Pagini recente » Cod sursa (job #2527989) | Cod sursa (job #433594) | Cod sursa (job #3005445) | Cod sursa (job #1476369) | Cod sursa (job #3276909)
#include <bits/stdc++.h>
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
struct drumuri{
int node,cost;
};
struct compare{
bool operator()(drumuri a,drumuri b){
return a.cost>b.cost;
}
};
int n,m,x,y,z,drum[50200];
vector <drumuri> edges[50200];
priority_queue <drumuri, vector<drumuri>, compare> pq;
void dijkstra()
{
for(int i=1; i<=n; i++)
drum[i]=INT_MAX;
drum[1]=0, pq.push({1,0});
while(!pq.empty())
{
drumuri x=pq.top();
pq.pop();
if(x.cost==drum[x.node])
for(auto y:edges[x.node])
if(x.cost+y.cost<drum[y.node])
drum[y.node]=x.cost+y.cost, pq.push({y.node,drum[y.node]});
}
}
int main()
{
f>>n>>m;
for(int i=1; i<=m; i++)
f>>x>>y>>z, edges[x].push_back({y,z});
dijkstra();
for(int i=2; i<=n; i++)
if(drum[i]==INT_MAX)
g<<0<<' ';
else
g<<drum[i]<<' ';
return 0;
}