Weishen/Hydro
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core: calc difficulty after each submission

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undefined committed 2021-03-12 17:08:14 +08:00
1 parent 139c1e2f59
commit 44ec26ac89
7 files changed
+24 -23
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packages/hydrooj/src/script/difficulty.ts
-62
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@@ -1,62 +0,0 @@
import * as problem from '../model/problem';
export const description = 'Caculate the difficulty of a problem';
const _CACHE_INFO = {
last_s: 0.0,
last_y: 0,
values: [0.0],
};
function _LOGP(x: number) {
const sqrt_2_pi = 2.506628274631000502415765284811; // Sqrt[Pi]
return (2 * Math.exp(-1.0 * (Math.log(x) ** 2) * 2)) / x / sqrt_2_pi;
}
function _integrate_ensure_cache(y: number) {
let last_y = _CACHE_INFO.last_y;
if (y <= last_y) return _CACHE_INFO;
let s = _CACHE_INFO.last_s;
const dx = 0.1;
const dT = 2;
let x0 = (last_y / dT) * dx;
while (y > last_y) {
x0 += dx;
s += _LOGP(x0) * dx;
for (let i = 1; i <= dT; i++) _CACHE_INFO.values.push(s);
last_y += dT;
}
_CACHE_INFO.last_y = last_y;
_CACHE_INFO.last_s = s;
return _CACHE_INFO;
}
_integrate_ensure_cache(1000000);
function _integrate(y: number) {
_integrate_ensure_cache(y);
return _CACHE_INFO.values[y];
}
function difficultyAlgorithm(nSubmit: number, nAccept: number) {
if (!nSubmit) return null;
const s = _integrate(nSubmit);
const ac_rate = nAccept / nSubmit;
const ans = Math.round(10.0 - 1.30 * s * 10.0 * ac_rate);
return Math.max(ans, 1);
}
export async function run({
domainId, pid,
}) {
const pdoc = await problem.get(domainId, pid);
const difficulty = difficultyAlgorithm(pdoc.nSubmit, pdoc.nAccept);
return await problem.edit(domainId, pdoc.docId, { difficulty });
}
export const validate = {
domainId: { $type: 'string' },
pid: { $type: 'number' },
};
global.Hydro.script.difficulty = { run, description, validate };
packages/hydrooj/src/script/problemStat.ts
+1 -1
View File
@@ -29,7 +29,7 @@ export async function udoc() {
];
let bulk = db.collection('domain.user').initializeUnorderedBulkOp();
const cursor = db.collection('record').aggregate(pipeline);
while (cursor.hasNext()) {
while (await cursor.hasNext()) {
const adoc = await cursor.next() as any;
bulk.find({
domainId: adoc._id.domainId,