text: #define DEBUG 0
  
  #include <cassert>
  #include <cstdio>
  #include <cstdlib>
  #include <cstring>
  #include <ctime>
  #include <fstream>
  #include <iostream>
  #include <sstream>
  #include <vector>
  using namespace std;
  
  typedef pair<int, int> pii;
  
  // Random number in range [lo, hi] for nonnegative lo and hi.
  int rand(int lo, int hi) {
    return ((rand() & 0x7fff) | ((rand() & 0x7fff) << 15)) % (hi - lo + 1) + lo;
  }
  
  string name(int num, string ext) {
    stringstream ss;
    ss << num;
    string str;
    ss >> str;
    return "secret/" + str + ext;
  }
  
  /*** VERIFIER ***/
  
  /*** GENERATOR ***/
  
  void gen() {
    ofstream fout(name(2, ".in").c_str());
    fout << 50 << endl;
    for (int i = 0; i < 20; i++) {
      fout << rand(1, 100) << endl;
    }
    for (int i = 0; i < 30; i++) {
      fout << rand(100, 1000) << endl;
    }
    fout.close();
  }
  
  int main() {
    srand(0xDEADBEEF);
    // GENERATE
    gen();
    return 0;
  }
  