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Cod sursa(job #566454)
#include<fstream>
#include<queue>
#include<vector>
#include<bitset>
#include<cstring>
using namespace std;
const int Max_N = 50100;
const int INF = 0x3f3f3f3f;
//const char in[] = "dijkstra.in";
//const char out[]= "dijkstra.out";
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
#define pb push_back
vector<int>G[Max_N], C[Max_N];
queue<int>Q;
int dist[Max_N], N, M;
bool in_Q[Max_N];
int main()
{
//freopen(in,"r",stdin);
//freopen(out,"w",stdout);
//scanf("%d %d", &N, &M);
f>>N>>M;
memset(dist, INF, sizeof(dist));
int a, b, cost, x;
for(int i = 1 ; i <= M ; ++i)
//scanf("%d%d%d", &a, &b, &cost),
{
f>>a>>b>>cost;
G[a].pb(b);
C[a].pb(cost);}
dist[1] = 0, Q.push(1), in_Q[1] = true;
while( Q.size() )
{
x = Q.front();
Q.pop();
in_Q[x] = false;
for(int i = 0 ; i < G[x].size() ; ++i)
{
if(dist[G[x][i]] > dist[x] + C[x][i])
{
dist[G[x][i]] = dist[x] + C[x][i];
if(!in_Q[G[x][i]])
{
Q.push(G[x][i]);
in_Q[G[x][i]] = true;
}
}
}
}
for(int i = 2 ; i <= N ; ++i)
//printf("%d ", dist[i] == INF ? 0 : dist[i]);
g << (dist[i] == INF ? 0 : dist[i]) << ' ';
return 0;
}