diff --git a/src/data_structures/fenwick.md b/src/data_structures/fenwick.md index 82755b452..d423f9289 100644 --- a/src/data_structures/fenwick.md +++ b/src/data_structures/fenwick.md @@ -58,7 +58,7 @@ def sum(int r): return res def increase(int i, int delta): - for all j with g(j) <= i <= j: + for all j with g(i) <= j <= i: t[j] += delta ```