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Time
1011:问题描述最后一行[l,r] [1,n]中少了一个符号,已修改。
2016-10-04 14:00:57
1011:代码中第二行应为for (int i = x; i != 0; i -= i & (-i)),最后一行应为 a[i] += t; ,已修改。
2016-10-04 13:37:40