本来想着10分钟过一道题的，没想到第一题直接全给我爆RE ？？？？？？？

这代码哪里有问题了，本地可以过，洛谷IDE也可以过，一提交就全RE

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

const int MAXN = 100005;
const int inf = numeric_limits<int>::max();
int fa[MAXN];
int n, m;

int find(int x) {
  if (fa[x] == x)
    return x;
  return fa[x] = find(fa[x]);
}

int unity(int x, int y) {
  x = find(x), y = find(y);
  if (x != y) fa[x] = y;
}

void init() {
  for (int i = 1; i <= n; ++i) {
    fa[i] = i;
  }
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  cin >> n >> m;
  init();
  for (int i = 0; i < m; ++i) {
    int z, x, y;
    cin >> z >> x >> y;
    if (z == 1) {
      unity(x, y);
    } else {
      cout << ((find(x) == find(y)) ? "Y" : "N") << endl;
    }
  }
}