func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     int n, q;     cin >> n >> q;     set<int> s;     multiset<int> m;     auto add = [&](int x) {       auto it = s.insert(x).first;       if (next(it) != s.end() && it != s.begin())         m.erase(m.find(*next(it) - *prev(it)));       if (next(it) != s.end()) m.insert(*next(it) - x);       if (it != s.begin()) m.insert(x - *prev(it));     };     auto rm = [&](int x) {       s.erase(x);       auto it = s.lower_bound(x);       if (it != s.end()) m.erase(m.find(*it - x));       if (it != s.begin()) m.erase(m.find(x - *prev(it)));       if (it != s.end() && it != s.begin()) m.insert(*it - *prev(it));     };     for (int i = 0; i < n; i++) {       int x;       cin >> x;       add(x);     }     auto solve = [&]() -> long long {       if (s.size() <= 1)         return 0;       else         return (*s.rbegin() - *s.begin() - *m.rbegin());     };     cout << solve() <<   n ;     while (q--) {       int t, x;       cin >> t >> x;       if (t == 0)         rm(x);       else         add(x);       cout << solve() <<   n ;     }     return 0;   }   