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Cod sursa(job #542625)
#include <cstdio>
const int maxn = 50001;
const int inf = 1 << 30;
FILE *in = fopen("dijkstra.in","r"), *out = fopen("dijkstra.out","w");
struct graf
{int nod, cost; graf *next;};
int n, m;
graf *a[maxn];
int d[maxn], q[maxn];
void add(int where, int what, int cost)
{ graf *q = new graf; q->nod = what; q->cost = cost; q->next = a[where]; a[where] = q;}
void read()
{ fscanf(in, "%d %d", &n, &m);
int x, y, z;
for ( int i = 1; i <= m; ++i ) {fscanf(in, "%d %d %d", &x, &y, &z); add(x, y, z);}
}
void dijkstra()
{ for ( int i = 2; i <= n; ++i ) d[i] = inf;
int min, pmin = 0;
for ( int i = 1; i <= n; ++i )
{ min = inf;
for ( int j = 1; j <= n; ++j ) if ( d[j] < min && !q[j] ) min = d[j], pmin = j;
q[pmin] = 1;
graf *t = a[pmin];
while ( t )
{ if ( d[ t->nod ] > d[pmin] + t->cost ) d[ t->nod ] = d[pmin] + t->cost;
t = t->next;
}
}
}
int main()
{ read();
dijkstra();
for( int i = 2; i <= n; ++i )fprintf(out, "%d ", d[i] == inf ? 0 : d[i]);
fprintf(out, "\n");
return 0;
}