#include #include using namespace std; using namespace atcoder; #define rep(i, n) for(int i=0;i<(n);++i) #define rep1(i, n) for(int i=1;i<=(n);i++) #define ll long long using mint = modint998244353; using P = pair; using lb = long double; using T = tuple; #ifdef LOCAL # include # define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__) #else # define dbg(...) (static_cast(0)) #endif int main() { int n; cin >> n; vector a(n); rep(i,n) cin >> a[i]; cout << 0 << endl; set st; st.insert(-4e18); st.insert(4e18); st.insert(a[0]); ll ans = 4e18; for(int i=1;i