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Diffstat (limited to 'content/datastructures/fenwickTree.cpp')
| -rw-r--r-- | content/datastructures/fenwickTree.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/content/datastructures/fenwickTree.cpp b/content/datastructures/fenwickTree.cpp index eb5cd73..7013613 100644 --- a/content/datastructures/fenwickTree.cpp +++ b/content/datastructures/fenwickTree.cpp @@ -1,7 +1,7 @@ vector<ll> tree; void update(int i, ll val) { - for (i++; i < sz(tree); i += i & -i) tree[i] += val; + for (i++; i < ssize(tree); i += i & -i) tree[i] += val; } void init(int n) { @@ -10,6 +10,6 @@ void init(int n) { ll prefix_sum(int i) { ll sum = 0; - for (i++; i > 0; i -= i & -i) sum += tree[i]; + for (; i > 0; i &= i-1) sum += tree[i]; return sum; } |