1. /**
    2. author: dawn sink
    3. create: 2021.04.22
    4.  █████╗ ██╗  ██╗
    5. ██╔══██╗██║ ██╔╝
    6. ███████║█████╔╝
    7. ██╔══██║██╔═██╗
    8. ██║  ██║██║  ██╗
    9. ╚═╝  ╚═╝╚═╝  ╚═╝
    10. **/
    11. #include <bits/stdc++.h>
    12. using namespace std;
    13. #define ll long long
    14. #define ull unsigned long long
    15. #define str string
    16. #define rep(i,a,b) for(int i = a;i<=b;i++)
    17. #define per(i,a,b) for(int i = a;i>=b;i--)
    18. #define each(a,x) for(auto& a : x)
    19. #define all(x) x.begin(),x.end()
    20. #define sor(x) sort(all(x))
    21. #define ini(a,j) memset(a,j,sizeof a)
    22. #define make_unique(x) sor(x),x.erase(unique(all(x)),x.end())
    23. #define sz(x) (int(x.size()))
    24. #define fr first;
    25. #define sd second;
    26. #define bg(x) begin(x)
    27. #define pb push_back
    28. #define beg begin
    29. #define ed end
    30. #define rall(x) x.rbegin(),x.rend()
    31. #define rsz resize
    32. #define ft front()
    33. #define bk back
    34. #define pf push_front
    35. #define rtn return
    36. #define bs(x) bitset<x>
    38. #define lb lower_bound
    39. #define ub upper_bound
    41. #define inp ios_base::sync_with_stdio(false),cin.tie(nullptr)
    43. using pii = pair<int,int>;
    44. using pll = pair<ll,ll>;
    45. using pdb = pair<double,double>;
    46. using vll = vector<ll>;
    47. using vul = vector<ull>;
    48. using vi  = vector<int>;
    49. using vb  = vector<bool>;
    50. using vs  = vector<string>;
    51. using vpi = vector<pii>;
    52. using vpl = vector<pll>;
    53. using vpd = vector<pdb>;
    55. const int mod = 1e9 + 7;
    56. const int MX  = 2e5+5;
    57. const ll  INF = 1e18;
    58. const int dx[] = {1,0,-1,0}, dy[] = {0,1,0,-1};
    61. int main()
    62. {
    63.     inp;
    65.     rtn 0;
    66. }