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#include <array>#include<bits/stdc++.h>using namespace std;const int N = 1e5 + 10;int main(){ int n; cin >> n; array<double, N> arr{}; double t; int i = 0; for (auto &e : arr) { cin &g.

#include<bits/stdc++.h>using namespace std;class Point{ private: double x, y; public: Point(){x = 0, y = 0;} Point(double a, double b) : x(a), y(b) {} friend Point operator + (const Point &am.

#include<bits/stdc++.h>using namespace std;const int PI = 3.14159;class Shape{ public: Shape(){} virtual double getArea(){} virtual double getPerim(){}};class Rectangle : public Shape{ private: double Wide, Long;.

#include<bits/stdc++.h>using namespace std;class Counter{ public: int cnt = 0; Counter(){} Counter(int a) : cnt(a){} Counter operator +(const Counter &c) const { return Counter(cnt + c.cnt); }};.