Submission #894939

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
894939	2023-12-29 09:08:07	fanwen	Constellation 3 (JOI20_constellation3)	C++17	100 / 100	324 ms	60572 KiB

constellation3

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#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define ll long long
#define file(name)                  \
    if(fopen(name".inp", "r"))      \
        freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout);
template <class T> struct Fenwick_Tree {
    vector<T> bit;
    int n;
    Fenwick_Tree(int _n = 0) : n(_n), bit(_n + 5){}
    void clear() { fill(bit.begin(), bit.end(), T(0)); }
    void update(int u, T val) {
        for (; u <= n; u += u & -u) bit[u] += val;
    }
    void update(int l, int r, T val) {
        update(l, val);
        update(r + 1, -val);
    }
    T get(int u) {
        T ans = 0;
        for (; u; u -= u & -u) ans += bit[u];
 
 
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Compilation message (stderr)

constellation3.cpp: In instantiation of 'Fenwick_Tree<T>::Fenwick_Tree(int) [with T = long long int]':
constellation3.cpp:58:42:   required from here
constellation3.cpp:14:9: warning: 'Fenwick_Tree<long long int>::n' will be initialized after [-Wreorder]
   14 |     int n;
      |         ^
constellation3.cpp:13:15: warning:   'std::vector<long long int, std::allocator<long long int> > Fenwick_Tree<long long int>::bit' [-Wreorder]
   13 |     vector<T> bit;
      |               ^~~
constellation3.cpp:15:5: warning:   when initialized here [-Wreorder]
   15 |     Fenwick_Tree(int _n = 0) : n(_n), bit(_n + 5){}
      |     ^~~~~~~~~~~~
constellation3.cpp: In function 'int main()':
constellation3.cpp:10:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |         freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
constellation3.cpp:123:5: note: in expansion of macro 'file'
  123 |     file("JOI20_constellation3");
      |     ^~~~
constellation3.cpp:10:49: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |         freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout);
      |                                          ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
constellation3.cpp:123:5: note: in expansion of macro 'file'
  123 |     file("JOI20_constellation3");
      |     ^~~~

• Subtask 1: 14 / 14
• Subtask 2: 21 / 21
• Subtask 3: 65 / 65