Pagini recente » Cod sursa (job #2223951) | Cod sursa (job #3040048) | Cod sursa (job #2071280) | Cod sursa (job #1301442) | Cod sursa (job #739861)
Cod sursa(job #739861)
#include <cstdio>
#include <set>
#include <vector>
#define MAX 50001
#define INF 0xfffff
using namespace std;
vector<pair<int,int> >U[MAX];
set<pair<int,int> >S;
int n,m,C[MAX];
void dijkstra(){
int x,y,c;
for(int i=2;i<=n;i++)C[i]=INF;
S.insert(make_pair(0,1));
while(S.size()>0){
c=S.begin()->first;
x=S.begin()->second;
S.erase(S.begin());
for(int i=0;i<U[x].size();i++){
y=U[x][i].first;
if(C[y]>c+U[x][i].second){
C[y]=c+U[x][i].second;
S.insert(make_pair(c+U[x][i].second,y));
}
}
}
}
int main(){
int x,y,c;
freopen("dijkstra.in","r",stdin);
freopen("dijkstra.out","w",stdout);
scanf("%d %d",&n,&m);
for(int i=1;i<=m;i++){
scanf("%d %d %d",&x,&y,&c);
U[x].push_back(make_pair(y,c)); }
dijkstra();
for(int i=2;i<=n;i++)printf("%d ",C[i]==INF?0:C[i]);
}