다각형

[골5] 2166 - 다각형의 면적

#include #include #include #define FAST_IO() \ {\ ios::sync_with_stdio(false);\ cin.tie(NULL); \ cout.tie(NULL); \ }\ #define x first #define y second using namespace std; using dp = pair; double Calculate(double x1, double x2, double x3, double y1, double y2, double y3) { double res = x1 * y2 + x2 * y3 + x3 * y1; res -= x2 * y1 + x3 * y2 + x1 * y3; return res / 2; } int main() { FAST_IO(); int ..