Submission #465514

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
465514	2021-08-16 09:07:55	palilo	조개 줍기 (KOI17_shell)	C++17	100 / 100	494 ms	26788 KiB

shell

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#include <bits/stdc++.h>
using namespace std;
template <typename T>
class binary_indexed_tree {
    const size_t n;
    vector<T> tree;
public:
    binary_indexed_tree(size_t n) : n(n), tree(n + 1) {}
    // a[i] += val
    void update(size_t i, T val) {
        assert(0 <= i and i <= n);
        for (++i; i <= n; i += i & -i)
            tree[i] += val;
    }
    // sum in range [0...i)
    T query(size_t i) const {
        assert(0 <= i and i <= n);
        T ret = 0;
        for (; i; i &= i - 1)
            ret += tree[i];
        return ret;
    }
};
int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
#ifdef palilo
 
 
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• Subtask 1: 12 / 12
• Subtask 2: 34 / 34
• Subtask 3: 54 / 54