Pagini recente » Cod sursa (job #1103196) | Cod sursa (job #1011184) | Cod sursa (job #2221018) | Cod sursa (job #1438305) | Cod sursa (job #2819220)
#include <bits/stdc++.h>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
const int MAXN = 100001;
const int INF = 1e9;
typedef pair<int, int> PII;
int n, m, x, y, z, d[MAXN];
priority_queue <PII, vector<PII>, greater<PII>> PQ;
vector <PII> G[MAXN];
void Dijkstra(int start) {
for(int i = 1; i <= n; i++)
d[i] = INF;
d[start] = 0;
PQ.push({0, start});
while(!PQ.empty()) {
int dist = PQ.top().first;
int node = PQ.top().second;
PQ.pop();
if(dist > d[node])
continue;
for(auto nxt : G[node])
if(d[nxt.first] > dist + nxt.second) {
d[nxt.first] = dist + nxt.second;
PQ.push({d[nxt.first], nxt.first});
}
}
}
int main() {
fin >> n >> m;
for(int i = 1; i <= m; i++) {
fin >> x >> y >> z;
G[x].push_back({y, z});
}
Dijkstra(1);
for(int i = 2; i <= n; i++)
fout << (d[i] == INF ? 0 : d[i]) << " ";
fout << "\n";
return 0;
}