#include "migrations.h"
int d[100001];
int ans;
int send_message(int N, int i, int Pi)
{
if (i == 1)
{
d[0] = 0;
ans = 0;
}
d[i] = d[Pi] + 1;
if (d[i] > ans)
{
ans = d[i];
return i + 1;
}
else
return 0;
}
std::pair<int, int> longest_path(std::vector<int> S)
{
int n = S.size();
int aans = 0;
for (int i = 1; i < n; i++)
{
if (S[i] != 0)
{
aans = S[i];
}
}
return {0, aans - 1};
}
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