oj.uz

Submission #187210

# Submission time Handle Problem Language Result Execution time Memory
187210 2020-01-12T13:37:44 Z MiricaMatei Street Lamps (APIO19_street_lamps) C++14
100 / 100
 3365 ms 188368 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAXN = 300005;
const int MAXQ = 300005;

struct Aib {
  int n;
  vector<int>aib;

  Aib(int _n = 0) {
    n = _n;
    aib.resize(n + 5);
    for (int i = 1; i <= n; ++i)
      aib[i] = 0;
  }

  void rsz(int _n) {
    n = _n;
    aib.resize(n + 5);
    for (int i = 1; i <= n; ++i)
      aib[i] = 0;
  }

  void update(int pos, int val) {
    if (pos < 0)
      return ;
    for (; pos <= n; pos += (pos & -pos))
      aib[pos] += val;
  }

  int query(int pos) {
    int ans = 0;
    for (; pos; pos -= (pos & -pos))
      ans += aib[pos];
    return ans;
  }
}gen;

struct Toggle {
  int t, pos;
} q1[MAXQ];

struct Query {
  int t, a, b;
} q2[MAXQ];

struct Node {
  vector<int>qry;
  Aib a;
} aint[4 * MAXN];

char s[MAXN], qt[10];
int v[MAXN];
int ans[MAXQ];

pair<int, int>bs(int pos, int n) {
  int l = 1, r = pos - 1, last1 = pos;
  while (l <= r) {
    int mid = (l + r) / 2;
    if (gen.query(pos - 1) - gen.query(mid - 1) == pos - mid) {
      last1 = mid;
      r = mid - 1;
    } else {
      l = mid + 1;
    }
  }
  int last2 = pos;
  l = pos + 1, r = n;
  while (l <= r) {
    int mid = (l + r) / 2;
    if (gen.query(mid) - gen.query(pos) == mid - pos) {
      last2 = mid;
      l = mid + 1;
    } else {
      r = mid - 1;
    }
  }
  return {last1, last2};
}

void add(int node, int l, int r, int k) {
  aint[node].qry.push_back(q2[k].b);
  if (l == r)
    return ;
  int mid = (l + r) / 2;
  if (q2[k].a <= mid)
    add(2 * node, l, mid, k);
  else
    add(2 * node + 1, mid + 1, r, k);
}

void build(int node, int l, int r) {
  if ((int)(aint[node].qry.size()) == 0)
    return ;
  sort(aint[node].qry.begin(), aint[node].qry.end());
  aint[node].a.rsz((int)(aint[node].qry.size()));
  if (l == r)
    return ;
  int mid = (l + r) / 2;
  build(2 * node, l, mid);
  build(2 * node + 1, mid + 1, r);
}

void update(int node, int l, int r, int a, int b, int x, int val) {
  if ((int)(aint[node].qry.size()) == 0)
    return ;
  if (a <= l && r <= b) {
    int l1 = 0, r1 = (int)(aint[node].qry.size()) - 1;
    int last1 = -1, last2 = -2;
    while (l1 <= r1) {
      int mid1 = (l1 + r1) / 2;
      if (aint[node].qry[mid1] >= b) {
        last1 = mid1;
        r1 = mid1 - 1;
      } else {
        l1 = mid1 + 1;
      }
    }
    l1 = 0, r1 = (int)(aint[node].qry.size()) - 1;
    while (l1 <= r1) {
      int mid1 = (l1 + r1) / 2;
      if (aint[node].qry[mid1] <= x) {
        last2 = mid1;
        l1 = mid1 + 1;
      } else {
        r1 = mid1 - 1;
      }
    }
    if (last1 != -1 && last2 != -2) {
      aint[node].a.update(last1 + 1, val);
      aint[node].a.update(last2 + 2, -val);
    }
    return ;
  }
  if (l == r)
    return ;
  int mid = (l + r) / 2;
  if (a <= mid)
    update(2 * node, l, mid, a, b, x, val);
  if (b > mid)
    update(2 * node + 1, mid + 1, r, a, b, x, val);
}

int query(int node, int l, int r, int k) {
  if ((int)(aint[node].qry.size()) == 0)
    return 0;
  int l1 = 0, r1 = (int)(aint[node].qry.size()) - 1, last = -1;
  while (l1 <= r1) {
    int mid1 = (l1 + r1) / 2;
    if (aint[node].qry[mid1] <= q2[k].b) {
      last = mid1;
      l1 = mid1 + 1;
    } else {
      r1 = mid1 - 1;
    }
  }
  int ans = aint[node].a.query(last + 1);
  if (l == r)
    return ans;
  int mid = (l + r) / 2;
  if (q2[k].a <= mid)
    ans += query(2 * node, l, mid, k);
  else
    ans += query(2 * node + 1, mid + 1, r, k);
  return ans;
}

int main() {
  //freopen("date.in", "r", stdin);
  //freopen("date.out", "w", stdout);

  int n, q;
  scanf("%d%d ", &n, &q);
  scanf("%s", s + 1);
  int k1 = 0, k2 = 0;
  for (int i = 1; i <= q; ++i) {
    scanf("%s", qt);
    if (qt[0] == 't') {
      k1++;
      scanf("%d ", &q1[k1].pos);
      q1[k1].t = i;
    } else {
      k2++;
      scanf("%d%d ", &q2[k2].a, &q2[k2].b);
      q2[k2].b--;
      q2[k2].t = i;
      add(1, 1, n, k2);
    }
  }

  build(1, 1, n);

  gen.rsz(n);
  for (int i = 1; i <= n; ++i) {
    if (s[i] == '1') {
      gen.update(i, 1);
      v[i] = 1;
    }
  }
  for (int i = 1, j = 1; i <= k1 || j <= k2; ) {
    if (i <= k1 && (j > k2 || q1[i].t < q2[j].t)) {
      int val;
      if (v[q1[i].pos] == 1) {
        val = i + j - 1;
        v[q1[i].pos] = 0;
        gen.update(q1[i].pos, -1);
      } else {
        val = -(i + j - 1);
        v[q1[i].pos] = 1;
        gen.update(q1[i].pos, 1);
      }
      pair<int, int>interval = bs(q1[i].pos, n);
      update(1, 1, n, interval.first, q1[i].pos, interval.second, val);
      i++;
    } else {
      ans[j] = query(1, 1, n, j);
      int x = gen.query(q2[j].b) - gen.query(q2[j].a - 1);
      if (gen.query(q2[j].b) - gen.query(q2[j].a - 1) == q2[j].b - q2[j].a + 1)
        ans[j] += i + j - 1;
      j++;
    }
  }

  for (int i = 1; i <= k2; ++i)
    printf("%d\n", ans[i]);

  return 0;
}

Compilation message

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:219:11: warning: unused variable 'x' [-Wunused-variable]
       int x = gen.query(q2[j].b) - gen.query(q2[j].a - 1);
           ^
street_lamps.cpp:175:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d ", &n, &q);
   ~~~~~^~~~~~~~~~~~~~~~~
street_lamps.cpp:176:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s", s + 1);
   ~~~~~^~~~~~~~~~~~~
street_lamps.cpp:179:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%s", qt);
     ~~~~~^~~~~~~~~~
street_lamps.cpp:182:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d ", &q1[k1].pos);
       ~~~~~^~~~~~~~~~~~~~~~~~~~
street_lamps.cpp:186:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d%d ", &q2[k2].a, &q2[k2].b);
       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 146 ms 103672 KB Output is correct
2 Correct 152 ms 103724 KB Output is correct
3 Correct 148 ms 103800 KB Output is correct
4 Correct 148 ms 103780 KB Output is correct
5 Correct 151 ms 103644 KB Output is correct
6 Correct 171 ms 103752 KB Output is correct
7 Correct 165 ms 103800 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 603 ms 121852 KB Output is correct
2 Correct 733 ms 124336 KB Output is correct
3 Correct 1184 ms 131728 KB Output is correct
4 Correct 2243 ms 156408 KB Output is correct
5 Correct 2360 ms 162000 KB Output is correct
6 Correct 1663 ms 147792 KB Output is correct
7 Correct 3255 ms 185936 KB Output is correct
8 Correct 3274 ms 188368 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 164 ms 103652 KB Output is correct
2 Correct 148 ms 103800 KB Output is correct
3 Correct 150 ms 103856 KB Output is correct
4 Correct 151 ms 103920 KB Output is correct
5 Correct 689 ms 114936 KB Output is correct
6 Correct 1519 ms 140476 KB Output is correct
7 Correct 2269 ms 159512 KB Output is correct
8 Correct 3188 ms 183704 KB Output is correct
9 Correct 720 ms 127328 KB Output is correct
10 Correct 837 ms 129152 KB Output is correct
11 Correct 791 ms 130000 KB Output is correct
12 Correct 3197 ms 181184 KB Output is correct
13 Correct 3365 ms 183980 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 139 ms 103892 KB Output is correct
2 Correct 148 ms 103928 KB Output is correct
3 Correct 148 ms 103816 KB Output is correct
4 Correct 176 ms 103796 KB Output is correct
5 Correct 3155 ms 181588 KB Output is correct
6 Correct 2492 ms 165192 KB Output is correct
7 Correct 1640 ms 146960 KB Output is correct
8 Correct 677 ms 114908 KB Output is correct
9 Correct 599 ms 117220 KB Output is correct
10 Correct 351 ms 109304 KB Output is correct
11 Correct 614 ms 117096 KB Output is correct
12 Correct 345 ms 109524 KB Output is correct
13 Correct 582 ms 117172 KB Output is correct
14 Correct 344 ms 109432 KB Output is correct
15 Correct 3205 ms 181184 KB Output is correct
16 Correct 3192 ms 183640 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 146 ms 103672 KB Output is correct
2 Correct 152 ms 103724 KB Output is correct
3 Correct 148 ms 103800 KB Output is correct
4 Correct 148 ms 103780 KB Output is correct
5 Correct 151 ms 103644 KB Output is correct
6 Correct 171 ms 103752 KB Output is correct
7 Correct 165 ms 103800 KB Output is correct
8 Correct 603 ms 121852 KB Output is correct
9 Correct 733 ms 124336 KB Output is correct
10 Correct 1184 ms 131728 KB Output is correct
11 Correct 2243 ms 156408 KB Output is correct
12 Correct 2360 ms 162000 KB Output is correct
13 Correct 1663 ms 147792 KB Output is correct
14 Correct 3255 ms 185936 KB Output is correct
15 Correct 3274 ms 188368 KB Output is correct
16 Correct 164 ms 103652 KB Output is correct
17 Correct 148 ms 103800 KB Output is correct
18 Correct 150 ms 103856 KB Output is correct
19 Correct 151 ms 103920 KB Output is correct
20 Correct 689 ms 114936 KB Output is correct
21 Correct 1519 ms 140476 KB Output is correct
22 Correct 2269 ms 159512 KB Output is correct
23 Correct 3188 ms 183704 KB Output is correct
24 Correct 720 ms 127328 KB Output is correct
25 Correct 837 ms 129152 KB Output is correct
26 Correct 791 ms 130000 KB Output is correct
27 Correct 3197 ms 181184 KB Output is correct
28 Correct 3365 ms 183980 KB Output is correct
29 Correct 139 ms 103892 KB Output is correct
30 Correct 148 ms 103928 KB Output is correct
31 Correct 148 ms 103816 KB Output is correct
32 Correct 176 ms 103796 KB Output is correct
33 Correct 3155 ms 181588 KB Output is correct
34 Correct 2492 ms 165192 KB Output is correct
35 Correct 1640 ms 146960 KB Output is correct
36 Correct 677 ms 114908 KB Output is correct
37 Correct 599 ms 117220 KB Output is correct
38 Correct 351 ms 109304 KB Output is correct
39 Correct 614 ms 117096 KB Output is correct
40 Correct 345 ms 109524 KB Output is correct
41 Correct 582 ms 117172 KB Output is correct
42 Correct 344 ms 109432 KB Output is correct
43 Correct 3205 ms 181184 KB Output is correct
44 Correct 3192 ms 183640 KB Output is correct
45 Correct 306 ms 112280 KB Output is correct
46 Correct 499 ms 115136 KB Output is correct
47 Correct 1106 ms 130800 KB Output is correct
48 Correct 1952 ms 153352 KB Output is correct
49 Correct 894 ms 132316 KB Output is correct
50 Correct 875 ms 132216 KB Output is correct
51 Correct 886 ms 133456 KB Output is correct
52 Correct 875 ms 139088 KB Output is correct
53 Correct 873 ms 139220 KB Output is correct
54 Correct 868 ms 138964 KB Output is correct