Cod sursa(job #2028709)

Utilizator Rocamadour1497Alexandru Martiniuc Rocamadour1497 Data 28 septembrie 2017 14:36:59
Problema Algoritmul lui Dijkstra Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 2.9 kb
/** \brief
#include <set>
#include <vector>
#include <iostream>


std::vector<int> incrementalBackups(int lastBackupTime, std::vector<std::vector<int>> changes) {
   std::set<int> s;
    for(auto i=changes.begin();
       i!=changes.end();++i){
        if((*i)[0]>lastBackupTime)
            s.insert((*i)[1]);
    }
    std::vector<int> v;
    for(auto i=s.begin();i!=s.end();++i){
        v.push_back(*i);
    }
    return v;
}

int main(){
    std::vector<int> v=incrementalBackups(123,{{122,1},{124,2},{126,1},{121,6},{123,5},{128,9},{125,9}});
    for(auto i=v.begin();i!=v.end();++i)
        std::cout<<*i<<"  ";
}



#include <stdio.h>
#include <string.h>



int main(void) {

  // disable stdout buffering
  setvbuf(stdout, NULL, _IONBF, 0);

  // keep this function call here
  char* str[100];
  scanf("%s",str);
size_t last=strlen(*str);
  return 0;

}


#include <iostream>
#include <queue>
#include <vector>
#include <set>
#include <fstream>

using namespace std;

ifstream fin("bfs.in");
ofstream gout("bfs.out");

int n,m,s;
vector<int> g[1000001];
int viz[1000001];
int d[1000001];
void read()
{
    int x,y;
    fin>>n>>m>>s;
    x=m;
    for(;m;m--){
        fin>>x>>y;
        g[x].push_back(y);
    }
}
void bfs()
{
    queue<int> q;
    q.push(s);
    d[s]=1;
    while(!q.empty())
    {
        int f=q.front();
        q.pop();
        viz[f]=1;
        for(auto it=g[f].begin();it!=g[f].end();++it)
        {
            if(!viz[*it]){
                viz[*it]=1;
                q.push(*it);
                d[*it]=d[f]+1;
            }
        }
    }
    for(int i=1;i<=n;i++){
        gout<<d[i]-1<<" ";
    }

}
int main()
{

    read();
    bfs();
}
#include<stdio.h>



int main()
{
        int i=1;
        do
        {
                printf("%d\n",i);
                i++;
                if(i < 15)
                        continue;
        }while(false);
        return 0;
}

*/
#include <fstream>
#include <vector>
#include <utility>

using namespace std;
int n,m;
vector<pair<int,int>> g[50001];
ifstream cin("dijkstra.in");
ofstream cout("dijkstra.out");
void read()
{

    cin>>n>>m;
    while(m--){
        int x,y,z;
        cin>>x>>y>>z;
        g[x].push_back(make_pair(y,z));
    }
}
int d[50001];

void djk()
{
    read();
    for(int i=2;i<=n;i++) d[i]=3e4;
    for(int i=1;i<=n;i++)
    {
      for(auto it=g[i].begin();it!=g[i].end();++it)
      {
          if(d[i]+(*it).second<d[(*it).first])
            d[(*it).first]=d[i]+(*it).second;
      }
    }
    for(int i=2;i<=n;i++) cout<<d[i]<<" ";
}
int main()
{

    /** \brief
     read();
    for(int i=1;i<=n;i++)
    {
      for(auto it=g[i].begin();it!=g[i].end();++it)
      {
          cout<<(*it).first<<"       "<<(*it).second<<endl;
      }
      cout<<endl;
    }
     */

djk();


}