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27 lines
680 B
C++
27 lines
680 B
C++
#define _CRT_SECURE_NO_WARNINGS
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#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
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#include <bits/stdc++.h>
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using namespace std;
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struct Point
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{
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double x, y;
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} ps[1050];
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double area(const Point &a, const Point &b, const Point &c)
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{
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return abs(b.x * c.y + a.x * b.y + c.x * a.y - c.x * b.y - b.x * a.y - a.x * c.y) / 2;
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}
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int main()
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{
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int n;
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scanf("%d", &n);
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for (int i = 0; i < n; i++)
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scanf("%lf%lf", &ps[i].x, &ps[i].y);
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double ans = 0;
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for (int i = 0; i < n; i++)
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for (int j = 0; j < i; j++)
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for (int k = 0; k < j; k++)
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ans = max(ans, area(ps[i], ps[j], ps[k]));
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printf("%.2lf", ans);
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return 0;
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}
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