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Cod sursa(job #838268)
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <iostream>
#include <queue>
#include <vector>
using namespace std;
const int MAXN = 50100;
const int INF = (int)(1e9 + 7);
int n, m;
int d[MAXN];
bool viz[MAXN];
priority_queue<pair<int, int>, vector<pair<int, int> >, greater<pair<int, int> > > pq;
vector<int> G[MAXN], C[MAXN];
void dijkstra()
{
for (int i = 2; i <= n; ++i)
d[i] = INF;
pq.push(make_pair(0, 1));
while (!pq.empty()) {
int x = pq.top().second;
int val = pq.top().first;
pq.pop();
if (viz[x]) continue;
viz[x] = true;
for (size_t i = 0; i < G[x].size(); ++i)
if (C[x][i] + val < d[G[x][i]]) {
d[G[x][i]] = val + C[x][i];
pq.push(make_pair(d[G[x][i]], G[x][i]));
}
}
}
int main()
{
freopen("dijkstra.in", "r", stdin);
freopen("dijkstra.out", "w", stdout);
scanf("%d %d", &n, &m);
for (int i = 1; i <= m; ++i) {
int a, b, c;
scanf("%d %d %d", &a, &b, &c);
G[a].push_back(b);
C[a].push_back(c);
}
dijkstra();
for (int i = 2; i <= n; ++i)
printf("%d ", d[i] >= INF ? 0 : d[i]);
printf("\n");
return 0;
}