oj.uz

답안 #917716

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
917716 2024-01-28T16:39:34 Z duckindog 가로등 (APIO19_street_lamps) C++14
100 / 100
 4141 ms 106412 KB 
//from duckindog wth depression
#include<bits/stdc++.h>

using namespace std;

const int N = 3e5 + 10;
int n, q;
bool a[N], b[N];
struct Query {
  int ty, x, y;
  Query() : ty(0), x(0), y(0) {}
  Query(int ty, int x, int y) : ty(ty), x(x), y(y) {}
} Q[N];

int f[4 * N];
void build(int s, int l, int r) {
  if (l == r) {
    f[s] = a[l];
    return;
  }
  int mid = l + r >> 1;
  build(s * 2, l, mid); build(s * 2 + 1, mid + 1, r);
  f[s] = min(f[s * 2], f[s * 2 + 1]);
}
void update(int s, int l, int r, int x, int y) {
  if (y < l || y > r) return;
  if (l == r) {
    f[s] = x;
    return;
  }
  int mid = l + r >> 1;
  update(s * 2, l, mid, x, y); update(s * 2 + 1, mid + 1, r, x, y);
  f[s] = min(f[s * 2], f[s * 2 + 1]);
}
int query(int s, int l, int r, int u, int v) {
  if (v < l || u > r) return 1;
  if (u <= l && r <= v) return f[s];
  int mid = l + r >> 1;
  return min(query(s * 2, l, mid, u, v), query(s * 2 + 1, mid + 1, r, u, v));
}
int get(int x, bool w) {
  int ret = x;
  int l, r;
  if (w) l = x, r = n;
  else l = 1, r = x;

  while (l <= r) {
    int mid = l + r >> 1;
    bool s = (w == 1 ? query(1, 1, n, x, mid) : query(1, 1, n, mid, x));

    if (s) {
      if (w) l = (ret = mid) + 1;
      else r = (ret = mid) - 1;
    } else {
      if (w) r = mid - 1;
      else l = mid + 1;
    }
  }
  return ret;

}

vector<int> bit[N], vt[N];
void upd(int i, int j, int x) {
  for (; i; i -= i & -i) {
    auto p = lower_bound(vt[i].begin(), vt[i].end(), j) - vt[i].begin() + 1;
    for (int t = p; t <= vt[i].size(); t += t & -t) bit[i][t] += x;
  }
}
int que(int i, int j) {
  int ret = 0;
  for (; i <= n; i += i & -i) {
    auto p = upper_bound(vt[i].begin(), vt[i].end(), j) - vt[i].begin();
    for (int t = p; t; t -= t & -t) ret += bit[i][t];
  }
  return ret;
}

int32_t main() {
  cin.tie(0)->sync_with_stdio(0);

  if (fopen("duck.inp", "r")) {
    freopen("duck.inp", "r", stdin);
    freopen("duck.out", "w", stdout);
  }
  cin >> n >> q;
  for (int i = 1; i <= n; ++i) {
    char x; cin >> x;
    a[i] = b[i] = (x == '1');
  }

  vector<pair<int, int>> updlist;
  build(1, 1, n);
  for (int i = 1; i <= q; ++i) {
    string ty; cin >> ty;
    if (ty == "toggle") {
      int x; cin >> x;
      a[x] = 1 - a[x];
      update(1, 1, n, a[x], x);
      int l = (a[x - 1] == 1 ? get(x - 1, 0) : x), r = (a[x + 1] == 1 ? get(x + 1, 1) : x);
      updlist.push_back({x, x});
      updlist.push_back({l - 1, x});
      updlist.push_back({x, r + 1});
      updlist.push_back({l - 1, r + 1});

      Q[i] = {0, x, 0};

    } else {
      int x, y; cin >> x >> y;
      Q[i] = {1, x, y - 1};
    }
  }
  sort(updlist.begin(), updlist.end());
  updlist.resize(unique(updlist.begin(), updlist.end()) - updlist.begin());
  for (auto duck : updlist) {
    int x, y; tie(x, y) = duck;
    for (int i = x; i; i -= i & -i) vt[i].push_back(y);
  }
  for (int i = 1; i <= n; ++i) {
    sort(vt[i].begin(), vt[i].end());
    vt[i].resize(unique(vt[i].begin(), vt[i].end()) - vt[i].begin());
    bit[i].resize(vt[i].size() + 5);
  }
  for (int i = 1; i <= n; ++i) a[i] = b[i];
  build(1, 1, n);

  for (int i = 1; i <= q; ++i) {
    int ty = Q[i].ty, x = Q[i].x, y = Q[i].y;
    if (!ty) {
      a[x] = 1 - a[x];
      update(1, 1, n, a[x], x);
      int l = (a[x - 1] == 1 ? get(x - 1, 0) : x), r = (a[x + 1] == 1 ? get(x + 1, 1) : x);
      if (a[x]) {
        upd(x, x, -i);
        upd(l - 1, x, i);
        upd(x, r + 1, i);
        upd(l - 1, r + 1, -i);
      } else {
        upd(x, x, i);
        upd(l - 1, x, -i);
        upd(x, r + 1, -i);
        upd(l - 1, r + 1, i);
      }


    } else {
      if (!query(1, 1, n, x, y)) cout << que(x, y) << "\n";
      else cout << i + que(x, y) << '\n';
    }

  }

}

Compilation message

street_lamps.cpp: In function 'void build(int, int, int)':
street_lamps.cpp:21:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   21 |   int mid = l + r >> 1;
      |             ~~^~~
street_lamps.cpp: In function 'void update(int, int, int, int, int)':
street_lamps.cpp:31:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   31 |   int mid = l + r >> 1;
      |             ~~^~~
street_lamps.cpp: In function 'int query(int, int, int, int, int)':
street_lamps.cpp:38:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   38 |   int mid = l + r >> 1;
      |             ~~^~~
street_lamps.cpp: In function 'int get(int, bool)':
street_lamps.cpp:48:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   48 |     int mid = l + r >> 1;
      |               ~~^~~
street_lamps.cpp: In function 'void upd(int, int, int)':
street_lamps.cpp:67:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |     for (int t = p; t <= vt[i].size(); t += t & -t) bit[i][t] += x;
      |                     ~~^~~~~~~~~~~~~~~
street_lamps.cpp: In function 'int32_t main()':
street_lamps.cpp:83:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   83 |     freopen("duck.inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
street_lamps.cpp:84:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   84 |     freopen("duck.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 19036 KB Output is correct
2 Correct 5 ms 19036 KB Output is correct
3 Correct 5 ms 19068 KB Output is correct
4 Correct 5 ms 19036 KB Output is correct
5 Correct 5 ms 19032 KB Output is correct
6 Correct 5 ms 19036 KB Output is correct
7 Correct 5 ms 19036 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 295 ms 30912 KB Output is correct
2 Correct 402 ms 29472 KB Output is correct
3 Correct 828 ms 31680 KB Output is correct
4 Correct 2059 ms 75548 KB Output is correct
5 Correct 2299 ms 69444 KB Output is correct
6 Correct 2459 ms 77364 KB Output is correct
7 Correct 158 ms 39164 KB Output is correct
8 Correct 163 ms 40428 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 19288 KB Output is correct
2 Correct 10 ms 19036 KB Output is correct
3 Correct 7 ms 19036 KB Output is correct
4 Correct 5 ms 19036 KB Output is correct
5 Correct 4141 ms 106412 KB Output is correct
6 Correct 3490 ms 92344 KB Output is correct
7 Correct 2415 ms 68920 KB Output is correct
8 Correct 258 ms 40556 KB Output is correct
9 Correct 82 ms 22616 KB Output is correct
10 Correct 94 ms 22924 KB Output is correct
11 Correct 89 ms 23144 KB Output is correct
12 Correct 215 ms 39460 KB Output is correct
13 Correct 214 ms 40528 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 19036 KB Output is correct
2 Correct 7 ms 19288 KB Output is correct
3 Correct 9 ms 19032 KB Output is correct
4 Correct 9 ms 19036 KB Output is correct
5 Correct 334 ms 40244 KB Output is correct
6 Correct 1553 ms 62788 KB Output is correct
7 Correct 2475 ms 77184 KB Output is correct
8 Correct 3870 ms 95196 KB Output is correct
9 Correct 588 ms 30144 KB Output is correct
10 Correct 453 ms 38840 KB Output is correct
11 Correct 590 ms 29740 KB Output is correct
12 Correct 452 ms 38584 KB Output is correct
13 Correct 587 ms 29552 KB Output is correct
14 Correct 453 ms 38588 KB Output is correct
15 Correct 237 ms 39476 KB Output is correct
16 Correct 247 ms 40684 KB Output is correct

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 19036 KB Output is correct
2 Correct 5 ms 19036 KB Output is correct
3 Correct 5 ms 19068 KB Output is correct
4 Correct 5 ms 19036 KB Output is correct
5 Correct 5 ms 19032 KB Output is correct
6 Correct 5 ms 19036 KB Output is correct
7 Correct 5 ms 19036 KB Output is correct
8 Correct 295 ms 30912 KB Output is correct
9 Correct 402 ms 29472 KB Output is correct
10 Correct 828 ms 31680 KB Output is correct
11 Correct 2059 ms 75548 KB Output is correct
12 Correct 2299 ms 69444 KB Output is correct
13 Correct 2459 ms 77364 KB Output is correct
14 Correct 158 ms 39164 KB Output is correct
15 Correct 163 ms 40428 KB Output is correct
16 Correct 11 ms 19288 KB Output is correct
17 Correct 10 ms 19036 KB Output is correct
18 Correct 7 ms 19036 KB Output is correct
19 Correct 5 ms 19036 KB Output is correct
20 Correct 4141 ms 106412 KB Output is correct
21 Correct 3490 ms 92344 KB Output is correct
22 Correct 2415 ms 68920 KB Output is correct
23 Correct 258 ms 40556 KB Output is correct
24 Correct 82 ms 22616 KB Output is correct
25 Correct 94 ms 22924 KB Output is correct
26 Correct 89 ms 23144 KB Output is correct
27 Correct 215 ms 39460 KB Output is correct
28 Correct 214 ms 40528 KB Output is correct
29 Correct 6 ms 19036 KB Output is correct
30 Correct 7 ms 19288 KB Output is correct
31 Correct 9 ms 19032 KB Output is correct
32 Correct 9 ms 19036 KB Output is correct
33 Correct 334 ms 40244 KB Output is correct
34 Correct 1553 ms 62788 KB Output is correct
35 Correct 2475 ms 77184 KB Output is correct
36 Correct 3870 ms 95196 KB Output is correct
37 Correct 588 ms 30144 KB Output is correct
38 Correct 453 ms 38840 KB Output is correct
39 Correct 590 ms 29740 KB Output is correct
40 Correct 452 ms 38584 KB Output is correct
41 Correct 587 ms 29552 KB Output is correct
42 Correct 453 ms 38588 KB Output is correct
43 Correct 237 ms 39476 KB Output is correct
44 Correct 247 ms 40684 KB Output is correct
45 Correct 102 ms 25548 KB Output is correct
46 Correct 200 ms 24780 KB Output is correct
47 Correct 1113 ms 46592 KB Output is correct
48 Correct 2141 ms 74932 KB Output is correct
49 Correct 102 ms 23188 KB Output is correct
50 Correct 106 ms 23128 KB Output is correct
51 Correct 100 ms 23300 KB Output is correct
52 Correct 110 ms 23556 KB Output is correct
53 Correct 101 ms 23560 KB Output is correct
54 Correct 106 ms 23744 KB Output is correct