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- void add(int ind, int v)
- {
- for (int i = ind; i < N; i += i&-i)
- t[i] += v;
- }
- int get(int ind)
- {
- if (ind <= 0)
- return 0;
- int cnt = 0;
- for (int i = ind; i; i -= i&-i)
- cnt += t[i];
- return cnt;
- }
- int get(int l, int r)
- {
- return get(r) - get(l - 1);
- }
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