oj.uz

Submission #306096

# Submission time Handle Problem Language Result Execution time Memory
306096 2020-09-24T13:53:56 Z Vimmer Comparing Plants (IOI20_plants) C++14
5 / 100
 235 ms 43512 KB 
#include <bits/stdc++.h>
#include "plants.h"
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

#define N 200005
#define PB push_back
#define sz(x) int(x.size())
#define P 31
#define F first
#define M ll(1e9 + 7)
#define S second
#define all(x) x.begin(), x.end()
#define endl '\n'

//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("fast-math")
//#pragma GCC optimize("no-stack-protector")

using namespace std;
//using namespace __gnu_pbds;

typedef long long ll;

//typedef tree<int, null_type, less_equal <int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

ll mlt(ll a, ll b) {return (a * b) % M;}
ll sm(ll a, ll b) {return (a + b) % M;}

int id, K, h[N];

array <int, 3> t[N * 4];

int psh[N * 4], psp[N * 4], n;

vector <pair <int, int> > gt[N];

vector <int> a;

set <int> g[N];

void updater(int v, int ps, int l, int r)
{
    if (psp[v] == -1) psp[v] = ps;
    else
    {
        int len1, len2;

        int psr = t[v][2];

        if (psr < psp[v]) len1 = n - psp[v] + psr;
          else psr - psp[v];

        if (psr < ps) len2 = n - ps + psr;
          else psr - ps;

        if (len2 > len1) psp[v] = ps;
    }
}
void Push(int v, int tl, int tr)
{
    t[v][0] += psh[v];

    t[v][0] = max(t[v][0], 0);

    if (tl != tr)
    {
        psh[v + v] += psh[v];

        psh[v + v + 1] += psh[v];
    }

    psh[v] = 0;

    if (psp[v] == -1) return;

    if (tl != tr)
    {
        int md = (tl + tr) >> 1;

        updater(v + v, psp[v], tl, md);

        updater(v + v + 1, psp[v], md + 1, tr);
    }

    int psr = t[v][2];

    t[v][1] = max(t[v][1], (psr < psp[v] ? n - psp[v] + psr : psr - psp[v]));

    psp[v] = -1;
}


void com(int v)
{
    if (t[v + v][0] == t[v + v + 1][0])
        {
            if (t[v + v][1] > t[v + v + 1][1]) t[v] = t[v + v];
              else t[v] = t[v + v + 1];
        }
        else
        {
            if (t[v + v][0] < t[v + v + 1][0]) t[v] = t[v + v];
             else t[v] = t[v + v + 1];
        }
}

void bld(int v, int tl, int tr)
{
    psp[v] = -1;

    if (tl == tr) t[v] = {a[tl], 0, tl};
    else
    {
        int md = (tl + tr) >> 1;

        bld(v + v, tl, md);

        bld(v + v + 1, md + 1, tr);

        com(v);
    }
}

void upd(int v, int tl, int tr, int ps)
{
    Push(v, tl, tr);

    if (tr < ps || ps < tl) return;

    if (tl == tr) t[v] = {int(1e9), 0, tl};
      else
      {
          int md = (tl + tr) >> 1;

          upd(v + v, tl, md, ps);

          upd(v + v + 1, md + 1, tr, ps);

          com(v);
      }
}

void upd(int v, int tl, int tr, int l, int r)
{
    Push(v, tl, tr);

    if (tr < l || r < tl || l > r || tl > tr) return;

    if (l <= tl && tr <= r) {psh[v]--; Push(v, tl, tr); return;}

    int md = (tl + tr) >> 1;

    upd(v + v, tl, md, l, r);

    upd(v + v + 1, md + 1, tr, l, r);

    com(v);
}

void upd(int v, int tl, int tr, int l, int r, int ps)
{
    Push(v, tl, tr);

    if (tr < l || r < tl || l > r || tl > tr) return;

    if (l <= tl && tr <= r) {updater(v, ps, tl, tr); Push(v, tl, tr); return;}

    int md = (tl + tr) >> 1;

    upd(v + v, tl, md, l, r, ps);

    upd(v + v + 1, md + 1, tr, l, r, ps);

    com(v);
}

void dfs(int v)
{
    pair <int, int> pt;

    pt.F = id++;

    for (auto it : g[v])
      dfs(it);

    pt.S = id++;

    gt[v].PB(pt);
}

void init(int k, vector<int> r)
{
    K = k;

    n = sz(r);

    if (k == 2)
    {
        set <int> se; se.clear();

        for (int i = 0; i < sz(r); i++) se.insert(i);

        for (int i = 0; i < sz(r); i++)
        {
            int nxt = (i + 1) % sz(r);

            if (r[i] == 1) {g[nxt].insert(i); se.erase(i);}
              else {g[i].insert(nxt);se.erase(nxt);}
        }

        for (auto it : se) dfs(it);

        return;
    }

    a = r;

    bld(1, 0, n - 1);

    for (int i = 0; i < n; i++)
        if (r[i] == 0)
        {
            upd(1, 0, n - 1, 0, i - 1, i);

            upd(1, 0, n - 1, i + 1, n - 1, i);
        }

    int cur = n;

    while (cur > 0)
    {
        vector <int> gr; gr.clear();

        while (t[1][0] == 0)
        {
            gr.PB(t[1][2]);

            upd(1, 0, n - 1, t[1][2]);
        }

        sort(all(gr));

        vector <int> val(sz(gr));

        vector <pair <int, int> > nxt(sz(gr));

        set <pair <int, int> > se; se.clear();

        for (int i = 0; i < sz(gr); i++)
        {
            if (i == 0) {nxt[i].F = sz(gr) - 1; val[i] = gr[i] + n - gr.back();}
              else {nxt[i].F = i - 1; val[i] = gr[i] - gr[i - 1];}

            if (i + 1 == sz(gr)) nxt[i].S = 0;
              else nxt[i].S = i + 1;

            se.insert({val[i], i});
        }

        while (sz(se) > 0)
        {
            int ps = (*se.rbegin()).S;

            se.erase(*se.rbegin());

            int pos = gr[ps];

            h[pos] = cur--;

            if (sz(se) != 0)
            {
                nxt[nxt[ps].F].S = nxt[ps].S;

                nxt[nxt[ps].S].F = nxt[ps].F;

                int l = nxt[ps].F, r = nxt[ps].S;

                se.erase({val[r], r});

                if (gr[l] < gr[r]) val[r] = gr[r] - gr[l];
                  else val[r] = n - gr[l] + gr[r];

                se.insert({val[r], r});
            }

            upd(1, 0, n - 1, 0, n - 1, pos);

            upd(1, 0, n - 1, max(0, pos - k + 1), pos - 1);

            if (pos - k + 1 < 0) upd(1, 0, n - 1, n - abs(pos - k + 1), n - 1);
        }
    }

	return;
}

int compare_plants(int x, int y)
{
    if (K == 2)
    {
        for (auto it : gt[x])
          for (auto itr : gt[y])
            if (it.F <= itr.F && itr.S <= it.S) return 1;
              else if (itr.F <= it.F && it.S <= itr.S) return -1;

        return 0;
    }

    if (h[x] > h[y]) return 1;

    return -1;
}

//int main()
//{
////    freopen("help.in", "r", stdin); freopen("help.out", "w", stdout);
//
//    ios_base::sync_with_stdio(0); istream::sync_with_stdio(0); cin.tie(0); cout.tie(0);
//
//    init(4, {2, 3, 1, 0, 3, 1, 2});
//
//    for (int i = 0; i < 7; i++) cout << h[i] << " ";
//}

Compilation message

plants.cpp: In function 'void updater(int, int, int, int)':
plants.cpp:54:20: warning: statement has no effect [-Wunused-value]
   54 |           else psr - psp[v];
      |                ~~~~^~~~~~~~
plants.cpp:57:20: warning: statement has no effect [-Wunused-value]
   57 |           else psr - ps;
      |                ~~~~^~~~
plants.cpp:59:9: warning: 'len2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   59 |         if (len2 > len1) psp[v] = ps;
      |         ^~
plants.cpp:59:9: warning: 'len1' may be used uninitialized in this function [-Wmaybe-uninitialized]
plants.cpp: In function 'void Push(int, int, int)':
plants.cpp:59:9: warning: 'len2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   59 |         if (len2 > len1) psp[v] = ps;
      |         ^~
plants.cpp:49:19: note: 'len2' was declared here
   49 |         int len1, len2;
      |                   ^~~~
plants.cpp:59:9: warning: 'len1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   59 |         if (len2 > len1) psp[v] = ps;
      |         ^~
plants.cpp:49:13: note: 'len1' was declared here
   49 |         int len1, len2;
      |             ^~~~
plants.cpp:59:9: warning: 'len2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   59 |         if (len2 > len1) psp[v] = ps;
      |         ^~
plants.cpp:49:19: note: 'len2' was declared here
   49 |         int len1, len2;
      |                   ^~~~
plants.cpp:59:9: warning: 'len1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   59 |         if (len2 > len1) psp[v] = ps;
      |         ^~
plants.cpp:49:13: note: 'len1' was declared here
   49 |         int len1, len2;
      |             ^~~~
plants.cpp: In function 'void upd(int, int, int, int, int, int)':
plants.cpp:59:9: warning: 'len2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   59 |         if (len2 > len1) psp[v] = ps;
      |         ^~
plants.cpp:49:19: note: 'len2' was declared here
   49 |         int len1, len2;
      |                   ^~~~
plants.cpp:59:9: warning: 'len1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   59 |         if (len2 > len1) psp[v] = ps;
      |         ^~
plants.cpp:49:13: note: 'len1' was declared here
   49 |         int len1, len2;
      |             ^~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14464 KB Output is correct
2 Correct 11 ms 14464 KB Output is correct
3 Correct 11 ms 14464 KB Output is correct
4 Correct 11 ms 14464 KB Output is correct
5 Correct 11 ms 14464 KB Output is correct
6 Correct 81 ms 17252 KB Output is correct
7 Correct 105 ms 19080 KB Output is correct
8 Correct 235 ms 34428 KB Output is correct
9 Correct 224 ms 34040 KB Output is correct
10 Correct 224 ms 34168 KB Output is correct
11 Correct 222 ms 35576 KB Output is correct
12 Correct 221 ms 38904 KB Output is correct
13 Correct 222 ms 43512 KB Output is correct
14 Correct 235 ms 43384 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14464 KB Output is correct
2 Correct 10 ms 14464 KB Output is correct
3 Correct 11 ms 14464 KB Output is correct
4 Correct 11 ms 14464 KB Output is correct
5 Correct 11 ms 14464 KB Output is correct
6 Correct 15 ms 14592 KB Output is correct
7 Correct 96 ms 17656 KB Output is correct
8 Incorrect 13 ms 14464 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14464 KB Output is correct
2 Correct 10 ms 14464 KB Output is correct
3 Correct 11 ms 14464 KB Output is correct
4 Correct 11 ms 14464 KB Output is correct
5 Correct 11 ms 14464 KB Output is correct
6 Correct 15 ms 14592 KB Output is correct
7 Correct 96 ms 17656 KB Output is correct
8 Incorrect 13 ms 14464 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14464 KB Output is correct
2 Correct 11 ms 14464 KB Output is correct
3 Incorrect 88 ms 17528 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 14464 KB Output is correct
2 Correct 11 ms 14464 KB Output is correct
3 Correct 11 ms 14464 KB Output is correct
4 Correct 12 ms 14464 KB Output is correct
5 Incorrect 11 ms 14464 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14464 KB Output is correct
2 Correct 10 ms 14464 KB Output is correct
3 Correct 12 ms 14464 KB Output is correct
4 Incorrect 10 ms 14464 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14464 KB Output is correct
2 Correct 11 ms 14464 KB Output is correct
3 Correct 11 ms 14464 KB Output is correct
4 Correct 11 ms 14464 KB Output is correct
5 Correct 11 ms 14464 KB Output is correct
6 Correct 81 ms 17252 KB Output is correct
7 Correct 105 ms 19080 KB Output is correct
8 Correct 235 ms 34428 KB Output is correct
9 Correct 224 ms 34040 KB Output is correct
10 Correct 224 ms 34168 KB Output is correct
11 Correct 222 ms 35576 KB Output is correct
12 Correct 221 ms 38904 KB Output is correct
13 Correct 222 ms 43512 KB Output is correct
14 Correct 235 ms 43384 KB Output is correct
15 Correct 11 ms 14464 KB Output is correct
16 Correct 10 ms 14464 KB Output is correct
17 Correct 11 ms 14464 KB Output is correct
18 Correct 11 ms 14464 KB Output is correct
19 Correct 11 ms 14464 KB Output is correct
20 Correct 15 ms 14592 KB Output is correct
21 Correct 96 ms 17656 KB Output is correct
22 Incorrect 13 ms 14464 KB Output isn't correct
23 Halted 0 ms 0 KB -