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Cod sursa(job #868320)
#include <cstdio>
#include <cstdlib>
#include <queue>
#include <cstring>
#include <vector>
#include <algorithm>
using namespace std;
#define PI pair<int, int>
#define IT vector<PI> :: iterator
#define pb push_back
#define Inf 0x3f3f3f3f
#define mp make_pair
#define Nmax 50010
int N, M, X, Y, C, Dist[Nmax];
vector<PI> G[Nmax];
priority_queue<PI, vector<PI>, greater<PI> > Q;
void Dijkstra()
{
memset(Dist, Inf, sizeof(Dist));
Dist[1] = 0;
Q.push(mp(0, 1));
while(!Q.empty())
{
int Node = Q.top().second;
Q.pop();
bool Stop = true;
for(IT it = G[Node].begin(); it != G[Node].end(); ++it)
if(Dist[it -> first] > Dist[Node] + it -> second)
{
Stop = false;
Dist[it -> first] = Dist[Node] + it -> second;
Q.push(mp(Dist[it -> first], it -> first));
}
if(Stop) break;
}
}
int main()
{
freopen("dijkstra.in", "r", stdin);
freopen("dijkstra.out", "w", stdout);
scanf("%i %i", &N, &M);
for(int i = 1; i <= M; i++)
{
scanf("%i %i %i", &X, &Y, &C);
G[X].pb(mp(Y, C));
}
Dijkstra();
for(int i = 2; i <= N; i++) printf("%i ", (Dist[i] == Inf ? 0 : Dist[i]));
return 0;
}