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Seg tree nit #167

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lrvideckis wants to merge 3 commits into from
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Seg tree nit #167

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700c9fd
nit
lrvideckis Jan 15, 2026
45cab6f
[auto-verifier] verify commit 700c9fd9924a8e807b6b126db2b6ed38a82e6e3a
web-flow Jan 15, 2026
9b0ec89
more init methods
lrvideckis Jan 15, 2026
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4 changes: 2 additions & 2 deletions .verify-helper/timestamps.remote.json
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Original file line number Diff line number Diff line change
Expand Up @@ -46,8 +46,8 @@
"tests/library_checker_aizu_tests/data_structures/rmq_sparse_table.test.cpp": "2025-08-14 12:01:15 -0600",
"tests/library_checker_aizu_tests/data_structures/rmq_sparse_table_inc.test.cpp": "2024-12-15 14:34:10 -0600",
"tests/library_checker_aizu_tests/data_structures/simple_tree.test.cpp": "2024-12-14 15:47:13 -0600",
"tests/library_checker_aizu_tests/data_structures/simple_tree_inc.test.cpp": "2024-12-21 00:23:10 -0500",
"tests/library_checker_aizu_tests/data_structures/simple_tree_inc_line.test.cpp": "2024-12-21 00:23:10 -0500",
"tests/library_checker_aizu_tests/data_structures/simple_tree_inc.test.cpp": "2026-01-15 14:21:06 -0700",
"tests/library_checker_aizu_tests/data_structures/simple_tree_inc_line.test.cpp": "2026-01-15 14:21:06 -0700",
"tests/library_checker_aizu_tests/data_structures/simple_tree_line.test.cpp": "2024-12-14 15:47:13 -0600",
"tests/library_checker_aizu_tests/flow/dinic_aizu.test.cpp": "2024-11-17 14:04:03 -0600",
"tests/library_checker_aizu_tests/flow/hungarian.test.cpp": "2024-11-17 14:04:03 -0600",
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14 changes: 6 additions & 8 deletions library/data_structures/seg_tree_inc.hpp
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Original file line number Diff line number Diff line change
@@ -1,13 +1,11 @@
#pragma once
//! https://codeforces.com/blog/entry/118682
//! @code
//! {
//! tree_inc st(n, pii{}, [&](pii& l, pii& r) {
//! return min(l, r);
//! });
//! }
//! tree_inc st(n, int{}, ranges::min);
//! rep(i, 0, n) st.update(i, a[i]);
//! tree_inc st1(n, pii(0, 0), [&](pii& l, pii& r) {
//! return min(l, r);
//! });
//! tree_inc st2(n, (int)0, ranges::min);
//! tree_inc st3(n, (ll)0, plus<ll>{});
//! @endcode
//! @time O(n + q log n)
//! @space O(n)
Expand All @@ -19,7 +17,7 @@ template<class T, class F> struct tree_inc {
int n;
F op;
vector<T> s;
tree_inc(int n, T, F op): n(n), op(op), s(2 * n) {}
tree_inc(int n, T x, F op): n(n), op(op), s(2 * n, x) {}
void update(int i, T val) {
for (s[i += n] = val; i /= 2;)
s[i] = op(s[2 * i], s[2 * i + 1]);
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