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Cod sursa(job #982669)
#include<stdio.h>
#include<string.h>
#include<vector>
#include<queue>
#define NMAX 100007
using namespace std;
int nr, n;
queue < int > q;
vector < int > v[NMAX];
int viz[NMAX], a[NMAX], Stack[NMAX], Ans[NMAX];
void dfs(int u)
{
Stack[++ Stack[0]] = u;
viz[u] = 1;
if(a[u])
Ans[u] = Ans[Stack[Stack[0] - a[u]]] + 1;
for(vector<int> :: iterator i = v[u].begin(); i != v[u].end(); ++ i)
if(! viz[*i])
dfs(*i);
-- Stack[0];
}
int main(){
int x = 0, y = 0;
freopen("cerere.in", "r", stdin);
freopen("cerere.out", "w", stdout);
scanf("%d", &n);
for(int i = 1; i <= n; ++ i)
scanf("%d", &a[i]);
for(int i = 1; i < n; ++ i){
scanf("%d %d", &x, &y);
v[x].push_back(y);
viz[y] = 1;
}
for(int i = 1; i <= n; ++ i)
if(! viz[i]){
memset(viz, 0, sizeof(viz));
dfs(i);
break;
}
for(int i = 1; i <= n; ++ i)
printf("%d ", Ans[i]);
return 0;
}