Pagini recente » Cod sursa (job #1329077) | Cod sursa (job #722833) | Cod sursa (job #1471625) | Istoria paginii runda/infinity-2022-7/clasament | Cod sursa (job #3201853)
#include <fstream>
#include <vector>
#include <queue>
#include <limits>
using namespace std;
#define pii pair<int,int>
ifstream cin("dijkstra.in");
ofstream cout("dijkstra.out");
int n,m,i,x,y,c,d[50010],viz[50010];
struct cmp
{
bool operator()(pii x,pii y)
{
return x.second>y.second;
}
};
vector<pair<int,int>>v[50010];
priority_queue<pii,vector<pii>,cmp>q;
void dijkstra(int x)
{
int inf=2000000000;
int vecin,cost;
for(i=1; i<=n; i++)
d[i]=inf;
d[x]=0;
q.push({x,0});
while(!q.empty())
{
x=q.top().first;
q.pop();
if(viz[x]==1)
continue;
viz[x]=1;
for(auto it:v[x])
{
vecin=it.first;
cost=it.second;
if(d[vecin]>d[x]+cost)
{
d[vecin]=d[x]+cost;
q.push({vecin,d[x]+cost});
}
}
}
for(i=2; i<=n; i++)
if(d[i]==inf)cout<<"0 ";
else
cout << d[i]<<' ';
}
int main()
{
cin>>n>>m;
for(i=1; i<=m; i++)
{
cin>>x>>y>>c;
v[x].push_back({y,c});
}
dijkstra(1);
return 0;
}