Fenwick update + test point add range sum

cp-algo/structures/fenwick.hpp

@@ -9,7 +9,7 @@ namespace cp_algo::structures {
         Container data;
 
         fenwick(auto &&range) {
-            assign(range);
+            assign(move(range));
         }
         void to_prefix_sums() {
             for(size_t i = 1; i < n; i++) {

verify/structures/fenwick/point_add_range_sum.test.cpp

@@ -0,0 +1,35 @@
+// @brief Point Add Range Sum
+#define PROBLEM "https://judge.yosupo.jp/problem/point_add_range_sum"
+#pragma GCC optimize("Ofast,unroll-loops")
+#include "cp-algo/structures/fenwick.hpp"
+#include <bits/stdc++.h>
+
+using namespace std;
+
+void solve() {
+    int n, q;
+    cin >> n >> q;
+    vector<int64_t> a(n + 1);
+    for(auto &it: a | views::drop(1)) {cin >> it;}
+    cp_algo::structures::fenwick<int64_t> me(move(a));
+    for(int i = 0; i < q; i++) {
+        int t, x, y;
+        cin >> t >> x >> y;
+        if(t == 0) {
+            me.add(x, y);
+        } else {
+            cout << me.range_sum(x, y) << '\n';
+        }
+    }
+}
+
+signed main() {
+    //freopen("input.txt", "r", stdin);
+    ios::sync_with_stdio(0);
+    cin.tie(0);
+    int t; 
+    t = 1;// cin >> t;
+    while(t--) {
+        solve();
+    }
+}