All submissions for this problem are available.
Read problems statements in Mandarin Chinese, Russian and Vietnamese as well.
You are given 4 points on the 2D plane. You should tell whether there is a triangle whose sides pass through all the 4 points, and if there is, then find one such triangle. The outputted triangle can be degenerate as well (that is, all three of its vertices can be collinear).
- The first line of the input contains an integer T, denoting the number of test cases.
- Each test-case is described by a single line containing 8 space-separated integers, x1, y1, x2, y2, x3, y3, x4 and y4. These describe the coordinates of the 4 given points, which are (x1, y1), (x2, y2), (x3, y3) and (x4, y4).
For each test-case output its answer in a new line. If there is no triangle which perfectly pass through the 4 given points then output "NO". Otherwise output "YES", followed by 6 real numbers p1, q1, p2, q2, p3 and q3 in the same line. These should describe the vertices of the triangle: (p1, q1), (p2, q2) and (p3, q3). These points can be in any order, but they should satisfy (-106 ≤ p1, q1, p2, q2, p3, q3 ≤ 106) . It is guaranteed that if the answer is "YES", there will be at least one triangle satisfying these constraints.
The triangle will be accepted if, for every input point A = (xi, yi), there exists an edge (say its endpoints are B = (pi, qi) and C = (pj, qj)) of the triangle such that the absolute difference between dist(B, C) and dist(B, A) + dist(A, C) is less than 10-9.
- 1 ≤ T ≤ 10,000
- -100 ≤ x1, y1, x2, y2, x3, y3, x4, y4 ≤ 100
- No two points will coincide.
Input: 2 1 1 1 3 1 2 2 1 1 1 2 2 2 0 1 0 Output: YES 1.000 1.000 1.000 4.000 3.000 1.000 YES 0.000 0.000 3.000 3.000 3.000 0.000
The first testcase corresponds to this image:
The Ai's (marked in red) correspond to the input points, and the triangle is the outputted triangle.
The second testcase corresponds to this image:
|Time Limit:||1 sec|
|Source Limit:||50000 Bytes|
|Languages:||C, CPP14, JAVA, PYTH, PYTH 3.5, PYPY, CS2, PAS fpc, PAS gpc, RUBY, PHP, GO, NODEJS, HASK, SCALA, D, PERL, FORT, WSPC, ADA, CAML, ICK, BF, ASM, CLPS, PRLG, ICON, SCM qobi, PIKE, ST, NICE, LUA, BASH, NEM, LISP sbcl, LISP clisp, SCM guile, JS, ERL, TCL, PERL6, TEXT, SCM chicken, CLOJ, FS|
Fetching successful submissions
If you are still having problems, see a sample solution here.