Submission #485271

#	Time	Username	Problem	Language	Result	Execution time	Memory
485271		MilosMilutinovic	Sterilizing Spray (JOI15_sterilizing)	C++14	10 / 100	53 ms	4516 KiB

sterilizing

/**
 *    author: m371
 *    created: 06.11.2021 23:29:50
**/
#include <bits/stdc++.h>

using namespace std;

template <typename T>
class fenwick {
  public:
  vector<T> fenw;
  int n;
  fenwick(int _n) : n(_n) {
    fenw.resize(n);
  }
  void modify(int x, T v) {
    while (x < n) {
      fenw[x] += v;
      x |= (x + 1);
    }
  }
  T get(int x) {
    T v{};
    while (x >= 0) {
      v += fenw[x];
      x = (x & (x + 1)) - 1;
    }
    return v;
  }
};

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, q, k;
  cin >> n >> q >> k;
  vector<int> a(n);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  if (k == 1) {
    fenwick<long long> fenw(n);
    for (int i = 0; i < n; i++) {
      fenw.modify(i, a[i]);
    }
    while (q--) {
      int foo;
      cin >> foo;
      if (foo == 1) {
        int pos, val;
        cin >> pos >> val;
        --pos;
        fenw.modify(pos, val - a[pos]);
        a[pos] = val;
      }
      if (foo == 2) {
        int l, r;
        cin >> l >> r;
      }
      if (foo == 3) {
        int l, r;
        cin >> l >> r;
        --l, --r;
        cout << fenw.get(r) - fenw.get(l - 1) << '\n';
      }
    }
  } else {
    
  }
  return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 75