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답안 #758787

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
758787 2023-06-15T10:03:18 Z mgl_diamond Examination (JOI19_examination) C++14
100 / 100
 995 ms 329880 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ii = pair<int, int>;
 
#define foru(i, l, r) for(int i=(l); i<=(r); ++i)
#define ford(i, l, r) for(int i=(l; i>=(r); --i)
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)x.size()
#define fi first
#define se second
#define C make_pair
 
using dt = pair<ii, int>;
const int N = 2e5+5;
const int INF = 1e9;
const int SQRT = sqrt(N);

int debug = 0;

struct trie {
  struct node {
    int nxt[2], cnt = 0;
    node() { nxt[0] = nxt[1] = -1; cnt = 0; }
  };

  vector<node> trie;

  void built() {
    trie.push_back(node());
  }

  void add(int num) {
    for(int i=30, cur=0; i>=0; --i) {
      int bit = num>>i&1;
      if (trie[cur].nxt[bit] == -1) {
        trie[cur].nxt[bit] = trie.size();
        trie.push_back(node());
      } 
      cur = trie[cur].nxt[bit];
      trie[cur].cnt += 1;
    }
  }

  int query(int val) {
    int ans = 0, cur = 0;
    for(int i=30; i>=0; --i) {
      int bit = val>>i&1;
      if (bit == 1) cur = trie[cur].nxt[1];
      else {
        if (trie[cur].nxt[1] != -1) ans += trie[trie[cur].nxt[1]].cnt;
        cur = trie[cur].nxt[0];
      }
      if (cur == -1) return ans;
    }
    assert(cur != -1);
    return ans + trie[cur].cnt;
  }
};

int n, ny, q, ret[N];
int qx[N], qy[N], qz[N];
vector<int> vy;
vector<ii> a(N);
vector<dt> evts;
vector<trie> bit(N);

bool cmp(dt a, dt b) {
  if (a.fi.fi != b.fi.fi) return a.fi.fi > b.fi.fi;
  return a.se < b.se;
}

int pos(int val) {
  int id = upper_bound(all(vy), val) - vy.begin();
  return id;
}

void upd(int i, int v) {
  for(i=ny-i+1; i<=ny; i+=i&-i) bit[i].add(v);
}

int query(int i, int v) {
  int ans = 0;
  for(i=ny-i+1; i>0; i-=i&-i) ans += bit[i].query(v);
  return ans;
}

void solve() {
  cin >> n >> q;

  for(int i=1; i<=n; ++i) {
    cin >> a[i].fi >> a[i].se;
    vy.push_back(a[i].se);
    evts.push_back(C(C(a[i].fi, i), 0));
  }

  for(int i=1; i<=q; ++i) {
    int x, y, z;
    cin >> x >> y >> z;
    qx[i] = x; qy[i] = y; qz[i] = z;
    vy.push_back(y);
    evts.push_back(C(C(x, i), 1));
  } 

  sort(all(evts), cmp);
  sort(all(vy));
  vy.resize(unique(all(vy)) - vy.begin());
  ny = vy.size();

  // for(int x : vy) cout << x << " ";
  // cout << "\n";

  for(int i=0; i<=ny; ++i) {
    bit[i].built();
  }

  // upd(3, 120);
  // upd(6, 140);
  // cout << bit[3].query(80);
  // cout << query(5, 80) << "\n";

  for(auto e : evts) {
    // cout << pos(10) << "\n";
    // cout << e.fi.fi << " " << e.se << "\n";
    if (e.se == 0) {
      int i = e.fi.se;
      upd(pos(a[i].se), a[i].fi + a[i].se);
      // cout << "update pos " << pos(a[i].se) << " value " << a[i].fi + a[i].se << "\n";
    } else {
      int i = e.fi.se;
      int val = qx[i] + qy[i] + max(0, qz[i] - (qx[i] + qy[i]));
      // assert(pos(qy[i]) <= ny);
      ret[i] = query(pos(qy[i]), val);
      // cout << "query pos " << pos(qy[i]) << " greater than " << val << "\n";
    }
  }

  for(int i=1; i<=q; ++i) {
    cout << ret[i] << "\n";
  }
}

int main() {
  ios::sync_with_stdio(0);
  cin.tie(0); cout.tie(0);
 
  if (fopen("input.inp", "r")) {
    freopen("input.inp", "r", stdin);
    freopen("input.out", "w", stdout);
  }
 
  solve();
}

Compilation message

examination.cpp: In function 'int main()':
examination.cpp:148:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  148 |     freopen("input.inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
examination.cpp:149:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  149 |     freopen("input.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 6564 KB Output is correct
2 Correct 3 ms 6612 KB Output is correct
3 Correct 3 ms 6604 KB Output is correct
4 Correct 3 ms 6604 KB Output is correct
5 Correct 3 ms 6612 KB Output is correct
6 Correct 3 ms 6612 KB Output is correct
7 Correct 15 ms 14348 KB Output is correct
8 Correct 16 ms 14252 KB Output is correct
9 Correct 19 ms 14288 KB Output is correct
10 Correct 9 ms 9028 KB Output is correct
11 Correct 15 ms 13616 KB Output is correct
12 Correct 6 ms 6876 KB Output is correct
13 Correct 16 ms 14280 KB Output is correct
14 Correct 15 ms 14336 KB Output is correct
15 Correct 16 ms 14316 KB Output is correct
16 Correct 14 ms 13564 KB Output is correct
17 Correct 6 ms 7824 KB Output is correct
18 Correct 6 ms 6868 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 659 ms 157636 KB Output is correct
2 Correct 680 ms 159916 KB Output is correct
3 Correct 657 ms 159960 KB Output is correct
4 Correct 125 ms 27596 KB Output is correct
5 Correct 553 ms 78548 KB Output is correct
6 Correct 89 ms 13008 KB Output is correct
7 Correct 681 ms 159932 KB Output is correct
8 Correct 657 ms 155564 KB Output is correct
9 Correct 645 ms 155044 KB Output is correct
10 Correct 452 ms 69940 KB Output is correct
11 Correct 84 ms 17584 KB Output is correct
12 Correct 55 ms 12612 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 659 ms 157636 KB Output is correct
2 Correct 680 ms 159916 KB Output is correct
3 Correct 657 ms 159960 KB Output is correct
4 Correct 125 ms 27596 KB Output is correct
5 Correct 553 ms 78548 KB Output is correct
6 Correct 89 ms 13008 KB Output is correct
7 Correct 681 ms 159932 KB Output is correct
8 Correct 657 ms 155564 KB Output is correct
9 Correct 645 ms 155044 KB Output is correct
10 Correct 452 ms 69940 KB Output is correct
11 Correct 84 ms 17584 KB Output is correct
12 Correct 55 ms 12612 KB Output is correct
13 Correct 747 ms 160876 KB Output is correct
14 Correct 722 ms 160604 KB Output is correct
15 Correct 684 ms 160040 KB Output is correct
16 Correct 138 ms 26788 KB Output is correct
17 Correct 548 ms 78520 KB Output is correct
18 Correct 91 ms 13032 KB Output is correct
19 Correct 730 ms 160668 KB Output is correct
20 Correct 721 ms 160176 KB Output is correct
21 Correct 758 ms 159120 KB Output is correct
22 Correct 429 ms 70092 KB Output is correct
23 Correct 84 ms 17640 KB Output is correct
24 Correct 57 ms 12704 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 6564 KB Output is correct
2 Correct 3 ms 6612 KB Output is correct
3 Correct 3 ms 6604 KB Output is correct
4 Correct 3 ms 6604 KB Output is correct
5 Correct 3 ms 6612 KB Output is correct
6 Correct 3 ms 6612 KB Output is correct
7 Correct 15 ms 14348 KB Output is correct
8 Correct 16 ms 14252 KB Output is correct
9 Correct 19 ms 14288 KB Output is correct
10 Correct 9 ms 9028 KB Output is correct
11 Correct 15 ms 13616 KB Output is correct
12 Correct 6 ms 6876 KB Output is correct
13 Correct 16 ms 14280 KB Output is correct
14 Correct 15 ms 14336 KB Output is correct
15 Correct 16 ms 14316 KB Output is correct
16 Correct 14 ms 13564 KB Output is correct
17 Correct 6 ms 7824 KB Output is correct
18 Correct 6 ms 6868 KB Output is correct
19 Correct 659 ms 157636 KB Output is correct
20 Correct 680 ms 159916 KB Output is correct
21 Correct 657 ms 159960 KB Output is correct
22 Correct 125 ms 27596 KB Output is correct
23 Correct 553 ms 78548 KB Output is correct
24 Correct 89 ms 13008 KB Output is correct
25 Correct 681 ms 159932 KB Output is correct
26 Correct 657 ms 155564 KB Output is correct
27 Correct 645 ms 155044 KB Output is correct
28 Correct 452 ms 69940 KB Output is correct
29 Correct 84 ms 17584 KB Output is correct
30 Correct 55 ms 12612 KB Output is correct
31 Correct 747 ms 160876 KB Output is correct
32 Correct 722 ms 160604 KB Output is correct
33 Correct 684 ms 160040 KB Output is correct
34 Correct 138 ms 26788 KB Output is correct
35 Correct 548 ms 78520 KB Output is correct
36 Correct 91 ms 13032 KB Output is correct
37 Correct 730 ms 160668 KB Output is correct
38 Correct 721 ms 160176 KB Output is correct
39 Correct 758 ms 159120 KB Output is correct
40 Correct 429 ms 70092 KB Output is correct
41 Correct 84 ms 17640 KB Output is correct
42 Correct 57 ms 12704 KB Output is correct
43 Correct 962 ms 329880 KB Output is correct
44 Correct 941 ms 328728 KB Output is correct
45 Correct 908 ms 327408 KB Output is correct
46 Correct 193 ms 80780 KB Output is correct
47 Correct 855 ms 238832 KB Output is correct
48 Correct 97 ms 12852 KB Output is correct
49 Correct 995 ms 329392 KB Output is correct
50 Correct 927 ms 325600 KB Output is correct
51 Correct 994 ms 325292 KB Output is correct
52 Correct 792 ms 238884 KB Output is correct
53 Correct 105 ms 38548 KB Output is correct