#include #define endl '\n'; #define rep(i,n) for(int i=0; i<(n); i++) using namespace std; using ll = long long; using P = pair; #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native") #pragma GCC optimize("Ofast") constexpr ll INF = 1e18; constexpr int inf = 1e9; constexpr double INFD = 1e100; constexpr ll mod = 1000000007; constexpr ll mod2 = 998244353; const double PI = 3.1415926535897932384626433832795028841971; const int dx[4] = {1, 0, -1, 0}; const int dy[4] = {0, 1, 0, -1}; template inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } // ios::sync_with_stdio(false); // cin.tie(nullptr); // --------------------------------------------------------------------------- int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); int N; cin >> N; vector A(N); for(int i=0; i> A[i]; } sort(A.begin(),A.end()); A.push_back(inf); vector vec; for(int i=0; i