# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
43186 | jwvg0425 | 즐거운 사진 수집 (JOI13_collecting) | C++14 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
class FenwickTree
{
public:
FenwickTree(int k)
{
data.resize(k);
}
i64 sum(int n)
{
i64 ans = 0;
while (n > 0)
{
ans += data[n];
n -= (n & -n);
}
return ans;
}
void add(int n, i64 num)
{
while (n < data.size())
{
data[n] += num;
n += (n & -n);
}
}
private:
vector<i64> data;
};