请问这样子写为什么不能AC

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

const int N = 1e5 + 100;
int fa[N];
int n, m;

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

int main() {
    ios::sync_with_stdio(false);

    cin >> n >> m;
    for (int i = 1; i <= n; i ++)
        fa[i] = i;

    while (m --) {
        int z, x, y;
        cin >> z >> x >> y;
        if (z == 1) {
            fa[find(x)] = find(y);
        } else {
            if (find(x) == find(y))
                cout << "Y" << endl;
            else 
                cout << "N" << endl;
        }
    }

    return 0;
}