diff --git a/_Footer.md b/_Footer.md
deleted file mode 100644
index 29ce3ec..0000000
--- a/_Footer.md
+++ /dev/null
@@ -1,72 +0,0 @@
->
-    2 using namespace std;
-    3 
-    4 template <typename T>
->>  5 void _dbg(char const * s, const T &t) { cout << s << "=" << t <      < endl; }
-    6 template <typename T, typename... TA>
->>  7 void _dbg(char const *s, const T &t, const TA&... ta) { while (      *s != ',') cout << *s++; cout << "=" << t << ","; _dbg(s + 1, t      a...); }
-    8 template <typename T1, typename T2>
->>  9 ostream& operator<<(ostream &os, const pair<T1, T2> &p) { retur      n os << "{" << p.first << "," << p.second << "}"; }
-   10 template <typename T>
->> 11 some text added.
-   12 ostream& operator<<(ostream &os, const vector<T> &v) {
-   13     os << "{";
-   14     for (auto it = v.begin(); it != v.end(); ++it) {
-   15         if (it != v.begin()) os << ",";
-   16         os << *it;
-   17     }
-   18     return os << "}";
-   19 }
-   20 template <typename T1, typename T2>
->> 21 ostream& operator<<(ostream &os, const map<T1, T2> &mp) {
-   22     os << "{";
-   23     for (auto it = mp.begin(); it != mp.end(); ++it) {
-   24         if (it != mp.begin()) os << ",";
-   25         os << *it;
-   26     }
-   27     return os << "}";
-   28 }
-   29 template <typename T>
->> 30 ostream& operator<<(ostream &os, const set<T> &s) {
-   31     os << "{";
-   32     for (auto it = s.begin(); it != s.end(); ++it) {
-   33         if (it != s.begin()) os << ",";
-   34         os << *it;
-   35     }
-   36     return os << "}";
-   37 }
-   38 template <typename T>
-   39 ostream& operator<<(ostream &os, const multiset<T> &s) {
-   40     os << "{";
-   41     for (auto it = s.begin(); it != s.end(); ++it) {
-   42         if (it != s.begin()) os << ",";
-   43         os << *it;
-   44     }
-   45     return os << "}";
-   46 }
-   47 template <size_t N>
-   48 ostream& operator<<(ostream &os, const bitset<N> &bs) {
-   49     os << "{";
-   50     for (size_t i = 0; i < N; ++i) {
-   51         cout << bs[i];
-   52     }
-   53     return os << "}";
-   54 }
-   55 
-   56 #ifdef LOCAL
-   57 #define dbg(...) _dbg(#__VA_ARGS__, __VA_ARGS__)
-   58 #else
-   59 #define dbg(...)
-   60 #endif
-   61 
-   62 #define all(x) (x).begin(), (x).end()
-   63 #define rall(x) (x).rbegin(), (x).rend()
-   64 #define reunique(x) (x).resize(std::unique(all(x)) - (x).begin(      ))
-   65 using ll = long long;
-   66 using ld = long double;
-   67 using pii = pair<int, int>;
-   68 using pll = pair<ll, ll>;
-   69 using pdd = pair<ld, ld>;
-   70 
-   71 struct Ev {
-   72     int x;
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