#include #include #include #include #include #include #include #define REP(i, a, b) for (int i = int(a); i < int(b); i++) using namespace std; using ll = long long int; using P = pair; // clang-format off #ifdef _DEBUG_ #define dump(...) do{ cerr << __LINE__ << ":\t" << #__VA_ARGS__ << " = "; PPPPP(__VA_ARGS__); cerr << endl; } while(false) template void PPPPP(T t) { cerr << t; } template void PPPPP(T t, S... s) { cerr << t << ", "; PPPPP(s...); } #else #define dump(...) do{ } while(false) #endif template vector make_v(size_t a, T b) { return vector(a, b); } template auto make_v(size_t a, Ts... ts) { return vector(a, make_v(ts...)); } template bool chmin(T &a, T b) { if (a > b) {a = b; return true; } return false; } template bool chmax(T &a, T b) { if (a < b) {a = b; return true; } return false; } template void print(T a) { cout << a << endl; } template void print(T a, Ts... ts) { cout << a << ' '; print(ts...); } template istream &operator,(istream &in, T &t) { return in >> t; } // clang-format on int main() { cin.tie(nullptr); ios::sync_with_stdio(false); int n, m; cin, n, m; vector> G(n); vector cnt(n, 0); REP(i, 0, m) { int a, b; cin, a, b; if (a > b) swap(a, b); cnt[a]++; G[b].push_back(a); } bool f = false; for (int i = n - 1; i >= 0; i--) { if (cnt[i]) { f = true; cout << 1; for (auto c : G[i]) { cnt[c]--; } } else { if (f) { cout << 0; } } } cout << endl; return 0; }