Submission #157493

#	Time	Username	Problem	Language	Result	Execution time	Memory
157493		combi1k1	Street Lamps (APIO19_street_lamps)	C++14	20 / 100	1993 ms	524292 KiB

street_lamps

#include<bits/stdc++.h>

using namespace std;

#define X       first
#define Y       second
#define pb      emplace_back
#define mt      make_tuple
#define sz(x)   x.size()
#define all(x)  x.begin(),x.end()
#define ops     tuple<int,int,int>

const int   N   = 3e5 + 1;

typedef pair<int,int>   ii;

namespace  BIT  {
    vector<int> val[N];
    vector<int> bit[N];

    void ini() {
        for(int i = 1 ; i < N ; ++i)    {
            sort(all(val[i]));
            val[i].resize(unique(all(val[i])) - val[i].begin());
            bit[i].resize(sz(val[i]) + 5);
        }
    }
    void add(int x,int y)   {
        for(; x < N ; x += x & -x)
            val[x].push_back(y);
    }
    void upd(int x,int y,int v) {   //v < 0 -> turn on, v > 0 -> turn off
        for(; x < N ; x += x & -x)  {
            int p = lower_bound(all(val[x]),y) - val[x].begin() + 1;
            for(; p > 0 ; p -= p & -p)
                bit[x][p] += v;
        }
    }
    int get(int x,int y)    {
        int ans = 0;
        for(; x > 0 ; x -= x & -x)  {
            int p = lower_bound(all(val[x]),y) - val[x].begin() + 1;
            int K = sz(bit[x]);
            for(; p < K ; p += p & -p)
                ans += bit[x][p];
        }
        return  ans;
    }
};

bool on[N];
set<ii> S;

vector<ops> Q[N];
int l[N];
int r[N];

int main()  {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int n;  cin >> n;
    int q;  cin >> q;   ++q;

    S.insert({-1,-1});

    for(int i = 1 ; i <= n ; ++i)   {
        char c; cin >> c;
        if (c == '1')   {
            ii  it = (*--S.end());
            if (it.Y == i - 1)
                S.erase(it);
            else    it.X = i;
            S.insert({it.X,i});
            on[i] = 1;
        }
    }
    S.insert({n + 2,n + 2});

    for(ii  e : S)  if (1 <= e.X && e.Y <= n)
        Q[1].pb(1,e.X,e.Y);

    string t;
    for(int i = 2 ; i <= q ; ++i)   {
        int x, y;   cin >> t >> x;
        if (t == "query")   {
            cin >> y;
            l[i] = x;
            r[i] = y - 1;
            continue;
        }
        if (on[x])  {
            ii  it = (*--S.upper_bound({x,x}));
            if (it.X < x)   S.insert({it.X,x - 1}), Q[i].pb(1,it.X,x - 1);
            if (it.Y > x)   S.insert({x + 1,it.Y}), Q[i].pb(1,x + 1,it.Y);
            S.erase(it);    Q[i].pb(0,it.X,it.Y);
        }
        if(!on[x])  {
            auto L = S.upper_bound({x,x});
            auto R = L--;
            int l = x;
            int r = x;
            if ((*R).X == x + 1)    {
                r = (*R).Y;
                S.erase(R);
                Q[i].pb(0,x + 1,r);
            }
            if ((*L).Y == x - 1)    {
                l = (*L).X;
                S.erase(L);
                Q[i].pb(0,l,x - 1);
            }
            S.insert({l,r});
            Q[i].pb(1,l,r);
        }
        on[x] ^= 1;
    }

    for(int i = 1 ; i <= q ; ++i)
    for(ops _ : Q[i])   {
        int v, x, y;
        tie(v, x, y) = _;
        BIT::add(x,y);
    }

    BIT::ini(); Q[1].pb(1,N,0);

    for(int i = 1 ; i <= q ; ++i)   {
        if (Q[i].empty())   {
            int ans = BIT::get(l[i],r[i]);
            if (ans < 0)
                ans += i;
            cout << ans << "\n";
        }
        for(ops _ : Q[i])   {
            int v, x, y;
            tie(v, x, y) = _;
            if (v)  BIT::upd(x,y,-i);
            else    BIT::upd(x,y, i);
        }
    }
}
/*
5 7
11011
query 1 2
query 1 2
query 1 6
query 3 4
toggle 3
query 3 4
query 1 6
*/

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 20 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20