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【SSL

思路:

叉积模板

c o d e code code

#include<iostream>
#include<cstdio>using namespace std;int t;
int x, y, x1, y1, x2, y2;
double ans;double js(int x, int y, int x1, int y1)
{return x*y1-x1*y;
}int main()
{scanf("%d", &t);while(t--){scanf("%d%d%d%d%d%d", &x, &y, &x1, &y1, &x2, &y2);double s1=js(x1-x, y1-y, x2-x, y2-y);double s2=js(x-x1, y-y1, x2-x1, y2-y1);double s3=js(x-x2, y-y2, x1-x2, y1-y2);ans=max(s1, max(s2, s3));if(ans==0)printf("Error\n");else printf("%.1lf\n", ans);ans=0;}return 0;
}

本文标签: SSL