Pagini recente » Cod sursa (job #2115366) | Cod sursa (job #3261452) | Cod sursa (job #1646054) | Cod sursa (job #2139814) | Cod sursa (job #1488360)
#include <queue>
#include <fstream>
#include <vector>
#include <cstring>
using namespace std;
vector<pair<int,int>> g[50001];
int d[50001];
struct DereferenceCompareNode
{
bool operator()(const pair<int, int>& lhs, const pair<int, int>& rhs) const
{
return lhs.second < rhs.second;
}
};
void dijk(){
int x;
d[1] = 0;
priority_queue<pair<int, int>,vector<pair<int,int>>,DereferenceCompareNode> q;
q.push(pair<int, int>(1, 0));
while (!q.empty()){
x = q.top().first;
q.pop();
for (auto& i : g[x])
if (d[i.first]<0 || d[i.first]>d[x] + i.second){
d[i.first] = d[x] + i.second;
q.push(i);
}
}
}
int main(){
ifstream f("dijkstra.in");
ofstream of("dijkstra.out");
int a, b, c,N,M;
memset(d, -1, sizeof(d));
f >> N >> M;
for (int i = 0; i < M; ++i){
f >> a >> b >> c;
g[a].push_back(pair<int, int>(b, c));
}
dijk();
for (int i = 2; i <= N; ++i)
of << d[i] << " ";
}