답안 #75551

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
75551	2018-09-10T09:23:04 Z	noclever	Vudu (COCI15_vudu)	C++14	98 / 140	1000 ms	66560 KB

vudu

#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
 
using namespace std;
 
template<typename T>
class fenwick {
  private:
    int n;
    vector<T> fenw;
  public:
 
    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;
  cin >> n;
  vector<long long> a(n);
  vector<long long> b(n);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  long long p;
  cin >> p;
  for (int i = 0; i < n; i++) {
    a[i] -= p;
  }
  b[0] = a[0];
  for (int i = 1; i < n; i++) {
    a[i] += a[i - 1];
    b[i] = a[i];
  } 
  sort(b.begin(), b.end());
  b.erase( unique( b.begin(), b.end() ), b.end() );
  map<int, int> mp;
  for (int i = 0; i < n; i++) {
    mp[i] = lower_bound(b.begin(), b.end(), a[i]) - b.begin();
  }
  fenwick<int> fenw(n);
  long long ans = 0ll;
  for (int i = 0; i < n; i++) {
    if (a[i] >= 0) {
      ans++;
    }
    int tmp = mp[i];
    ans += (fenw.get(tmp));
    fenw.modify(tmp, +1);
  }
  cout << ans << endl;
  return 0;
}

Subtask #1

98.0 / 140.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	888 KB	Output is correct
2	Correct	5 ms	892 KB	Output is correct
3	Correct	5 ms	892 KB	Output is correct
4	Execution timed out	1026 ms	64720 KB	Time limit exceeded
5	Correct	523 ms	64720 KB	Output is correct
6	Correct	859 ms	64720 KB	Output is correct
7	Correct	901 ms	64720 KB	Output is correct
8	Correct	773 ms	64720 KB	Output is correct
9	Runtime error	753 ms	66560 KB	Execution killed with signal 9 (could be triggered by violating memory limits)
10	Runtime error	872 ms	66560 KB	Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience.