#include <bits/stdc++.h>
using namespace std;
#ifdef tabr
#include "library/debug.cpp"
#else
#define debug(...)
#endif
struct dsu {
vector<int> p;
vector<int> sz;
int n;
dsu(int _n) : n(_n) {
p = vector<int>(n);
iota(p.begin(), p.end(), 0);
sz = vector<int>(n, 1);
}
inline int get(int x) {
if (p[x] == x) {
return x;
} else {
return p[x] = get(p[x]);
}
}
inline bool unite(int x, int y) {
x = get(x);
y = get(y);
if (x == y) {
return false;
}
p[x] = y;
sz[y] += sz[x];
return true;
}
inline bool same(int x, int y) {
return (get(x) == get(y));
}
inline int size(int x) {
return sz[get(x)];
}
};
int n;
bitset<1500> g[1500];
dsu uf(0);
void initialize(int _n) {
n = _n;
uf = dsu(n);
}
int hasEdge(int u, int v) {
assert(!uf.same(u, v));
vector<int> a, b;
for (int i = 0; i < n; i++) {
if (uf.same(i, u)) {
a.emplace_back(i);
} else if (uf.same(i, v)) {
b.emplace_back(i);
}
}
g[u][v] = g[v][u] = 1;
bitset<1500> c;
for (int i : b) {
c[i] = 1;
}
for (int i : a) {
if ((g[i] & c).count() != b.size()) {
return 0;
}
}
uf.unite(u, v);
return 1;
}
#ifdef tabr
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
return 0;
}
#endif
