Chore: build snippet, index, site

theSoberSobber · May 25, 2024 · de92025 · de92025
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diff --git a/README.md b/README.md
diff --git a/book/codebook-dark.pdf b/book/codebook-dark.pdf
diff --git a/book/codebook-light.pdf b/book/codebook-light.pdf
diff --git a/docs/LCA-RMQ.md b/docs/LCA-RMQ.md
@@ -0,0 +1,71 @@
+
+## LCA-RMQ
+
+- LCA using Range Min Query(Sparse) on ETT ([Reference](https://codeforces.com/contest/1975/submission/262585070))
+- ```
+  https://thesobersobber.github.io/CP-Snippets/LCA-RMQ
+  ```
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L306)
+
+```cpp
+template<class T> 
+struct RMQ{
+    int n, logn;
+    vector<vector<int>> b;
+    vector<T> A;
+    void build(const vector<T> &a) {
+        A = a, n = sz(a);
+        logn = 32 - __builtin_clz(n);
+        b.resize(logn, vi(n));
+        iota(all(b[0]), 0);
+        for(int i = 1; i < logn ; i++){
+            for(int j = 0; j < n ; j++){
+                b[i][j] = b[i - 1][j];
+                if(j + (1 << (i - 1)) < n && A[b[i - 1][j + (1 << (i - 1))]] < A[b[i][j]]) 
+                    b[i][j] = b[i - 1][j + (1 << (i - 1))];
+            }
+        }
+    }
+    int rangeMin(int x, int y){
+        int k = 31 - __builtin_clz(y - x + 1);
+        return min(A[b[k][x]], A[b[k][y - (1 << k) + 1]]);
+    }
+    int minIndx(int x, int y){
+        int k = 31 - __builtin_clz(y - x + 1);
+        return A[b[k][x]] < A[b[k][y - (1 << k) + 1]] ? b[k][x] : b[k][y - (1 << k) + 1];
+    }
+};
+
+struct LCA {
+    vector<int> tour, Findx, dpth;
+    RMQ<int> rmq;
+    void build(const vector<vector<int>> &adj, int src) {
+        vector<bool> vis(sz(adj));
+        vector<int> dpth1(sz(adj));
+        function<void(int, int)> dfs = [&](int i, int d) {
+            tour.pb(i);
+            vis[i] = 1;
+            dpth1[i] = d;
+            for(auto &u: adj[i]) if(!vis[u])    dfs(u, d + 1), tour.pb(i);
+        };
+        dfs(src, 0);
+        Findx.resize(sz(adj));
+        dpth.resize(sz(tour));
+        for(int i = sz(tour) - 1 ; i >= 0 ; i--) {
+            dpth[i] = dpth1[tour[i]], Findx[tour[i]] = i;
+        }
+        rmq.build(dpth);
+    }
+    int lca(int x, int y) {
+        x = Findx[x], y = Findx[y];
+        if(x > y)     swap(x, y);
+        return tour[rmq.minIndx(x, y)];
+    }
+    int dist(int x, int y) {
+        x = Findx[x], y = Findx[y];
+        if(x > y)     swap(x, y);
+        return dpth[x] + dpth[y] - 2 * rmq.rangeMin(x, y);
+    }
+};
+
+```
diff --git a/docs/Lazy Segtree.md b/docs/Lazy Segtree.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/Lazy Segtree
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L488)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L554)
 
 ```cpp
 

diff --git a/docs/README.md b/docs/README.md
@@ -20,6 +20,7 @@ curl -L "https://raw.githubusercontent.com/theSoberSobber/CP-Snippets/main/snipp
 - **[DSU](https://thesobersobber.github.io/CP-Snippets/DSU)** : DSU 
 - **[ExtendedGcdDiophantine](https://thesobersobber.github.io/CP-Snippets/Extended GCD Diophantine, All Solution, Any Solution)** : Diophantine any and all soln 
 - **[General-Hash](https://thesobersobber.github.io/CP-Snippets/General-Hash)** : General Hash functions that returns two hashes, takes in 0 indexed arr or string, allows hash query on range, beware that this uses the decreasing power convention 
+- **[LCA-RMQ](https://thesobersobber.github.io/CP-Snippets/LCA-RMQ)** : LCA using Range Min Query(Sparse) on ETT ([Reference](https://codeforces.com/contest/1975/submission/262585070)) 
 - **[Segtree-General](https://thesobersobber.github.io/CP-Snippets/Segtree-General)** : General segree, needs node struct (with members def and epsilon(default) for all of them) and operation lambda (merge) 
 - **[Simpler-Segtree](https://thesobersobber.github.io/CP-Snippets/Simpler-Segtree)** : Init with an array simply using the build fn, customize operation and epslion in the struct itself, supports point updates and range queries 
 - **[Sparse-General](https://thesobersobber.github.io/CP-Snippets/Sparse-General)** : General Implementation of Sparse table with the template<class T> structure 

diff --git a/docs/Segtree-General.md b/docs/Segtree-General.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/Segtree-General
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L306)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L372)
 
 ```cpp
 template <typename T>

diff --git a/docs/Simpler-Segtree.md b/docs/Simpler-Segtree.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/Simpler-Segtree
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L383)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L449)
 
 ```cpp
 struct segtree {

diff --git a/docs/Sparse-General.md b/docs/Sparse-General.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/Sparse-General
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L437)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L503)
 
 ```cpp
 template<class T>

diff --git a/docs/Splay Tree.md b/docs/Splay Tree.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/Splay Tree
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L2466)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L2532)
 
 ```cpp
 

diff --git a/docs/arr-inp.md b/docs/arr-inp.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/arr-inp
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L637)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L703)
 
 ```cpp
 vector<int> a(n, 0);

diff --git a/docs/arr-pref.md b/docs/arr-pref.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/arr-pref
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L645)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L711)
 
 ```cpp
 vector<int> pre(n, 0);

diff --git a/docs/bfs-dist.md b/docs/bfs-dist.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/bfs-dist
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L653)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L719)
 
 ```cpp
 queue<int> q;

diff --git a/docs/binpow.md b/docs/binpow.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/binpow
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L672)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L738)
 
 ```cpp
 ll binpow(ll x, ll y){

diff --git a/docs/binsearch.md b/docs/binsearch.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/binsearch
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L687)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L753)
 
 ```cpp
 int lo = 0, hi = n-1;

diff --git a/docs/bp-small.md b/docs/bp-small.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/bp-small
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L708)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L774)
 
 ```cpp
 #include <bits/stdc++.h>

diff --git a/docs/bp.md b/docs/bp.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/bp
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L753)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L819)
 
 ```cpp
 #include <bits/stdc++.h>

diff --git a/docs/clock_for_TL.md b/docs/clock_for_TL.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/clock_for_TL
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L831)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L897)
 
 ```cpp
 auto start = chrono::high_resolution_clock::now();

diff --git a/docs/combi-mint.md b/docs/combi-mint.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/combi-mint
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L843)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L909)
 
 ```cpp
 const int mod=1e9+7;

diff --git a/docs/combi-struct.md b/docs/combi-struct.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/combi-struct
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L919)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L985)
 
 ```cpp
 struct Comb {

diff --git a/docs/combination-non-mod.md b/docs/combination-non-mod.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/combination-non-mod
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L970)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1036)
 
 ```cpp
 vector<vector<int>> dp(n+1, vector<int> (k+1));

diff --git a/docs/combination-small.md b/docs/combination-small.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/combination-small
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L987)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1053)
 
 ```cpp
 int C(int n,int r){

diff --git a/docs/combination.md b/docs/combination.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/combination
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1003)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1069)
 
 ```cpp
 int C(int n, int r){

diff --git a/docs/crt.md b/docs/crt.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/crt
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1016)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1082)
 
 ```cpp
 /**

diff --git a/docs/cute-lcm.md b/docs/cute-lcm.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/cute-lcm
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1040)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1106)
 
 ```cpp
 "https://math.stackexchange.com/questions/1579/n-ary-version-of-gcda-b-space-lcma-b-ab"

diff --git a/docs/derangments.md b/docs/derangments.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/derangments
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1050)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1116)
 
 ```cpp
 int countDerangements(int n){

diff --git a/docs/dfs-full.md b/docs/dfs-full.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/dfs-full
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1063)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1129)
 
 ```cpp
 auto dfs = [&](auto &&dfs, int curr, int parent, vector<int> &visG, vector<int> &visPath ,vector<int> &comp, bool &cycle_directed, stack<int> topo, vector<int> &adj) -> void {

diff --git a/docs/dfs.md b/docs/dfs.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/dfs
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1093)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1159)
 
 ```cpp
 map<int,int> dfs(int cur,int par,vi&a){

diff --git a/docs/diophantine.md b/docs/diophantine.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/diophantine
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1113)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1179)
 
 ```cpp
 long long gcd(long long a, long long b, long long &x, long long &y) {

diff --git a/docs/dsu-rr.md b/docs/dsu-rr.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/dsu-rr
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1189)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1255)
 
 ```cpp
 class Solution {

diff --git a/docs/easy_seive.md b/docs/easy_seive.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/easy_seive
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1228)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1294)
 
 ```cpp
 void ez_seive(int n){

diff --git a/docs/euclid.md b/docs/euclid.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/euclid
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1247)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1313)
 
 ```cpp
 int euclid_gcd(int a, int b){

diff --git a/docs/explanation_binsearch.md b/docs/explanation_binsearch.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/explanation_binsearch
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1272)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1338)
 
 ```cpp
 int lo = 0, hi = n-1; // see constraints for lo and hi, nahi mil rahe toh just take 0 and 1e18

diff --git a/docs/fac.md b/docs/fac.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/fac
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1307)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1373)
 
 ```cpp
 int fac[maxn];

diff --git a/docs/factorization.md b/docs/factorization.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/factorization
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1321)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1387)
 
 ```cpp
 void printFactors(int n) { 

diff --git a/docs/fenwick.md b/docs/fenwick.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/fenwick
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1351)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1417)
 
 ```cpp
 // 0-indexed BIT (binary indexed tree / Fenwick tree) (i : [0, len))

diff --git a/docs/file_io.md b/docs/file_io.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/file_io
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1391)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1457)
 
 ```cpp
 void file_i_o(){

diff --git a/docs/freq-map.md b/docs/freq-map.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/freq-map
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1401)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1467)
 
 ```cpp
 map<int, int> m;

diff --git a/docs/gr-inp-Fwt.md b/docs/gr-inp-Fwt.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/gr-inp-Fwt
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1412)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1478)
 
 ```cpp
 int e=f(n);

diff --git a/docs/gr-inp.md b/docs/gr-inp.md
@@ -5,7 +5,7 @@
 - ```
   https://thesobersobber.github.io/CP-Snippets/gr-inp
   ```
-- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1425)
+- [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L1491)
 
 ```cpp
 int e=f(n);
-Original file line number
+Diff line change
@@ Expand Up / @@ -5,7 +5,7 @@ @@
     - ```
       https://thesobersobber.github.io/CP-Snippets/Lazy Segtree
       ```
-    - [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L488)
+    - [github-snip-file](https://github.com/theSoberSobber/CP-Snippets/blob/main/snippets.json#L554)
     ```cpp
@@ Expand Down @@