Pagini recente » Cod sursa (job #1438755) | Cod sursa (job #910208) | Cod sursa (job #2588200) | Cod sursa (job #1647080) | Cod sursa (job #2812242)
#include <iostream>
#include <set>
#include <vector>
#define NMAX 50005
#define INF ((1 << 30) - 1)
using namespace std;
typedef pair<int, int> pii;
int n, m, ans[NMAX];
vector<pii> adj[NMAX];
set<pii> st;
void dij(const int SN = 1) {
ans[SN] = 0;
st.insert({0, SN});
while(!st.empty()) {
const int crt = (*st.begin()).second;
st.erase(st.begin());
for(const auto &el : adj[crt]) {
const int ncrt = el.first;
if(ans[ncrt] > ans[crt] + el.second) {
if(ans[ncrt] != INF)
st.erase(st.find({ans[ncrt], ncrt}));
ans[ncrt] = ans[crt] + el.second;
st.insert({ans[ncrt], ncrt});
}
}
}
}
int main()
{
freopen("dijkstra.in", "r", stdin);
freopen("dijkstra.out", "w", stdout);
scanf("%d%d", &n, &m);
for(int i = 1; i <= n; ++i)
ans[i] = INF;
for(int x, y, z; m; --m) {
scanf("%d%d%d", &x, &y, &z);
adj[x].push_back({y, z});
}
dij();
for(int i = 2; i <= n; ++i) printf("%d ", (ans[i] == INF ? 0 : ans[i]));
return 0;
}