oj.uz

Submission #333397

# Submission time Handle Problem Language Result Execution time Memory
333397 2020-12-05T20:06:15 Z NaimSS Street Lamps (APIO19_street_lamps) C++14
100 / 100
 1682 ms 84612 KB 
#include <bits/stdc++.h>
#define ld long double
#define endl "\n"
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define pb push_back
#define mp(a,b) make_pair(a,b)
#define ms(v,x) memset(v,x,sizeof(v))
#define all(v) v.begin(),v.end()
#define ff first
#define ss second
#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define per(i, a, b) for(int i = b-1; i>=a ; i--)
#define trav(a, x) for(auto& a : x)
#define allin(a , x) for(auto a : x)
#define Unique(v) sort(all(v));v.erase(unique(all(v)),v.end());
#define sz(v) ((int)v.size())
#define int long long  
using namespace std;
typedef vector<int> vi;
#define y1 abacaba
#define left oooooopss
#define db(x) cerr << #x <<" == "<<x << endl;
#define db2(x,y) cerr<<#x <<" == "<<x<<", "<<#y<<" == "<<y<<endl;
#define db3(x,y,z) cerr << #x<<" == "<<x<<", "<<#y<<" == "<<y<<", "<<#z<<" == "<<z<<endl; g(...) 0
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
inline ll mod(ll n, ll m ){ ll ret = n%m; if(ret < 0) ret += m; return ret; }
ll gcd(ll a, ll b){return (b == 0LL ? a : gcd(b, a%b));}
ll exp(ll b,ll e,ll m){
  b%=m;
  ll ans = 1;
  for (; e; b = b * b % m, e /= 2)
    if (e & 1) ans = ans * b % m;
  return ans;
}

template<class T, int SZ> struct OffBIT2D { 
  bool mode = 0; // mode = 1 -> initialized
  vector<pii> todo; // locations of updates to process
  int cnt[SZ], st[SZ];
  vi val; vector<T> bit; // store all BITs in single vector
  void init() { assert(!mode); mode = 1;
    int lst[SZ]; 
    rep(i,0,SZ) lst[i] = cnt[i] = 0;
    sort(all(todo),[](const pii& a, const pii& b) { 
      return a.ss < b.ss; });
    trav(t,todo) for (int x = t.ff; x < SZ; x += x&-x) {
          if (lst[x] != t.ss) lst[x] = t.ss, cnt[x] ++;
    }

    int sum = 0; rep(i,0,SZ) lst[i] = 0, st[i] = (sum += cnt[i]);
    val.resize(sum); bit.resize(sum); reverse(all(todo));
    trav(t,todo) for (int x = t.ff; x < SZ; x += x&-x) 
      if (lst[x] != t.ss) lst[x] = t.ss, val[--st[x]] = t.ss;
  }
  int rank(int y, int l, int r) {
    return upper_bound(begin(val)+l,begin(val)+r,y)-begin(val)-l; }
  void UPD(int x, int y, T t) {
    for (y = rank(y,st[x],st[x]+cnt[x]); y <= cnt[x]; y += y&-y) 
      bit[st[x]+y-1] += t; }
  void upd(int x, int y, T t) { 
    if (!mode) todo.pb({x,y});
    else for (;x<SZ;x+=x&-x) UPD(x,y,t); }
  int QUERY(int x, int y) { T res = 0;
    for (y = rank(y,st[x],st[x]+cnt[x]); y; y -= y&-y) res += bit[st[x]+y-1];
    return res; }
  T query(int x, int y) { assert(mode);
    T res = 0; for (;x;x-=x&-x) res += QUERY(x,y);
    return res; }
  T query(int xl, int xr, int yl, int yr) { 
    return query(xr,yr)-query(xl-1,yr)
      -query(xr,yl-1)+query(xl-1,yl-1); }
};


struct event{
  int l,r,mx,v;
};


OffBIT2D<ll,300100> BIT;

vector<event> ev;

int n,q;
void add_event(int l,int r,int mx,ll v,int A=0){
  BIT.upd(l,mx,v);
  if(r!=n)BIT.upd(r+1,mx,-v);
  if(!A)ev.pb({l,r,mx,v});
}

ll ask(int a,int b,int A=0){
  ll res=0;
  if(!A)ev.pb({a,b,-1,-1});
  else{
    res = BIT.query(1,a,b,n);
  }
  return res;
}

const int N = 300100;
char s[N];

int fim[N];

int last[N];
string Q[N];
int a[N],b[N];


int32_t main(){
  fastio;
  cin >> n >> q;
  for(int i=1;i<=n;i++){
    cin >> s[i];
  }
  s[0]='0';
  set<pii> S;
  s[n+1]='0';
  for(int i=n;i>=0;i--){
    last[i] = 0;
    if(s[i] =='1'){
      if(s[i+1]=='1')fim[i] = fim[i+1];
      else{
        fim[i] = i;
      }
      continue;
    }
    if(s[i+1]=='1'){
      S.insert(pii(i+1,fim[i+1]));
    }
  }
  
  for(int ii=1;ii<=q;ii++){
    cin >> Q[ii];
    if(Q[ii][0]=='t'){
      cin >> a[ii];
      int pos = a[ii];
      if(s[pos] == '0'){
        s[pos] ='1';
        int l = pos,r = pos;
        if(s[pos-1]=='1'){
          auto it = S.lower_bound(pii(pos,-1));
          assert(it!=S.begin());
          it--;
          l = it->ff;
          add_event(it->ff,it->ss,it->ss,ii-last[it->ff]);
          last[it->ff] = ii;
          S.erase(it);
        }
        if(s[pos+1]=='1'){
          auto it = S.lower_bound(pii(pos,-1));
          assert(it!=S.end());
          r=it->ss;
          add_event(it->ff,it->ss,it->ss,ii-last[it->ff]);
          last[it->ff] = ii;
          S.erase(it);
        }
        S.insert(pii(l,r));
        last[l] = ii;
        
       // db2(l,r);
      }else{

        s[pos]='0';
        auto it = S.lower_bound(pii(pos+1,-1));
        assert(it!=S.begin());
        it--;
        int t = last[it->ff];
        int l = it->ff,r = it->ss;
        
        if(pos!=r)
          last[pos+1] = t;
        
        add_event(it->ff,pos,it->ss,ii-last[it->ff]);
        
        S.erase(it);
        last[l] = ii;
        if(pos!=l)S.insert(pii(l,pos-1));
        if(pos!=r)S.insert(pii(pos+1,r));
      }

    }else{
      cin >> a[ii] >> b[ii];
      b[ii]--;
      if(s[a[ii]] == '0'){
        ask(a[ii],b[ii]);
        continue;
      }
      auto it = S.lower_bound(pii(a[ii]+1,-1));
      assert(it!=S.begin());
      it--;
      add_event(it->ff,it->ss,it->ss,ii-last[it->ff]);
      last[it->ff] = ii;
      ask(a[ii],b[ii]);
    }
  }
  BIT.init();

  for(auto it : ev){
    //cout << it.l<<" "<<it.r<<" "<<it.mx<<" "<<it.v << endl;
    if(it.mx != -1){
      add_event(it.l,it.r,it.mx,it.v,1);
    }else{
      cout << ask(it.l,it.r,1) << endl;
    }
  }

  // math -> gcd it all
  // Did u check N=1? Did you switch N,M?
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 16896 KB Output is correct
2 Correct 11 ms 16876 KB Output is correct
3 Correct 11 ms 16876 KB Output is correct
4 Correct 11 ms 16888 KB Output is correct
5 Correct 12 ms 16876 KB Output is correct
6 Correct 11 ms 16768 KB Output is correct
7 Correct 11 ms 16876 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 434 ms 41368 KB Output is correct
2 Correct 549 ms 45080 KB Output is correct
3 Correct 817 ms 47048 KB Output is correct
4 Correct 1310 ms 76516 KB Output is correct
5 Correct 1682 ms 84612 KB Output is correct
6 Correct 1315 ms 77552 KB Output is correct
7 Correct 187 ms 40404 KB Output is correct
8 Correct 310 ms 69432 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 17132 KB Output is correct
2 Correct 13 ms 17132 KB Output is correct
3 Correct 14 ms 17132 KB Output is correct
4 Correct 12 ms 17004 KB Output is correct
5 Correct 1405 ms 80644 KB Output is correct
6 Correct 1604 ms 83272 KB Output is correct
7 Correct 1636 ms 78596 KB Output is correct
8 Correct 303 ms 64056 KB Output is correct
9 Correct 309 ms 50092 KB Output is correct
10 Correct 327 ms 50808 KB Output is correct
11 Correct 325 ms 53804 KB Output is correct
12 Correct 177 ms 34384 KB Output is correct
13 Correct 298 ms 64056 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 17004 KB Output is correct
2 Correct 12 ms 17004 KB Output is correct
3 Correct 12 ms 17132 KB Output is correct
4 Correct 14 ms 17260 KB Output is correct
5 Correct 997 ms 63224 KB Output is correct
6 Correct 1184 ms 67268 KB Output is correct
7 Correct 1318 ms 72160 KB Output is correct
8 Correct 1463 ms 76412 KB Output is correct
9 Correct 578 ms 39320 KB Output is correct
10 Correct 491 ms 41092 KB Output is correct
11 Correct 570 ms 42264 KB Output is correct
12 Correct 494 ms 41240 KB Output is correct
13 Correct 575 ms 42264 KB Output is correct
14 Correct 497 ms 41284 KB Output is correct
15 Correct 180 ms 40252 KB Output is correct
16 Correct 302 ms 69592 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 16896 KB Output is correct
2 Correct 11 ms 16876 KB Output is correct
3 Correct 11 ms 16876 KB Output is correct
4 Correct 11 ms 16888 KB Output is correct
5 Correct 12 ms 16876 KB Output is correct
6 Correct 11 ms 16768 KB Output is correct
7 Correct 11 ms 16876 KB Output is correct
8 Correct 434 ms 41368 KB Output is correct
9 Correct 549 ms 45080 KB Output is correct
10 Correct 817 ms 47048 KB Output is correct
11 Correct 1310 ms 76516 KB Output is correct
12 Correct 1682 ms 84612 KB Output is correct
13 Correct 1315 ms 77552 KB Output is correct
14 Correct 187 ms 40404 KB Output is correct
15 Correct 310 ms 69432 KB Output is correct
16 Correct 13 ms 17132 KB Output is correct
17 Correct 13 ms 17132 KB Output is correct
18 Correct 14 ms 17132 KB Output is correct
19 Correct 12 ms 17004 KB Output is correct
20 Correct 1405 ms 80644 KB Output is correct
21 Correct 1604 ms 83272 KB Output is correct
22 Correct 1636 ms 78596 KB Output is correct
23 Correct 303 ms 64056 KB Output is correct
24 Correct 309 ms 50092 KB Output is correct
25 Correct 327 ms 50808 KB Output is correct
26 Correct 325 ms 53804 KB Output is correct
27 Correct 177 ms 34384 KB Output is correct
28 Correct 298 ms 64056 KB Output is correct
29 Correct 12 ms 17004 KB Output is correct
30 Correct 12 ms 17004 KB Output is correct
31 Correct 12 ms 17132 KB Output is correct
32 Correct 14 ms 17260 KB Output is correct
33 Correct 997 ms 63224 KB Output is correct
34 Correct 1184 ms 67268 KB Output is correct
35 Correct 1318 ms 72160 KB Output is correct
36 Correct 1463 ms 76412 KB Output is correct
37 Correct 578 ms 39320 KB Output is correct
38 Correct 491 ms 41092 KB Output is correct
39 Correct 570 ms 42264 KB Output is correct
40 Correct 494 ms 41240 KB Output is correct
41 Correct 575 ms 42264 KB Output is correct
42 Correct 497 ms 41284 KB Output is correct
43 Correct 180 ms 40252 KB Output is correct
44 Correct 302 ms 69592 KB Output is correct
45 Correct 200 ms 34736 KB Output is correct
46 Correct 296 ms 35192 KB Output is correct
47 Correct 789 ms 50236 KB Output is correct
48 Correct 1288 ms 75716 KB Output is correct
49 Correct 245 ms 47148 KB Output is correct
50 Correct 222 ms 45688 KB Output is correct
51 Correct 293 ms 54828 KB Output is correct
52 Correct 287 ms 53556 KB Output is correct
53 Correct 219 ms 45240 KB Output is correct
54 Correct 321 ms 56120 KB Output is correct