Submission #978982

#	Time	Username	Problem	Language	Result	Execution time	Memory
978982		De3b0o	Street Lamps (APIO19_street_lamps)	C++17	0 / 100	4287 ms	459188 KiB

street_lamps

#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")
#include<bits/stdc++.h>
#define ll long long
#define F first
#define S second
#define in insert
#define pb push_back
#define ppb pop_back()
#define d3 ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define cans cout << ans << "\n";
#define yes cout << "Yes" << "\n";
#define no cout << "No" << "\n";
#define pll pair<ll,ll>
#define lin cout << "\n";
#define sqr 340
#define mod 1000000007
#define mid ((l+r)/2)
#define lc (2*n)
#define rc (2*n+1)

using namespace std;

ll fp(ll x , ll y)
{
    if(y==0)
        return 1;
    ll z = fp(x,y/2);
    if(y&1)
        return z*z%mod*x%mod;
    else
        return z*z%mod;
}

int sqrot(ll x)
{
    int l = 0 , r = INT_MAX;
    while(l<=r)
    {
        if(mid*mid>=x)
            r=mid-1;
        else
            l=mid+1;
    }
    return r+1;
}

ll cel(ll x , ll y)
{
    return x/y + bool(x%y);
}

bool s[400009];
set<pll> seg[2000009];
set<ll> sl , sr;

void se(ll n , ll l , ll r , ll idx , ll val1 , ll val2)
{
    if(l>idx||r<idx)
        return;
    seg[n].in({val1,val2});
    if(l!=r)
    {
        se(lc,l,mid,idx,val1,val2);
        se(rc,mid+1,r,idx,val1,val2);
    }
}

ll sg(ll n , ll l , ll r , ll l1 , ll r1 , ll idx)
{
    if(l>r1||r<l1)
        return 1e10;
    if(l>=l1&&r<=r1)
    {
        auto it = seg[n].lower_bound({idx,0});
        ll x = 1e10;
        if(it!=seg[n].end())
            x=it->S;
        return x;
    }
    return min(sg(lc,l,mid,l1,r1,idx),sg(rc,mid+1,r,l1,r1,idx));
}

int main()
{
    d3
    ll n , q;
    cin >> n >> q;
    string s1;
    cin >> s1;
    for(int i = 0 ; n>i ; i++)
    {
        if(s1[i]=='0')
        {
            sl.in(-i-1);
            sr.in(i+1);
            s[i+1]=0;
        }
        else
            s[i+1]=1;
    }
    for(int i = 1 ; n>=i ; i++)
    {
        if(s[i]==1)
        {
            ll j = i;
            for(;n>=j;j++)
            {
                if(s[j]==0)
                    break;
            }
            se(1,1,n+1,i,j,0);
            i=j;
        }
    }
    for(ll h = 1 ; q>=h ; h++)
    {
        string t;
        cin >> t;
        if(t[0]=='q')
        {
            ll a , b;
            cin >> a >> b;
            ll e = sg(1,1,n+1,1,a,b);
            ll ans = h-e;
            if(ans<0)
                ans=0;
            cans
        }
        else
        {
            ll x;
            cin >> x;
            s[x]=1;
            sl.erase(sl.find(-x));
            sr.erase(sr.find(x));
            ll l1 = x , r1 = x+1;
            auto it = sl.lower_bound(-x);
            if(it==sl.end())
                l1=1;
            else
                l1=-*it+1;
            auto it1 = sr.lower_bound(x);
            if(it1==sr.end())
                r1=n+1;
            else
                r1=*it1-1;
            se(1,1,n+1,l1,r1,h);
        }
    }
}

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