Dhruv Aggarwal medhruv7
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| int N, M; | |
| int bit[MAXN][MAXN]; | |
| int sum(int x, int y) { | |
| int ret = 0; | |
| for (int i = x; i >= 0; i = (i & (i + 1)) - 1) | |
| for (int j = y; j >= 0; j = (j & (j + 1)) - 1) | |
| ret += bit[i][j]; | |
| return ret; | |
| } | |
| void add(int x, int y, int delta) { |