Submission #671080

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
671080	2022-12-11 22:56:29	SirCovidThe19th	Index (COCI21_index)	C++17	110 / 110	1266 ms	58688 KiB

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#include <bits/stdc++.h>
using namespace std; 
template<class T, int sz> struct persistentSegTree{
    static const int maxSz = sz * 31;
    T seg[maxSz]; int idx = 1, lc[maxSz], rc[maxSz];
    void dup(int &i){
        lc[idx] = lc[i];
        rc[idx] = rc[i];
        seg[idx] = seg[i];
        i = idx; idx++;
    }
    void upd(int p, int &i, int l = 0, int r = 2e5 + 5){
        dup(i);
        if (l == r){ seg[i] = 1; return; }
        int mid = (l + r) / 2;
        if (p <= mid) upd(p, lc[i], l, mid);
        else upd(p, rc[i], mid + 1, r);
        seg[i] = seg[lc[i]] + seg[rc[i]];
    }
    T qry(int ql, int qr, int i, int l = 0, int r = 2e5 + 5){
        if (qr < l or ql > r or !i) return 0;
        if (l >= ql and r <= qr) return seg[i];
        int mid = (l + r) / 2;
        return qry(ql, qr, lc[i], l, mid) + qry(ql, qr, rc[i], mid + 1, r);
    }
 
 
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• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 50 / 50