Pagini recente » Cod sursa (job #2174937) | Cod sursa (job #2339088) | Cod sursa (job #380526) | Cod sursa (job #2254395) | Cod sursa (job #3235455)
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
#define INF 2100000000
struct road{
int end,cost;
};
vector <road> v[50001];
priority_queue <pair<int,int>, vector<pair<int,int>>, greater<pair<int,int>>> q;
int cost[50001];
int main()
{
int n,p;
f>>n>>p;
int x,y,c;
while(f>>x>>y>>c)
v[x].push_back({y,c});
for(int i=2;i<=n;i++)
cost[i]=INF;
q.push({0,1});
int cr=n;
while(!q.empty()&&cr)
{
int x=q.top().first,y=q.top().second; //cost,vf
if(x==cost[y]){
cr--;
for(auto i:v[y])
if(cost[i.end]>x+i.cost)
{cost[i.end]=x+i.cost; q.push({cost[i.end],i.end});}}
q.pop();
}
for(int i=2;i<=n;i++)
if(cost[i]!=INF)
g<<cost[i]<<" ";
else g<<0<<" ";
return 0;
}