Submission #516421

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
516421	2022-01-21 09:51:10	KoD	Index (COCI21_index)	C++17	60 / 110	2575 ms	11812 KiB

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#include <bits/stdc++.h>
using std::vector;
using std::array;
using std::pair;
using std::tuple;
struct Fenwick {
    int size;
    vector<int> data;
    Fenwick(const int n) : size(n), data(n + 1) {}
    void add(int i, const int x) {
        i += 1;
        while (i <= size) {
            data[i] += x;
            i += i & -i;
        }
    }
    int pref(int i) const {
        int ret = 0;
        while (i > 0) {
            ret += data[i];
            i -= i & -i;
        }
        return ret;
    }
    int fold(int l, int r) const {
        return pref(r) - pref(l);
    }
    void clear() {
 
 
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• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 0 / 50