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Cod sursa(job #709687)
#include<stdio.h>
#include<vector>
#include<queue>
#define NMAX 50001
#define INF 9999999
using namespace std;
FILE *fin = fopen("dijkstra.in","r");
FILE *fout = fopen("dijkstra.out","w");
vector < pair < int,int > > v[NMAX];
queue < int > coada;
int n,m,i,j,d[NMAX];
void read()
{
int x,y,c;
fscanf(fin,"%d%d",&n,&m);
for(i=1;i<=m;i++)
{
fscanf(fin,"%d%d%d",&x,&y,&c);
v[x].push_back( make_pair (y,c));
v[y].push_back( make_pair (x,c));
}
}
void init()
{
for(i=1; i<=n ;i++)
d[i] = INF;
d[1] = 0;
}
void solve()
{
int nod;
coada.push(1);
while(!coada.empty())
{
nod = coada.front();
coada.pop();
for(j=0;j<v[nod].size();j++)
if(d[v[nod][j].first] > d[nod] + v[nod][j].second)
{
d[v[nod][j].first] = d[nod] + v[nod][j].second;
coada.push(v[nod][j].first);
}
}
for(i=2;i<=n;i++)
{
if(d[i] != INF)
fprintf(fout,"%d ",d[i]);
else
fprintf(fout,"%d ",0);
}
}
int main()
{
read();
init();
solve();
}