[模板]SPFA

 1 pt.push(pn);dt[0][1]=0;
 2 while(!pt.empty()){
 3     p pj;pj=pt.top();pt.pop();ved[pj.ds][pj.np]=0;
 4     for(ll i=fir[pj.np];i;i=ls[i].l){
 5         if(search(pj.np,ls[i].e)+dt[pj.ds][pj.np]<dt[pj.ds][ls[i].e]){
 6             dt[pj.ds][ls[i].e]=search(pj.np,ls[i].e)+dt[pj.ds][pj.np];
 7             if(ved[pj.ds][ls[i].e]==0){
 8                 pn.ds=pj.ds;
 9                 pn.nd=dt[pj.ds][ls[i].e];
10                 pn.np=ls[i].e;
11                 pt.push(pn);
12             }
13             ved[pj.ds][i]=1;
14         }
15     }
16 }
View Code

 

posted @ 2019-07-07 06:11  DeepinC  阅读(71)  评论(0编辑  收藏  举报