Submission #486524

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Source Code Expand

#include <bits/stdc++.h>
#include <cstdint>
#include <sys/time.h>

typedef std::int_fast32_t  s32;
typedef std::uint_fast32_t u32;
typedef std::int_fast64_t  s64;
typedef std::uint_fast64_t u64;

const unsigned long mod = 1000000007;
const double EPS = 0.00000001;
const int INF = (1 << 30);

template<typename T>
inline std::istream& operator >> (std::istream& is, std::complex<T>& C) {
  T R, I;
  std::cin >> R >> I;
  C = std::complex<T>(R, I);
  return is;
}

int main() {
  
  int n;
  std::complex<double> P[128];

  std::cin >> n;
  for(int i = 0; i < n; ++i) {
    std::cin >> P[i];
  }

  double res = 0;
  for(int i = 0; i < n; ++i) {
    for(int j = 0; j < n; ++j) {
      std::complex<double> L = P[j] - P[i];
      res = std::max(res, std::abs(L));
    }
  }

  printf("%.20lf\n", res);
  
  return 0;
}

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