// Success consists of going from failure to failure without loss of enthusiasm
#include <bits/stdc++.h>
using namespace std;
#define nl '\n'
#define pb push_back
#define pf push_front
#define mp make_pair
#define f first
#define s second
#define sz(x) int(x.size())
template<class T> using V = vector<T>;
using pi = pair<int, int>;
using vi = V<int>;
using vpi = V<pi>;
using ll = long long;
using pl = pair<ll, ll>;
using vpl = V<pl>;
using vl = V<ll>;
using db = long double;
template<class T> using pq = priority_queue<T, V<T>, greater<T>>;
const int MOD = 1e9 + 7;
const ll INFL = ll(1e16) + 10;
struct Scanner {
FILE* stream;
Scanner(FILE* s) : stream(s) {}
char buf[1 << 20], * l = buf, * r = buf;
bool flush() { l = buf; r = l + fread(buf, 1, 1 << 20, stream); return l == r; }
void get(char& c) { c = l == r && flush() ? ' ' : *l++; }
friend Scanner& operator >>(Scanner& in, char& c) { return in.get(c), in; }
friend Scanner& operator >>(Scanner& in, char* s) {
for (in.get(s[0]); isspace(s[0]); in.get(s[0]));
for (int i = 0; !isspace(s[i]) || (s[i] = '\0'); i++) in.get(s[i + 1]);
return in;
}
friend Scanner& operator >>(Scanner& in, std::string& s) {
char c;
for (in.get(c); isspace(c); in.get(c));
for (s = ""; !isspace(c); in.get(c)) s += c;
return in;
}
template <class T, std::enable_if_t<std::is_integral_v<T>, int> = 0>
friend Scanner& operator >>(Scanner& in, T& x) {
char c, f = '+';
for (in.get(c); !isdigit(c); in.get(c))
if constexpr (std::is_signed_v<T>) f = c;
for (x = 0; isdigit(c); in.get(c)) x = x * (1 << 1) + x * (1 << 3) + c - '0';
if constexpr (std::is_signed_v<T>) x = f == '-' ? -x : x;
return in;
}
template <class T, std::enable_if_t<std::is_floating_point_v<T>, int> = 0>
friend Scanner& operator >>(Scanner& in, T& x) {
std::string s; in >> s; x = std::stod(s);
return in;
}
template <class T, class U>
friend Scanner& operator >>(Scanner& in, std::pair<T, U>& a) {
return in >> a.first >> a.second;
}
template <class T, size_t S>
friend Scanner& operator >>(Scanner& in, std::array<T, S>& a) {
for (int i = 0, n = S; i < n; i++) in >> a[i];
return in;
}
template <class T>
friend Scanner& operator >>(Scanner& in, std::vector<T>& a) {
for (int i = 0, n = a.size(); i < n; i++) in >> a[i];
return in;
}
};
struct Printer {
FILE* stream;
Printer(FILE* s) : stream(s) {}
char buf[1 << 20], * l = buf, * r = buf + (1 << 20) - 1;
int format = 0, precision = 15;
~Printer() { flush(); }
void flush() { fwrite(buf, 1, l - buf, stream); l = buf; }
void put(const char& c) { *l++ = c; if (l == r) flush(); }
friend Printer& operator <<(Printer& out, const char& c) { return out.put(c), out; }
friend Printer& operator <<(Printer& out, const char* s) {
for (int i = 0; s[i] != '\0'; i++) out.put(s[i]);
return out;
}
friend Printer& operator <<(Printer& out, const std::string& s) {
for (int i = 0, n = s.size(); i < n; i++) out.put(s[i]);
return out;
}
template <class T, std::enable_if_t<std::is_integral_v<T>, int> = 0>
friend Printer& operator <<(Printer& out, T x) {
static char s[40];
static int i = 0;
if (x == 0) { out.put('0'); return out; }
if constexpr (std::is_signed_v<T>) x = x < 0 ? out.put('-'), -x : x;
while (x > 0) s[++i] = x % 10 + '0', x /= 10;
while (i > 0) out.put(s[i--]);
return out;
}
template <class T, std::enable_if_t<std::is_floating_point_v<T>, int> = 0>
friend Printer& operator <<(Printer& out, T x) {
std::ostringstream oss;
oss << std::fixed << std::setprecision(out.precision) << x;
return out << oss.str();
}
template <class T, class U>
friend Printer& operator <<(Printer& out, const std::pair<T, U>& a) {
return out << a.first << " \n"[out.format > 1] << a.second;
}
template <class T, size_t S>
friend Printer& operator <<(Printer& out, const std::array<T, S>& a) {
out << a[0];
for (int i = 1, n = S; i < n; i++) out << " \n"[out.format > 1] << a[i];
return out;
}
template <class T>
friend Printer& operator <<(Printer& out, const std::vector<T>& a) {
if (!a.empty()) out << a[0];
for (int i = 1, n = a.size(); i < n; i++) out << " \n"[out.format > 0] << a[i];
return out;
}
};
Scanner in(stdin);
Printer out(stdout);
int main() {
cin.tie(0)->sync_with_stdio(0);
int N; in >> N;
vpi A(N); for(auto& x : A) {
in >> x.f >> x.s;
}
int ROWS = 0, COLS = 0;
for(int t = 0; t < 2; t++) {
vi X; for(auto& x : A) X.pb(x.f);
sort(begin(X), end(X)); X.erase(unique(begin(X), end(X)), end(X));
for(auto& x : A) {
x.f = lower_bound(begin(X), end(X), x.f) - begin(X);
swap(x.f, x.s);
}
ROWS = sz(X); swap(ROWS, COLS);
}
unordered_map<ll, int> IDX; for(int i = 0; i < N; i++) {
// cerr << A[i].f << " " << A[i].s << " is " << i << endl;
IDX[A[i].f * 1LL * COLS + A[i].s] = i;
}
V<vi> C(COLS);
for(int i = 0; i < N; i++) C[A[i].s].pb(A[i].f);
for(int i = 0; i < COLS; i++) sort(begin(C[i]), end(C[i]));
const pi EMP = mp(-1, -1);
vpi RF(ROWS, EMP);
vpi RB(ROWS, EMP);
vi POS(2 * COLS, -1); int Q = 0;
vi stk;
function<void(int)> update = [&](int X) {
stk.pb(X);
while(sz(stk)) {
int x = stk.back(); stk.pop_back();
if (POS[x] == -1) continue;
// 2*y+c => y is col # and c is dir (0 - dwn (+1), 1 - up (-1));
int y = x / 2, dir = (x % 2 ? -1 : +1);
while(1) {
Q++; assert(Q <= 5 * N);
if (POS[x] < 0 || POS[x] >= sz(C[y])) {
POS[x] = -1; break;
}
if (POS[2*y] == POS[2*y+1]) {
POS[x] = -1;
break; // stop because same as other one
}
int r = C[y][POS[x]]; // row
// check if you can put it in
if (RB[r] == EMP || RB[r].f < y) { // sz(R[r]) == 2 put in at the back
if (RB[r] != EMP) {
int i = RB[r].s;
RB[r] = mp(y, x);
stk.pb(i);
} else RB[r] = mp(y, x);
break;
}
if (RF[r] == EMP || y < RF[r].f) { // sz(R[r]) == 2 put in at the front
if (RF[r] != EMP) {
int i = RF[r].s;
RF[r] = mp(y, x);
stk.pb(i);
} else RF[r] = mp(y, x);
break;
}
POS[x] += dir;
}
}
};
for(int c = 0; c < COLS; c++) {
POS[2 * c] = 0;
update(2 * c);
POS[2 * c + 1] = sz(C[c]) - 1;
update(2 * c + 1);
}
vpi take;
for(int i = 0; i < 2 * COLS; i++) {
int c = i / 2;
if (0 <= POS[i] && POS[i] < sz(C[c])) {
take.pb(mp(C[c][POS[i]], c));
}
}
string ans(N, '0');
for(auto& p : take) {
ans[IDX[p.f * 1LL * COLS + p.s]] = '1';
}
out << ans << nl;
// cerr << Q << endl;
return 0;
}
