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Submission #956936

# Submission time Handle Problem Language Result Execution time Memory
956936 2024-04-02T17:31:43 Z HoriaHaivas Street Lamps (APIO19_street_lamps) C++14
100 / 100
 2807 ms 154160 KB 
/*
    "care a facut teste cu Lattice reduction attack e ciudat"
    "linistiti va putin"
    - 2023 -
*/
#include<bits/stdc++.h>
#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "
#pragma GCC optimize("Ofast")

using namespace std;

struct event
{
    int x;
    int y;
    int moment;
};

int mom,n;
bool state[300005];
bool initialstate[300005];
bool type[300005];
int l[300005];
int r[300005];
int pos[300005];
int altaib[300005];
vector<event> updates;
vector<int> vals[300005];
vector<int> aib[300005];

void altupdate(int index, int delta)
{
    while (index<=n)
    {
        altaib[index]+=delta;
        index+=index&(-index);
    }
}

int altquery(int index)
{
    int ans;
    ans=0;
    while (index>0)
    {
        ans+=altaib[index];
        index-=index&(-index);
    }
    return ans;
}

void setupdate(int x, int y)
{
    for (; x<=n; x+=x&(-x))
    {
        vals[x].push_back(y);
    }
}

void updatinho(int apos)
{
    int st,dr,pas;
    if (state[apos]==1)
    {
        st=apos;
        pas=(1<<18);
        while (pas)
        {
            if (st-pas>0 && altquery(apos)-altquery(st-pas-1)==apos-(st-pas)+1)
                st-=pas;
            pas=pas/2;
        }
        dr=apos;
        pas=(1<<18);
        while (pas)
        {
            if (dr+pas<=n && altquery(dr+pas)-altquery(apos-1)==dr+pas-apos+1)
                dr+=pas;
            pas=pas/2;
        }
    }
    else
    {
        st=apos;
        pas=(1<<18);
        while (pas)
        {
            if (st-pas>0 && altquery(apos)-altquery(st-pas-1)==apos-(st-pas))
                st-=pas;
            pas=pas/2;
        }
        dr=apos;
        pas=(1<<18);
        while (pas)
        {
            if (dr+pas<=n && altquery(dr+pas)-altquery(apos-1)==dr+pas-apos)
                dr+=pas;
            pas=pas/2;
        }
    }
    setupdate(st,apos);
    updates.push_back({st,apos,mom});
    setupdate(apos+1,apos);
    updates.push_back({apos+1,apos,mom});
    setupdate(st,dr+1);
    updates.push_back({st,dr+1,mom});
    setupdate(apos+1,dr+1);
    updates.push_back({apos+1,dr+1,mom});
}

int indice(int x, int y)
{
    return upper_bound(vals[x].begin(),vals[x].end(),y)-vals[x].begin()-1;
}

void update(int x, int y, int delta)
{
    int newy;
    for (; x<=n; x+=x&(-x))
    {
        newy=indice(x,y);
        for (; newy<=aib[x].size(); newy+=newy&(-newy))
        {
            aib[x][newy]+=delta;
        }
    }
}

int query(int x, int y)
{
    int ans,newy;
    ans=0;
    for (; x>0; x-=x&(-x))
    {
        newy=indice(x,y);
        for (; newy>0; newy-=newy&(-newy))
        {
            ans+=aib[x][newy];
        }
    }
    return ans;
}

signed main()
{
    ifstream fin("secvp.in");
    ofstream fout("secvp.out");
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    long long q,i,j,cnt;
    char ch;
    string s;
    cin >> n >> q;
    for (i=1; i<=n; i++)
    {
        cin >> ch;
        if (ch=='0')
            state[i]=0;
        else
            state[i]=1;
        if (state[i]==1)
            altupdate(i,1);
        initialstate[i]=state[i];
    }
    for (i=1; i<=q; i++)
    {
        cin >> s;
        if (s=="query")
            type[i]=1;
        else
            type[i]=0;
        if (type[i]==1)
        {
            cin >> l[i] >> r[i];
        }
        else
        {
            cin >> pos[i];
            mom=i;
            updatinho(pos[i]);
            if (state[pos[i]]==1)
                altupdate(pos[i],-1);
            else
                altupdate(pos[i],1);
            state[pos[i]]=1-state[pos[i]];
        }
    }
    for (i=1; i<=n+1; i++)
    {
        altaib[i]=0;
        vals[i].push_back(0);
        sort(vals[i].begin(),vals[i].end());
        aib[i].resize(vals[i].size());
        state[i]=initialstate[i];
    }
    for (i=1;i<=n;i++)
    {
         if (state[i]==1)
            altupdate(i,1);
    }
    cnt=0;
    for (i=1; i<=q; i++)
    {
        if (type[i]==1)
        {
            if (altquery(r[i]-1)-altquery(l[i]-1)==(r[i]-l[i]))
                cout << i+query(l[i],r[i]-1) << "\n";
            else
                cout << query(l[i],r[i]-1) << "\n";
        }
        else
        {
            if (state[pos[i]]==1)
            {
                update(updates[cnt].x,updates[cnt].y,updates[cnt].moment);
                cnt++;
                update(updates[cnt].x,updates[cnt].y,-updates[cnt].moment);
                cnt++;
                update(updates[cnt].x,updates[cnt].y,-updates[cnt].moment);
                cnt++;
                update(updates[cnt].x,updates[cnt].y,updates[cnt].moment);
                cnt++;
                altupdate(pos[i],-1);
            }
            else
            {
                update(updates[cnt].x,updates[cnt].y,-updates[cnt].moment);
                cnt++;
                update(updates[cnt].x,updates[cnt].y,updates[cnt].moment);
                cnt++;
                update(updates[cnt].x,updates[cnt].y,updates[cnt].moment);
                cnt++;
                update(updates[cnt].x,updates[cnt].y,-updates[cnt].moment);
                cnt++;
                altupdate(pos[i],1);
            }
            state[pos[i]]=1-state[pos[i]];
        }
    }
}

Compilation message

street_lamps.cpp: In function 'void update(int, int, int)':
street_lamps.cpp:123:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  123 |         for (; newy<=aib[x].size(); newy+=newy&(-newy))
      |                ~~~~^~~~~~~~~~~~~~~
street_lamps.cpp: In function 'int main()':
street_lamps.cpp:152:19: warning: unused variable 'j' [-Wunused-variable]
  152 |     long long q,i,j,cnt;
      |                   ^

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 19032 KB Output is correct
2 Correct 5 ms 19096 KB Output is correct
3 Correct 5 ms 19036 KB Output is correct
4 Correct 4 ms 19140 KB Output is correct
5 Correct 4 ms 19036 KB Output is correct
6 Correct 4 ms 19036 KB Output is correct
7 Correct 5 ms 19036 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 495 ms 50948 KB Output is correct
2 Correct 668 ms 54760 KB Output is correct
3 Correct 1036 ms 67272 KB Output is correct
4 Correct 1617 ms 101756 KB Output is correct
5 Correct 1296 ms 88752 KB Output is correct
6 Correct 1757 ms 116060 KB Output is correct
7 Correct 181 ms 45396 KB Output is correct
8 Correct 184 ms 46628 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 19292 KB Output is correct
2 Correct 6 ms 19108 KB Output is correct
3 Correct 6 ms 19292 KB Output is correct
4 Correct 5 ms 19060 KB Output is correct
5 Correct 2776 ms 152332 KB Output is correct
6 Correct 2037 ms 123256 KB Output is correct
7 Correct 1240 ms 87780 KB Output is correct
8 Correct 184 ms 46672 KB Output is correct
9 Correct 66 ms 22864 KB Output is correct
10 Correct 73 ms 23124 KB Output is correct
11 Correct 72 ms 23376 KB Output is correct
12 Correct 172 ms 45676 KB Output is correct
13 Correct 176 ms 46676 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 19036 KB Output is correct
2 Correct 5 ms 19112 KB Output is correct
3 Correct 7 ms 19288 KB Output is correct
4 Correct 6 ms 19292 KB Output is correct
5 Correct 242 ms 46636 KB Output is correct
6 Correct 974 ms 78528 KB Output is correct
7 Correct 1717 ms 115692 KB Output is correct
8 Correct 2807 ms 154160 KB Output is correct
9 Correct 911 ms 78216 KB Output is correct
10 Correct 840 ms 77284 KB Output is correct
11 Correct 918 ms 76460 KB Output is correct
12 Correct 859 ms 76016 KB Output is correct
13 Correct 929 ms 74760 KB Output is correct
14 Correct 888 ms 75368 KB Output is correct
15 Correct 175 ms 45204 KB Output is correct
16 Correct 187 ms 46804 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 19032 KB Output is correct
2 Correct 5 ms 19096 KB Output is correct
3 Correct 5 ms 19036 KB Output is correct
4 Correct 4 ms 19140 KB Output is correct
5 Correct 4 ms 19036 KB Output is correct
6 Correct 4 ms 19036 KB Output is correct
7 Correct 5 ms 19036 KB Output is correct
8 Correct 495 ms 50948 KB Output is correct
9 Correct 668 ms 54760 KB Output is correct
10 Correct 1036 ms 67272 KB Output is correct
11 Correct 1617 ms 101756 KB Output is correct
12 Correct 1296 ms 88752 KB Output is correct
13 Correct 1757 ms 116060 KB Output is correct
14 Correct 181 ms 45396 KB Output is correct
15 Correct 184 ms 46628 KB Output is correct
16 Correct 8 ms 19292 KB Output is correct
17 Correct 6 ms 19108 KB Output is correct
18 Correct 6 ms 19292 KB Output is correct
19 Correct 5 ms 19060 KB Output is correct
20 Correct 2776 ms 152332 KB Output is correct
21 Correct 2037 ms 123256 KB Output is correct
22 Correct 1240 ms 87780 KB Output is correct
23 Correct 184 ms 46672 KB Output is correct
24 Correct 66 ms 22864 KB Output is correct
25 Correct 73 ms 23124 KB Output is correct
26 Correct 72 ms 23376 KB Output is correct
27 Correct 172 ms 45676 KB Output is correct
28 Correct 176 ms 46676 KB Output is correct
29 Correct 5 ms 19036 KB Output is correct
30 Correct 5 ms 19112 KB Output is correct
31 Correct 7 ms 19288 KB Output is correct
32 Correct 6 ms 19292 KB Output is correct
33 Correct 242 ms 46636 KB Output is correct
34 Correct 974 ms 78528 KB Output is correct
35 Correct 1717 ms 115692 KB Output is correct
36 Correct 2807 ms 154160 KB Output is correct
37 Correct 911 ms 78216 KB Output is correct
38 Correct 840 ms 77284 KB Output is correct
39 Correct 918 ms 76460 KB Output is correct
40 Correct 859 ms 76016 KB Output is correct
41 Correct 929 ms 74760 KB Output is correct
42 Correct 888 ms 75368 KB Output is correct
43 Correct 175 ms 45204 KB Output is correct
44 Correct 187 ms 46804 KB Output is correct
45 Correct 119 ms 35060 KB Output is correct
46 Correct 285 ms 39360 KB Output is correct
47 Correct 810 ms 63480 KB Output is correct
48 Correct 1534 ms 102308 KB Output is correct
49 Correct 71 ms 23632 KB Output is correct
50 Correct 73 ms 23592 KB Output is correct
51 Correct 77 ms 23580 KB Output is correct
52 Correct 71 ms 23904 KB Output is correct
53 Correct 71 ms 23892 KB Output is correct
54 Correct 72 ms 23888 KB Output is correct