oj.uz

Submission #1095073

# Submission time Handle Problem Language Result Execution time Memory
1095073 2024-10-01T08:24:57 Z vjudge1 Street Lamps (APIO19_street_lamps) C++17
100 / 100
 1223 ms 155800 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <cassert>
#include <cstring>
#include <set>
#include <functional>
#warning That's not the baby, that's my baby

#define debug(x) #x << " = " << x << '\n'
using ll = long long;

const int INF = 1e9;
const int NMAX = 3e5;

struct Query {
  int x, y;
};

std::string s;

std::set<int> lt;

Query Q[NMAX + 1];
int answer[NMAX + 1];

int rt[NMAX + 1];
int tt[NMAX + 1];

std::vector<std::tuple<int, int, int>> events;

int n;

void finish(int l, int t) {
  events.push_back({l, rt[l], t - tt[l]});
  tt[l] = t;
}

void printLeft() {
  std::cout << "\nLEFT POINTS:\n";
  for (const auto &p : lt) {
    std::cout << p << ' ';
  }
  std::cout << '\n';
}

void toggle(int pos, int t) {
  // std::cout << "\n\n\n";
  // std::cout << debug(t);
  // printLeft();
  if (s[pos] == 0) {
    auto it = lt.lower_bound(pos);
    int st = *prev(it);
    int dr = *it;
    if (st != -1 && dr == pos + 1 && rt[st] == pos - 1) {    
      finish(st, t);
      finish(dr, t);
      lt.erase(dr);
      rt[st] = rt[dr];
    } else if (dr == pos + 1) {
      finish(dr, t);
      lt.erase(dr);
      lt.insert(pos);
      rt[pos] = rt[dr];
      tt[pos] = t;
    } else if (st != -1 && rt[st] == pos - 1) {
      finish(st, t);
      rt[st] = pos;
    } else {
      rt[pos] = pos;
      lt.insert(pos);
      tt[pos] = t;
    }
  } else {
    // std::cout << debug(t);
    // std::cout << debug(pos);
    // printLeft();
    // if (t == 4) {
    //   std::cout << "HERE\n";
    // }
    auto it = lt.upper_bound(pos);
    it = prev(it);
    auto me = *it;
    finish(me, t);
    if (pos != rt[me]) {
      lt.insert(pos + 1);
      rt[pos + 1] = rt[me];
      tt[pos + 1] = t;
    }
    if (me == pos) {
      lt.erase(pos);
    } else {
     rt[me] = pos - 1;
      tt[me] = t;
    }
  }
}

void query(int l, int r, int t) {
  events.push_back({l, r, -(t + 1)});
  int me = *std::prev(lt.upper_bound(l));
  if (me != -1 && rt[me] >= r) {
    answer[t] += t - tt[me];
  }
}

std::vector<int> ys[NMAX + 1];
std::vector<ll> aib[NMAX + 1];

void updateDry(int x, int y, int v = 0) {
  for (; x <= NMAX; x += x & -x) {
    ys[x].push_back(y);
  }
}
void queryDry(int x, int y) {
  for (; x > 0; x -= x & -x) {
    ys[x].push_back(y);
  }
}
void build() {
  for (int i = 1; i <= NMAX; i++) {
    ys[i].push_back(0);
    ys[i].push_back(NMAX + 1);
    std::sort(ys[i].begin(), ys[i].end());
    ys[i].erase(std::unique(ys[i].begin(), ys[i].end()), ys[i].end());
    aib[i].resize((int) ys[i].size() + 1, 0);
  }
}

void updateWet(int x, int y, int v) {
  for (; x <= NMAX; x += x & -x) {
    for (int j = std::lower_bound(ys[x].begin(), ys[x].end(), y) - ys[x].begin(); j > 0; j -= j & -j) {
      aib[x][j] += v;
    }
  }
}
int queryWet(int x, int y) {
  int ret = 0;
  for (; x > 0; x -= x & -x) {
    for (int j = std::lower_bound(ys[x].begin(), ys[x].end(), y) - ys[x].begin(); j <= (int) ys[x].size(); j += j & -j) {
      ret += aib[x][j];
    }
  }
  return ret;
}

int main() {
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(0);
  std::cout.tie(0);
  #ifdef LOCAL
freopen("input.txt", "r", stdin);
  #endif

  int q;
  std::cin >> n >> q;

  std::cin >> s;
  s = '$' + s;

  lt.insert(-1);
  lt.insert(-2);
  lt.insert(n + 2);
  lt.insert(n + 3);
  
  for (int i = 1; i <= n; i++) {
    s[i] -= '0';
    if (s[i] == 1) {
      s[i] ^= 1;
      toggle(i, 0);
      s[i] ^= 1;
    }
  }

  for (int i = 1; i <= q; i++) {
    std::string type;
    std::cin >> type;
    if (type == "toggle") {
      std::cin >> Q[i].x;
      Q[i].y = -1;
      answer[i] = -1;
      toggle(Q[i].x, i);
      s[Q[i].x] ^= 1;
    } else {
      std::cin >> Q[i].x >> Q[i].y;
      Q[i].y--;
      answer[i] = 0;
      query(Q[i].x, Q[i].y, i);
    }
    // std::cout << "PASS\n";
  }
  
  for (const auto &[l, r, t] : events) {
    if (t >= 0) { // update
      updateDry(l, r, t);
    } else { // query
      queryDry(l, r);
    }
  }

  build();

  for (const auto &[l, r, t] : events) {
    if (t >= 0) {
      // std::cout << "update " << l << ' ' << r << ' ' << t << '\n';
      updateWet(l, r, t);
    } else {
      assert(1 <= -(t + 1) && -(t + 1) <= q);
      answer[-(t + 1)] += queryWet(l, r);
    }
  }

  for (int i = 1; i <= q; i++) {
    if (answer[i] != -1) {
      std::cout << answer[i] << '\n';
    }
  }

  return 0;
}

Compilation message

street_lamps.cpp:8:2: warning: #warning That's not the baby, that's my baby [-Wcpp]
    8 | #warning That's not the baby, that's my baby
      |  ^~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 33372 KB Output is correct
2 Correct 37 ms 33144 KB Output is correct
3 Correct 38 ms 33160 KB Output is correct
4 Correct 40 ms 33304 KB Output is correct
5 Correct 37 ms 33360 KB Output is correct
6 Correct 39 ms 33108 KB Output is correct
7 Correct 39 ms 33360 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 273 ms 58548 KB Output is correct
2 Correct 302 ms 58256 KB Output is correct
3 Correct 426 ms 59336 KB Output is correct
4 Correct 858 ms 92064 KB Output is correct
5 Correct 1065 ms 98728 KB Output is correct
6 Correct 885 ms 91560 KB Output is correct
7 Correct 665 ms 74420 KB Output is correct
8 Correct 1223 ms 151216 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 33372 KB Output is correct
2 Correct 38 ms 33372 KB Output is correct
3 Correct 37 ms 33364 KB Output is correct
4 Correct 40 ms 33636 KB Output is correct
5 Correct 715 ms 77996 KB Output is correct
6 Correct 877 ms 88232 KB Output is correct
7 Correct 1056 ms 101996 KB Output is correct
8 Correct 1149 ms 155800 KB Output is correct
9 Correct 125 ms 46016 KB Output is correct
10 Correct 134 ms 47132 KB Output is correct
11 Correct 137 ms 47540 KB Output is correct
12 Correct 633 ms 79272 KB Output is correct
13 Correct 1139 ms 155660 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 33360 KB Output is correct
2 Correct 40 ms 33448 KB Output is correct
3 Correct 41 ms 33360 KB Output is correct
4 Correct 40 ms 33360 KB Output is correct
5 Correct 810 ms 95664 KB Output is correct
6 Correct 818 ms 94120 KB Output is correct
7 Correct 814 ms 91336 KB Output is correct
8 Correct 883 ms 87732 KB Output is correct
9 Correct 343 ms 60472 KB Output is correct
10 Correct 363 ms 66484 KB Output is correct
11 Correct 344 ms 60592 KB Output is correct
12 Correct 335 ms 66524 KB Output is correct
13 Correct 344 ms 60520 KB Output is correct
14 Correct 343 ms 66740 KB Output is correct
15 Correct 622 ms 79308 KB Output is correct
16 Correct 1148 ms 155676 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 33372 KB Output is correct
2 Correct 37 ms 33144 KB Output is correct
3 Correct 38 ms 33160 KB Output is correct
4 Correct 40 ms 33304 KB Output is correct
5 Correct 37 ms 33360 KB Output is correct
6 Correct 39 ms 33108 KB Output is correct
7 Correct 39 ms 33360 KB Output is correct
8 Correct 273 ms 58548 KB Output is correct
9 Correct 302 ms 58256 KB Output is correct
10 Correct 426 ms 59336 KB Output is correct
11 Correct 858 ms 92064 KB Output is correct
12 Correct 1065 ms 98728 KB Output is correct
13 Correct 885 ms 91560 KB Output is correct
14 Correct 665 ms 74420 KB Output is correct
15 Correct 1223 ms 151216 KB Output is correct
16 Correct 40 ms 33372 KB Output is correct
17 Correct 38 ms 33372 KB Output is correct
18 Correct 37 ms 33364 KB Output is correct
19 Correct 40 ms 33636 KB Output is correct
20 Correct 715 ms 77996 KB Output is correct
21 Correct 877 ms 88232 KB Output is correct
22 Correct 1056 ms 101996 KB Output is correct
23 Correct 1149 ms 155800 KB Output is correct
24 Correct 125 ms 46016 KB Output is correct
25 Correct 134 ms 47132 KB Output is correct
26 Correct 137 ms 47540 KB Output is correct
27 Correct 633 ms 79272 KB Output is correct
28 Correct 1139 ms 155660 KB Output is correct
29 Correct 37 ms 33360 KB Output is correct
30 Correct 40 ms 33448 KB Output is correct
31 Correct 41 ms 33360 KB Output is correct
32 Correct 40 ms 33360 KB Output is correct
33 Correct 810 ms 95664 KB Output is correct
34 Correct 818 ms 94120 KB Output is correct
35 Correct 814 ms 91336 KB Output is correct
36 Correct 883 ms 87732 KB Output is correct
37 Correct 343 ms 60472 KB Output is correct
38 Correct 363 ms 66484 KB Output is correct
39 Correct 344 ms 60592 KB Output is correct
40 Correct 335 ms 66524 KB Output is correct
41 Correct 344 ms 60520 KB Output is correct
42 Correct 343 ms 66740 KB Output is correct
43 Correct 622 ms 79308 KB Output is correct
44 Correct 1148 ms 155676 KB Output is correct
45 Correct 148 ms 48828 KB Output is correct
46 Correct 189 ms 49156 KB Output is correct
47 Correct 478 ms 65808 KB Output is correct
48 Correct 835 ms 92420 KB Output is correct
49 Correct 155 ms 48732 KB Output is correct
50 Correct 140 ms 48564 KB Output is correct
51 Correct 169 ms 49208 KB Output is correct
52 Correct 177 ms 51632 KB Output is correct
53 Correct 181 ms 51632 KB Output is correct
54 Correct 184 ms 51644 KB Output is correct