#include <iostream>      #include <cstdio>      #include <string>      #include <string.h>      #include <map>      #include <vector>      #include <cstdlib>      #include <cmath>      #include <algorithm>      #include <queue>      #include <set>      #include <stack>      using namespace std;            int main()      {          int t;          double x1,y1,x2,y2,x3,y3,x4,y4;          scanf("%d", &t);          printf("INTERSECTING LINES OUTPUT\n");          while(t--)          {              scanf("%lf%lf%lf%lf%lf%lf%lf%lf", &x1,&y1,&x2,&y2,&x3,&y3,&x4,&y4);              if(x1==x2 && x3==x4)//两直线都没有斜率              {                  if(x3==x1)                      printf("LINE\n");                  else                      printf("NONE\n");              }              else if(x1==x2 && x3!=x4)//有一条直线斜率存在              {                  double k = (y4-y3)*1.0/(x4-x3);                  double b = y3-(k*x3);                  double ansx = x1;                  double ansy = k*x1+b;                  printf("POINT %.2lf %.2lf\n", ansx, ansy);              }              else if(x1!=x2 && x3==x4)//有一条直线斜率存在              {                  double k = (y2-y1)*1.0/(x2-x1);                  double b = y2-(k*x2);                  double ansx = x3;                  double ansy = k*x3+b;                  printf("POINT %.2lf %.2lf\n", ansx, ansy);              }              else //两条直线斜率都存在              {                  double k1 = (y2-y1)*1.0/(x2-x1);                  double b1 = y2-(k1*x2);                  double k2 = (y4-y3)*1.0/(x4-x3);                  double b2 = y3-(k2*x3);                  if(k1==k2)                  {                      if(b1==b2)                          printf("LINE\n");                      else                          printf("NONE\n");                  }                  else                  {                      double ansx = (b1-b2)*1.0/(k2-k1);                      double ansy = k1*ansx + b1;                      printf("POINT %.2lf %.2lf\n", ansx, ansy);                  }              }          }          printf("END OF OUTPUT\n");          return 0;      }