func_code_string: #include <bits/stdc++.h>   using namespace std;   void err(istream_iterator<string> it) { cerr << endl; }   template <typename T, typename... Args>   void err(istream_iterator<string> it, T a, Args... args) {     cerr << *it <<   =   << a <<  ,  ;     err(++it, args...);   }   void solve() {     int n, m;     cin >> n >> m;     vector<int> l(m), r(m);     for (int i = 0; i < m; ++i) {       cin >> l[i] >> r[i];     }     for (int i = 0; i < n; ++i) cout << (i & 1);     cout << endl;   }   int main(int argc, char* argv[]) {     ios::sync_with_stdio(false);     cin.tie(nullptr);     solve();     return 0;   }   