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#define PROBLEM "https://onlinejudge.u-aizu.ac.jp/courses/library/3/DSL/2/DSL_2_B" #include <bits/stdc++.h> using namespace std; #include "../segtree/fenwick-tree.cpp" int main() { int n, q; cin >> n >> q; FenwickTree<int> bit(n); for(int i = 0; i < q; i++) { int c, x, y; cin >> c >> x >> y; if(c) cout << bit.sum(x - 1, y) << "\n"; else bit.add(x - 1, y); } }
#line 1 "test/AOJ-DLS-2-B.test.cpp" #define PROBLEM "https://onlinejudge.u-aizu.ac.jp/courses/library/3/DSL/2/DSL_2_B" #include <bits/stdc++.h> using namespace std; #line 2 "segtree/fenwick-tree.cpp" #line 4 "segtree/fenwick-tree.cpp" using namespace std; template <typename T> class FenwickTree { private: int _n; vector<T> data; T sum(int r) { T s = 0; while(r > 0) { s += data[r - 1]; r -= r & -r; } return s; } public: FenwickTree() = default; explicit FenwickTree(int n) : _n(n), data(n) {} void add(int p, T x) { assert(0 <= p && p < _n); p++; while(p <= _n) { data[p - 1] += x; p += p & -p; } } T sum(int l, int r) { assert(0 <= l && l <= r && r <= _n); return sum(r) - sum(l); } }; /* * @brief Fenwick-Tree * @docs docs/fenwick-tree.md */ #line 7 "test/AOJ-DLS-2-B.test.cpp" int main() { int n, q; cin >> n >> q; FenwickTree<int> bit(n); for(int i = 0; i < q; i++) { int c, x, y; cin >> c >> x >> y; if(c) cout << bit.sum(x - 1, y) << "\n"; else bit.add(x - 1, y); } }