#include using namespace std; #define fst(t) std::get<0>(t) #define snd(t) std::get<1>(t) #define thd(t) std::get<2>(t) #define unless(p) if(!(p)) #define until(p) while(!(p)) using ll = long long; using P = std::tuple; const int dx[8] = {-1, 1, 0, 0, -1, -1, 1, 1}, dy[8] = {0, 0, -1, 1, -1, 1, -1, 1}; int N; ll X[100100], Y[100100], Z[100100]; template T at(T (&arr)[n], int idx){ if(0 <= idx && idx < n){ return arr[idx]; } return 0; } int main(){ std::cin.tie(nullptr); std::ios::sync_with_stdio(false); std::cin >> N; for(int i=0;i> Y[i]; } sort(Y, Y+N); copy(Y, Y+N, X); copy(Y, Y+N, Z); for(int i=0;i+1=0;--i){ Z[i-1] += Z[i]; } ll res = -1; for(int i=0;i x){ res = x; } } std::cout << res << std::endl; }