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Cod sursa(job #186771)
#include <cstdio>
#include <cassert>
#include <vector>
#include <set>
#include <queue>
using namespace std;
const int N = 50000;
const int INF = 0x3f3f3f3f;
int n,m;
vector< pair<int,int> > g[N];
int d[N];
int r[N];
void dijkstra() {
set< pair<int, int> > s;
d[0] = 0;
for (int i = 1; i < n; ++i) d[i] = INF;
for (s.insert(make_pair(0,0)); !s.empty(); s.erase(s.begin())) {
int c = s.begin()->second;
vector< pair<int,int> > &cg = g[c];
for (int i = 0; i < cg.size(); ++i) {
int nd = d[c] + cg[i].second;
if (d[cg[i].first] > nd) {
if (d[cg[i].first] != INF) s.erase(s.find(make_pair(d[cg[i].first],cg[i].first)));
d[cg[i].first] = nd;
s.insert(make_pair(d[cg[i].first],cg[i].first));
}
}
}
}
int main() {
freopen("dijkstra.in","rt",stdin);
freopen("dijkstra.out","wt",stdout);
scanf("%d %d",&n,&m);
for (int i = 0; i < m; ++i) {
int a,b,c;
scanf("%d %d %d",&a,&b,&c);
--a; --b;
g[a].push_back(make_pair(b,c));
}
dijkstra();
/* for (int i = 1; i < n; ++i) printf("%4d ",i);
printf("\n");
for (int i = 1; i < n; ++i) printf("%4d ",(r[i]) ? 1 : -1);
printf("\n");
for (int i = 1; i < n; ++i) printf("%4d ",(d[i] == INF) ? 0 : d[i]);
printf("\n");*/
for (int i = 1; i < n; ++i) printf("%d ",(d[i] == INF) ? 0 : d[i]);
printf("\n");
return 0;
}