{
k = Q.top(); Q.pop(); inq[k] = 0;
for (it = G[k].begin(); it != G[k].end(); ++it)
if (d[it->first] > d[k] + it->second)
{
d[it->first] = d[k] + it->second;
if (!inq[it->first])
{
Q.push(it->first);
inq[it->first] = 1;
}
}
}
}
int main()
{
freopen("dijkstra.in","r",stdin);
freopen("dijkstra.out","w",stdout);
scanf("%d%d", &n, &m);
d.resize(n + 1); inq.resize(n + 1);
inq.assign(n + 1, 0);d.assign(n + 1, inf);
for (int i = 1; i <= m; ++i)
{
int x, y, c; scanf("%d%d%d", &x, &y, &c);
G[x].push_back(make_pair(y,c));
}
dijkstra();
for (int i = 2; i <= n; ++i)
printf("%d ", d[i] == inf ? 0 : d[i]);
return 0;
}