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Cod sursa(job #605404)
#include <cstdio>
#include <cstring>
#include <queue>
#include <vector>
using namespace std;
#define PII pair <int, int>
#define pb push_back
#define mp make_pair
#define MAXN 50100
#define INF 1000000000
# define verf ++poz == hg ? fread ( ch, 1, hg, stdin ), poz = 0 : 0
const int hg = 1 << 13;
int poz, N, M, d[MAXN]; vector<int> G[MAXN], C[MAXN];
priority_queue <PII, vector <PII>, greater<PII> > T;
char ch[hg];
inline void cit ( int &x ) {
int semn = 1;
if ( ch[0] == '\0' ) fread ( ch, 1, hg, stdin ) ;
else for ( ; (ch[poz] < '0' || ch[poz] > '9') && ch[poz] != '-' ; verf ) ;
for ( x = 0 ; ch[poz] >= '0' && ch[poz] <= '9' || ch[poz] == '-' ; (ch[poz] == '-' ? semn = -1 : x = x * 10 + ch[poz] - '0'), verf ) ;
x *= semn;
}
void solve(void)
{
int i, j, k, val, x;
for(i = 2; i <= N; i++) d[i] = INF;
T.push( mp(0, 1) );
while( T.size() > 0 )
{
val = (T.top()).first, x = (T.top()).second;
T.pop();
for(i = 0; i < G[x].size(); i++)
if(d[ G[x][i] ] > val + C[x][i] )
d[ G[x][i] ] = val + C[x][i], T.push(mp(d[G[x][i]],G[x][i]));
}
}
int main(void)
{
freopen("dijkstra.in", "rt", stdin);
freopen("dijkstra.out", "wt", stdout);
int i, a, b, c;
cit (N), cit (M);
for(i = 1; i <= M; i++)
cit (a), cit (b), cit (c), G[a].pb(b), C[a].pb(c);
solve();
for(i = 2; i <= N; i++)
printf("%d ", d[i] == INF ? 0 : d[i]);
return 0;
}