Submission #1672525

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#define INF (1LL << 31 - 1)
#define MOD int(1e9+7)
#define repi(i,j,n) for(int i = (j); i < (n); ++i)
#define rep(i,n) repi(i,0,n)
#define fi first
#define se second

inline void init() {
    cin.tie(0);
    ios::sync_with_stdio(false);
}

double x[3], y[3];

int main() {
  for(int i = 0; i < 3; ++i) {
    cin >> x[i] >> y[i];
  }

  double ans = 0.0;

  for (int i = 1; i < 3; ++i) {
    x[i] -= x[0];
    y[i] -= y[0];
  }

  ans = fabs(x[1] * y[2] - x[2] * y[1]);
  
  cout << fixed;
  cout.precision(5);
  cout << ans / 2.0 << endl;
  
  return 0;
}

Submission Info

Judge Result