The problem.json File

The problem.json file contains the basic information of a problem. It is placed under the problem folder.

Note

You need basic Json skills before continuing. Google it if you don’t know.

The Problem Attribute

The file itself is a object, so start it by writing a pair of {}.

Element	Type	Explanation	Example
name	String	Name	“A+B Problem”
tl	Integer	Time Limit per test in ms	1000
ml	Integer	Memory Limit per test in KB	262144
ver	Integer	the current problem version. Should be positive	1
diff	Float	[WIP]The difficulty of the problem	1.0
tests	TestMap	The subtask detail
order	String[]	The order of the subtasks to be judged. Should represent a subtask by its ID

The TestMap

TestMap contains information for subtasks. Each key maps to the id of a subtask, each value maps to the configuration for that subtask. Each subtask has the following arguments:

Element	Type	Explanation	Example
scheme	String	Should be one from “min” “max” “sum” “avg” The marking scheme for the subtask	“min”
requirement	String[]	All subtasks in requirement should be passed in order to test this subtask. Represent subtasks by their ID. All subtasks in requirement should be judged earlier than this.	[]
toEnd	Boolean	Declares that all testcases in this subtask should be tested Often used when scheme is “sum” “avg”	true
score	Float	the base score ratio of this subtask. Expected: 0.0~1.0	0.6

Example Problem.json

{
  "name":"Test Problem",
  "tl":1000,
  "ml":262144,
  "ver":7,
  "order":["easy","hard"],
  "diff":2.0,
  "tests":{
    "easy":{
      "scheme":"min",
      "requirement:":[],
      "toEnd":true,
      "score":0.6
    },
    "hard":{
      "scheme":"sum",
      "requirement":["easy"],
      "toEnd":false,
      "score":0.2
    }
  }
}