Ответы на вопрос:
#include <iostream>
#include <cmath>
#include <vector>
#include <algorithm>
#include <set>
using namespace std;
struct point{
double x;
double y;
};
signed main() {
point A,O;
double r;
cin >> A.x >> A.y >> O.x >> O.y >> r;
double A_O_dist = sqrt(pow(A.x - O.x,2) + pow(A.y - O.y,2));
if(A_O_dist > r)
cout << "NO";
else
cout << "YES";
}
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