#pragma GCC optimize("Ofast") #include #include #include #include #include #include #include #include #include const long long INF = 1e17+7; const long long MOD = 1e9+7; const double PI=acos(-1); using namespace std; int main(){ int n; cin >> n; vector x(n),y(n); for(int i=0;i> x[i] >> y[i]; } int ans=0; for(int i=0;i