oj.uz

Submission #386791

# Submission time Handle Problem Language Result Execution time Memory
386791 2021-04-07T10:05:26 Z clifter Street Lamps (APIO19_street_lamps) C++14
100 / 100
 1737 ms 60112 KB 
#include <iostream>
#include <algorithm>
#include <set>
#include <vector>
#define ll long long

using namespace std;
struct event{
  int t; int x; int y; ll value;
};
bool cmpt(event a, event b){return a.t<b.t;}
bool cmpx(event a, event b){if(a.x!=b.x) return a.x<b.x; else return a.t<b.t;}

int last[300500],first[300500],toggle[300500];
ll ans[300500];
ll fw1[300500], fw2[300500];
set<int> S;
event EA[300500][4],EB[1005000], EA0[1005000];
int Asize[300500],EA0size;


void cdq(int l, int r, int n){

  int mid = (l+r)/2;
  if(l==r) return;

  cdq(l, mid, n);
  cdq(mid+1, r, n);

  int EBS = 0;

  for(int i=l; i<=mid; i++){

    if(i==0) {
      for(int j=0; j<EA0size; j++){
        if(EA0[j].value!=0) EB[EBS++] = EA0[j];
      }
    }

    else{
      for(int j=0; j<Asize[i]; j++){
        if(EA[i][j].value!=0) EB[EBS++] = EA[i][j];
      }
    }

  }
  for(int i=mid+1; i<=r; i++){
    for(int j=0; j<Asize[i]; j++){
      if(EA[i][j].value==0) EB[EBS++] = EA[i][j];
    }
  }

  sort(EB, EB+EBS, cmpx);

  for(int i=0; i<EBS; i++){

    if(EB[i].t<=mid){

      int x = n+2-EB[i].y;
      while(x < n+2) {
        fw1[x] += EB[i].value*EB[i].t;
        fw2[x] += EB[i].value;
        x += (x & -x);
      }

    }

    if(EB[i].t>mid) {
      
      int x = n+2-EB[i].y;
      while (x > 0) {

        ans[EB[i].t] += fw2[x]*EB[i].t;
        ans[EB[i].t] -= fw1[x];
        x -= (x & -x);

      }
    }
  }

  for(int i=0; i<EBS; i++){

    if(EB[i].t<=mid){

      int x = n+2-EB[i].y;
      while(x < n+2) {
        fw1[x] -= EB[i].value*EB[i].t;
        fw2[x] -= EB[i].value;
        x += (x & -x);
      }

    }

  }

}

int main() {


  cin.sync_with_stdio(false);
  cin.tie(nullptr);
  cout.tie(nullptr);

  int n, m;
  cin>>n>>m;

  string s;
  cin>>s;


  last[n+1] = n+1;
  first[1] = 1;
  for(int i=n+1; i>=2; i--) last[i-1] = (s[i-2]=='1')?last[i]:(i-1);
  for(int i=2; i<=n+1; i++) first[i] = (s[i-2]=='1')?first[i-1]:i;
  S.insert(n+1);
  for(int i=1; i<=n; i++) if(s[i-1]=='0') S.insert(i); 

  for(int i=1; i<=n+1; i++){

    if(last[i]==i){

      event e = {0, first[i], i, 1};
      if(first[i]!=i) EA0[EA0size++] = e;

    }
  }

  for(int i=1; i<=m; i++){

    string v;
    cin>>v;

    if(v=="query"){

      int x, y;
      cin>>x>>y;
      event e = {i, x, y, 0};
      EA[i][Asize[i]++] = e;
      toggle[i] = 1;

    }
    else{

      int a;
      event e1, e2, e3;
      cin>>a;
      if(s[a-1]=='0'){

        s[a-1]='1';

        e1 = {i, a+1, last[a+1], -1};
        e2 = {i, first[a], last[a+1], 1};
        e3 = {i, first[a], a, -1};


        last[first[a]] = last[a+1];
        first[last[a+1]] = first[a];

        auto k = S.find(a);
        S.erase(k);

      }
      else{

        s[a-1] = '0';
        int x1, x2;
        x2 = *S.lower_bound(a+1);
        x1 = first[x2];

        e1 = {i, x1, x2, -1};
        e2 = {i, x1, a, 1};
        e3 = {i, a+1, x2, 1};


        last[x1] = a;
        last[a+1] = x2;
        first[a] = x1;
        first[x2] = a+1;
        S.insert(a);

      }

      if(e1.x!=e1.y) EA[i][Asize[i]++] = e1;
      if(e2.x!=e2.y) EA[i][Asize[i]++] = e2;
      if(e3.x!=e3.y) EA[i][Asize[i]++] = e3;
    
    }
  }

  cdq(0, m, n);
  for(int i=1; i<=m; i++){

    if(toggle[i]==1) cout<<ans[i]<<"\n";

  }
  
  
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 2 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 723 ms 39524 KB Output is correct
2 Correct 742 ms 39640 KB Output is correct
3 Correct 785 ms 39916 KB Output is correct
4 Correct 1392 ms 57344 KB Output is correct
5 Correct 1335 ms 56208 KB Output is correct
6 Correct 1478 ms 59648 KB Output is correct
7 Correct 551 ms 54144 KB Output is correct
8 Correct 487 ms 41600 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 620 KB Output is correct
2 Correct 3 ms 620 KB Output is correct
3 Correct 3 ms 620 KB Output is correct
4 Correct 2 ms 492 KB Output is correct
5 Correct 1392 ms 60112 KB Output is correct
6 Correct 1556 ms 59520 KB Output is correct
7 Correct 1372 ms 55552 KB Output is correct
8 Correct 480 ms 41728 KB Output is correct
9 Correct 260 ms 30728 KB Output is correct
10 Correct 297 ms 33772 KB Output is correct
11 Correct 300 ms 33516 KB Output is correct
12 Correct 551 ms 54272 KB Output is correct
13 Correct 479 ms 41728 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 620 KB Output is correct
2 Correct 3 ms 620 KB Output is correct
3 Correct 3 ms 620 KB Output is correct
4 Correct 3 ms 620 KB Output is correct
5 Correct 923 ms 55552 KB Output is correct
6 Correct 1222 ms 58496 KB Output is correct
7 Correct 1489 ms 59264 KB Output is correct
8 Correct 1737 ms 54880 KB Output is correct
9 Correct 854 ms 39916 KB Output is correct
10 Correct 909 ms 37228 KB Output is correct
11 Correct 850 ms 39828 KB Output is correct
12 Correct 890 ms 36984 KB Output is correct
13 Correct 847 ms 39916 KB Output is correct
14 Correct 892 ms 36972 KB Output is correct
15 Correct 554 ms 54144 KB Output is correct
16 Correct 489 ms 41728 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 2 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 723 ms 39524 KB Output is correct
9 Correct 742 ms 39640 KB Output is correct
10 Correct 785 ms 39916 KB Output is correct
11 Correct 1392 ms 57344 KB Output is correct
12 Correct 1335 ms 56208 KB Output is correct
13 Correct 1478 ms 59648 KB Output is correct
14 Correct 551 ms 54144 KB Output is correct
15 Correct 487 ms 41600 KB Output is correct
16 Correct 3 ms 620 KB Output is correct
17 Correct 3 ms 620 KB Output is correct
18 Correct 3 ms 620 KB Output is correct
19 Correct 2 ms 492 KB Output is correct
20 Correct 1392 ms 60112 KB Output is correct
21 Correct 1556 ms 59520 KB Output is correct
22 Correct 1372 ms 55552 KB Output is correct
23 Correct 480 ms 41728 KB Output is correct
24 Correct 260 ms 30728 KB Output is correct
25 Correct 297 ms 33772 KB Output is correct
26 Correct 300 ms 33516 KB Output is correct
27 Correct 551 ms 54272 KB Output is correct
28 Correct 479 ms 41728 KB Output is correct
29 Correct 2 ms 620 KB Output is correct
30 Correct 3 ms 620 KB Output is correct
31 Correct 3 ms 620 KB Output is correct
32 Correct 3 ms 620 KB Output is correct
33 Correct 923 ms 55552 KB Output is correct
34 Correct 1222 ms 58496 KB Output is correct
35 Correct 1489 ms 59264 KB Output is correct
36 Correct 1737 ms 54880 KB Output is correct
37 Correct 854 ms 39916 KB Output is correct
38 Correct 909 ms 37228 KB Output is correct
39 Correct 850 ms 39828 KB Output is correct
40 Correct 890 ms 36984 KB Output is correct
41 Correct 847 ms 39916 KB Output is correct
42 Correct 892 ms 36972 KB Output is correct
43 Correct 554 ms 54144 KB Output is correct
44 Correct 489 ms 41728 KB Output is correct
45 Correct 427 ms 26188 KB Output is correct
46 Correct 462 ms 26160 KB Output is correct
47 Correct 690 ms 32236 KB Output is correct
48 Correct 1577 ms 56848 KB Output is correct
49 Correct 371 ms 37484 KB Output is correct
50 Correct 345 ms 37484 KB Output is correct
51 Correct 457 ms 37484 KB Output is correct
52 Correct 354 ms 37484 KB Output is correct
53 Correct 350 ms 37484 KB Output is correct
54 Correct 347 ms 37476 KB Output is correct