Cod sursa(job #1694677)

Utilizator ajeccAjechiloae Eugen ajecc Data 25 aprilie 2016 19:36:31
Problema Algoritmul lui Dijkstra Scor 60
Compilator cpp Status done
Runda Arhiva educationala Marime 2.06 kb
#include <bits/stdc++.h>
#define for0(i,n) for(int i=0; i<n; i++)
#define for1(i,n) for(int i=1; i<=n; i++)
#define pb push_back
#define mp make_pair
#define all(v) v.begin(), v.end()
#define V vector<int>
#define VP vector<pair<int, int> >
#define clr(A,x) memset(A, x, sizeof(A))
#define cpy(A,B) memcpy(A, B, sizeof(B))
#define g(s) getline(cin, s) ///ai grija la fin/cin ///
#define FASTIO ios_base::sync_with_stdio(0)
typedef long long ll;
typedef unsigned long long ull;
using namespace std;
/*template <typename T>
string to_string(const T& n){
    ostringstream os;
    os << n;
    return os.str();
}
*/

/*struct coord
{
    int x,y;

};
bool operator<(const coord &l, const coord &r)
{
    return (l.x<r.x || (l.x==r.x && l.y<r.y));
}*/

/*void invers_modular(int a, int b, int& d, int& x, int & y)
{
    if(!b)
    {
        d=a;
        x=1;
        y=0;
        return ;
    }
    int x0, y0;
    invers_modular(b, a%b, d, x0, y0);
    x=y0;
    y=x0-a/b*y0;
} // daca x<0 se aduna cu mod pana e mai mare, x fiind rezultatul*/

/*ull p(int baze, int exponent)
{
    if(exponent==0)
        return 1;

    if(exponent%2==0)
        return p(baze*baze, exponent/2);
    else return baze*p(baze, exponent-1);
}*/
ifstream fin("dijkstra.in"); /// modifica cu numele corespunzator
ofstream fout("dijkstra.out"); /// modifica cu numele corespunzator

int primul[50001], al_doilea[50001], dist[50001], sol[50001];

int main()
{
    int n, m;
    for(int i=2; i<=50000; i++)
        sol[i]=2100000000;
    fin>>n>>m;
    for1(i,m)
    {
        fin>>primul[i]>>al_doilea[i]>>dist[i];
        if(primul[i]==1)
            sol[al_doilea[i]]=dist[i];
    }
    bool ok;

    do
    {
        ok=0;
        for1(i,m)
            if(sol[al_doilea[i]]>sol[primul[i]]+dist[i])
            {
                sol[al_doilea[i]]=sol[primul[i]]+dist[i];
                ok=1;
            }
    }while(ok);

    for(int i=2; i<=n; i++)
        fout<<(sol[i]==2100000000?0:sol[i])<<' ';





    return 0;
}