Pagini recente » Cod sursa (job #2339485) | Cod sursa (job #1310401) | Cod sursa (job #775895) | Cod sursa (job #113171) | Cod sursa (job #422283)
Cod sursa(job #422283)
#include<iostream>
#include<string>
#include<vector>
#include<queue>
#include<algorithm>
using namespace std;
#define NM 50005
#define inf 2000000000
#define PB push_back
#define MKP make_pair
int N,M,S,COST[NM];
vector<pair<int,int> > G[NM];
queue<int> Q;
char isin[NM];
int main()
{
int start=clock();
int a,b,c;
freopen("dijkstra.in","r",stdin);
freopen("dijkstra.out","w",stdout);
scanf("%d %d",&N,&M,&S);
S=1;
for(int i=1;i<=M;++i)
{
scanf("%d %d %d",&a,&b,&c);
G[a].PB(MKP(b,c));
}
for(int i=1;i<=N;++i)
COST[i]=inf;
COST[S]=0;
Q.push(S);
isin[S]=1;
while(!Q.empty())
{
int nod=Q.front();
Q.pop();
isin[nod]=0;
for(int i=0;i<G[nod].size();++i)
{
int nnod=G[nod][i].first;
int ncost=G[nod][i].second;
if(COST[nnod]>COST[nod]+ncost)
{
COST[nnod]=COST[nod]+ncost;
if(!isin[nnod])
{
Q.push(nnod);
isin[nnod]=1;
}
}
}
}
for(int i=2;i<=N;++i)
if(COST[i]==inf) printf("0 ");
else printf("%d ",COST[i]);
int stop=clock();
//printf("\n%lf",(double)(stop-start)/CLOCKS_PER_SEC);
return 0;
}