more files

cses/range-queries/prefix-sum-queries.cc

@@ -0,0 +1,104 @@
+#include <bits/stdc++.h>  // {{{
+
+// https://codeforces.com/blog/entry/96344
+
+#pragma GCC optimize("O2,unroll-loops")
+#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
+
+using namespace std;
+
+template <typename T>
+[[nodiscard]] static T MIN() {
+  return std::numeric_limits<T>::min();
+}
+
+template <typename T>
+[[nodiscard]] static T MAX() {
+  return std::numeric_limits<T>::max();
+}
+
+template <typename T>
+[[nodiscard]] static T sc(auto&& x) {
+  return static_cast<T>(x);
+}
+
+template <typename T>
+[[nodiscard]] static T sz(auto&& x) {
+  return static_cast<T>(x.size());
+}
+
+#define prln(...) std::println(__VA_ARGS__)
+#define pr(...) std::print(__VA_ARGS__)
+
+#ifdef LOCAL
+#define dbgln(...) std::println(__VA_ARGS__)
+#define dbg(...) std::print(__VA_ARGS__)
+#endif
+
+using ll = long long;
+using ld = long double;
+template <typename T>
+using v = std::vector<T>;
+template <typename T, size_t N>
+using r = std::array<T, N>;
+template <typename T1, typename T2>
+using p = std::pair<T1, T2>;
+
+#define ff first
+#define ss second
+#define eb emplace_back
+#define pb push_back
+#define all(x) (x).begin(), (x).end()
+#define rall(x) (x).rbegin(), (x).rend()
+//  }}}
+
+void solve() {
+  int n, q;
+  cin >> n >> q;
+  v<ll> a(n);
+  for (auto& e : a) {
+    cin >> e;
+  }
+
+  /*
+     max prefix sum in range: segtree max()
+
+update: prefixes @ and after change
+
+have various prefix sums, and various deltas
+
+[p1, p2, p3, p4, p5, p6]
+[0, 1, -1, 2, -5, 3]
+
+construct segtree: RMaxQ
+update: everything after [a,] += delta
+     */
+
+  while (q--) {
+    char cmd;
+    cin >> cmd;
+    int u, l, r;
+    ll u;
+    if (cmd == '1') {
+      cin >> i >> u;
+    } else {
+      cin >> l >> r;
+      --l;
+      --r;
+    }
+  }
+}
+
+int main() {  // {{{
+  cin.tie(nullptr)->sync_with_stdio(false);
+  cin.exceptions(cin.failbit);
+
+  int t = 1;
+  // cin >> t;
+  while (t--) {
+    solve();
+  }
+
+  return 0;
+}
+// }}}

cses/range-queries/prefix-sum-queries.in

@@ -0,0 +1,6 @@
+8 4
+1 2 -1 3 1 -5 1 4
+2 2 6
+1 4 -2
+2 2 6
+2 3 4