Pagini recente » Istoria paginii runda/sal | Istoria paginii runda/oni2018ziua1 | Istoria paginii runda/detest1/clasament | Istoria paginii runda/rar92 | Cod sursa (job #2401085)
#include <cstdio>
#include <queue>
#include <vector>
#define INF 9999999
using namespace std;
int n,m,D[50002];
vector < pair < int, int > > L[50002];
priority_queue < pair < int, int > > Heap;
void Dijkstra(int start)
{
int node,cost,info1,info2,sizeVecini;
for(int i=1;i<=n;i++)
D[i] = INF;
D[start] = 1;
Heap.push(make_pair(0, start));
while(!Heap.empty())
{
cost = -Heap.top().first;
node = Heap.top().second;
Heap.pop();
if(cost <= D[node])
{
sizeVecini = L[node].size();
for(int i=0;i<sizeVecini;i++)
{
info1 = L[node][i].first;
info2 = L[node][i].second;
if(D[info1] > cost + info2)
{
D[info1] = cost + info2;
//Heap.push({-D[info1], info1});
Heap.push(make_pair(-D[info1], info1));
}
}
}
}
}
int main()
{
FILE *f = fopen("dijkstra.in","r");
FILE *g = fopen("dijkstra.out","w");
fscanf(f,"%d %d",&n,&m);
int a,b,c;
for(int i=1;i<=m;i++)
{
fscanf(f,"%d %d %d",&a,&b,&c);
L[a].push_back({b,c});
}
//printf("crapa");
Dijkstra(1);
//printf("crapa2");
for(int i=2;i<=n;i++)
{
if(D[i] != INF)
fprintf(g,"%d ",D[i]);
else
fprintf(g,"0 ");
}
return 0;
}