oj.uz

Submission #943691

# Submission time Handle Problem Language Result Execution time Memory
943691 2024-03-11T18:07:17 Z KG07 Comparing Plants (IOI20_plants) C++14
27 / 100
 301 ms 30244 KB 
#include "plants.h"
#include <bits/stdc++.h>
using namespace std;

struct segment_tree{
    int hmin[800008], lazy[800008], hmax[800008], heights[200002];
    vector<long long> left_child[200002], right_child[200002];
    vector<int> m, H;
    int n, h, k;
    void init(int K, vector<int> M){
        n = M.size();
        h = n-1;
        k = K;
        m.clear();
        for(int i = 0; i < 800008; i++){
            hmin[i] = 0;
            lazy[i] = 0;
            hmax[i] = -1;
        }
        for(int i = 0; i < M.size(); i++){
            m.push_back(M[i]);
            H.push_back(-1);
        }
        init_heights(1, 1, n);
    }
    void lazy_update(int N){
        lazy[2*N] += lazy[N];
        lazy[2*N+1] += lazy[N];
        hmin[2*N] += lazy[N];
        hmin[2*N+1] += lazy[N];
        lazy[N] = 0;
    }
    void update(int N, int l, int r, int s, int t){
        if(l > t || r < s)return;
        if(l <= s && r >= t){
            lazy[N]--;
            hmin[N]--;
            return;
        }
        lazy_update(N);
        update(2*N, l, r, s, (s+t)/2);
        update(2*N+1, l, r, (s+t)/2+1, t);
        hmin[N] = min(hmin[2*N], hmin[2*N+1]);
    }
    void init_heights(int N, int l, int r){
        if(l == r){
            hmin[N] = m[r-1];
            return;
        }
        init_heights(2*N, l, (l+r)/2);
        init_heights(2*N+1, (l+r)/2+1, r);
        hmin[N] = min(hmin[2*N], hmin[2*N+1]);
    }
    int get_min(int N, int l, int r, int s, int t){
        if(l > t || r < s)return 1000000000;
        if(l <= s && r >= t)return hmin[N];
        lazy_update(N);
        return min(get_min(2*N, l, r, s, (s+t)/2), get_min(2*N+1, l, r, (s+t)/2+1, t));
    }
    int get_max(int N, int l, int r, int s, int t){
        if(l > t || r < s)return -1;
        if(l <= s && r >= t)return hmax[N];
        return max(get_max(2*N, l, r, s, (s+t)/2), get_max(2*N+1, l, r, (s+t)/2+1, t));
    }
    int left_zero(int N, int l, int r, int s, int t){
        if(l > t || r < s)return -1;
        if(s == t)return hmin[N] == 0 ? s : -1;
        lazy_update(N);
        if(l <= s && r >= t){
            if(hmin[N]>0)return -1;
            if(hmin[2*N+1]>0)return left_zero(2*N, l, r, s, (s+t)/2);
            return left_zero(2*N+1, l, r, (s+t)/2+1, t);
        }
        int z = left_zero(2*N+1, l, r, (s+t)/2+1, t);
        return z == -1 ? left_zero(2*N, l, r, s, (s+t)/2) : z;
    }
    int right_zero(int N, int l, int r, int s, int t){
        if(l > t || r < s)return -1;
        if(s == t)return hmin[N] == 0 ? t : -1;
        lazy_update(N);
        if(l <= s && r >= t){
            if(hmin[N]>0)return -1;
            if(hmin[2*N]>0)return right_zero(2*N+1, l, r, (s+t)/2+1, t);
            return right_zero(2*N, l, r, s, (s+t)/2);
        }
        int z = right_zero(2*N, l, r, s, (s+t)/2);
        return z == -1 ? right_zero(2*N+1, l, r, (s+t)/2+1, t) : z;
    }
    void point_update(int N, int M, int l, int r){
        if(l > M || r < M)return;
        if(l == r){
            hmin[N] = 1000000;
            return;
        }
        lazy_update(N);
        point_update(2*N, M, l, (l+r)/2);
        point_update(2*N+1, M, (l+r)/2+1, r);
        hmin[N] = min(hmin[2*N], hmin[2*N+1]);
    }
    void extract(int N, int M, int l, int r){
        if(l > M || r < M)return;
        if(l == r){
            while(true)
            if(M > 1 && left_zero(1, max(1, M-k), M-1, 1, n) != -1){
                extract(1, left_zero(1, max(1, M-k), M-1, 1, n), 1, n);
            }
            else if(M-k < 1 && left_zero(1, n+M-k, n, 1, n) != -1){
                extract(1, left_zero(1, n+M-k, n, 1, n), 1, n);
            }
            else break;
            if(k*2+2<=n){
                heights[M-1] = h;
                H[h--] = M-1;
            }
            else H[M-1] = h--;
            point_update(1, M, 1, n);
            if(M > 1)update(1, max(1, M-k), M-1, 1, n);
            if(M-k < 1)update(1, n+M-k, n, 1, n);
            return;
        }
        lazy_update(N);
        extract(2*N, M, l, (l+r)/2);
        extract(2*N+1, M, (l+r)/2+1, r);
        hmin[N] = min(hmin[2*N], hmin[2*N+1]);
    }
    void insert_plant(int N, int M, int z, int l, int r){
        if(l > M || r < M)return;
        if(l == r){
            hmax[N] = z;
            return;
        }
        insert_plant(2*N, M, z, l, (l+r)/2);
        insert_plant(2*N+1, M, z, (l+r)/2+1, r);
        hmax[N] = max(hmax[2*N], hmax[2*N+1]);
    }
    void create_child(){
        for(int i = 0; i < H.size(); i++){
            int M = H[i]+1;
            insert_plant(1, M, i, 1, n);
            int z;
            z = max(M>1?get_max(1, max(1, M-k), M-1, 1, n):-1, M-k<1?get_max(1, n+M-k, n, 1, n):-1);
            if(z>-1){
                left_child[M-1].push_back(M-1-H[z]>0?M-1-H[z]:n+M-1-H[z]);
                while(left_child[M-1].size()<=left_child[(M-1+n-left_child[M-1][left_child[M-1].size()-1])%n].size())
                    left_child[M-1].push_back(left_child[M-1][left_child[M-1].size()-1]+
                        left_child[(M-1+n-left_child[M-1][left_child[M-1].size()-1])%n][left_child[M-1].size()-1]);
            }
            z = max(M<n?get_max(1, M+1, min(M+k, n), 1, n):-1, M+k>n?get_max(1, 1, M+k-n, 1, n):-1);
            if(z>-1){
                right_child[M-1].push_back(H[z]-M+1>0?H[z]-M+1:n-M+1+H[z]);
                while(right_child[M-1].size()<=right_child[(M-1+right_child[M-1][right_child[M-1].size()-1])%n].size())
                    right_child[M-1].push_back(right_child[M-1][right_child[M-1].size()-1]+
                        right_child[(M-1+right_child[M-1][right_child[M-1].size()-1])%n][right_child[M-1].size()-1]);
            }
        }
    }
    bool reach_left(long long x, long long y, int z){
        if(z > left_child[x].size())return reach_left(x, y, left_child[x].size());
        while(z && left_child[x][z-1] > y)z--;
        if(z == 0)return heights[x] > heights[(x+n-y)%n];
        return reach_left((x+n-left_child[x][z-1])%n, y-left_child[x][z-1], z-1);
    }
    bool reach_right(long long x, long long y, int z){
        if(z > right_child[x].size())return reach_right(x, y, right_child[x].size());
        while(z && right_child[x][z-1] > y)z--;
        if(z == 0)return heights[x] > heights[(x+y)%n];
        return reach_right((x+right_child[x][z-1])%n, y-right_child[x][z-1], z-1);
    }
} A;

void init(int k, vector<int> r) {
    A.init(k-1, r);
    int n = r.size();
    while(A.h >= 0){
        A.extract(1, A.right_zero(1, 1, n, 1, n), 1, n);
    }
    if(k*2<=A.n)A.create_child();
	return;
}

int compare_plants(int x, int y) {
    if(A.k*2+2>A.n)return A.H[x] > A.H[y] ? 1 : -1;
    if(A.reach_left(x, (x+A.n-y)%A.n, 30) || A.reach_right(x, (y+A.n-x)%A.n, 30))return 1;
    if(A.reach_left(y, (y+A.n-x)%A.n, 30) || A.reach_right(y, (x+A.n-y)%A.n, 30))return -1;
    return 0;
}

Compilation message

plants.cpp: In member function 'void segment_tree::init(int, std::vector<int>)':
plants.cpp:20:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |         for(int i = 0; i < M.size(); i++){
      |                        ~~^~~~~~~~~~
plants.cpp: In member function 'void segment_tree::create_child()':
plants.cpp:137:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  137 |         for(int i = 0; i < H.size(); i++){
      |                        ~~^~~~~~~~~~
plants.cpp: In member function 'bool segment_tree::reach_left(long long int, long long int, int)':
plants.cpp:158:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  158 |         if(z > left_child[x].size())return reach_left(x, y, left_child[x].size());
      |            ~~^~~~~~~~~~~~~~~~~~~~~~
plants.cpp: In member function 'bool segment_tree::reach_right(long long int, long long int, int)':
plants.cpp:164:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  164 |         if(z > right_child[x].size())return reach_right(x, y, right_child[x].size());
      |            ~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 19804 KB Output is correct
2 Correct 4 ms 19804 KB Output is correct
3 Incorrect 4 ms 19804 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 19800 KB Output is correct
2 Correct 5 ms 19804 KB Output is correct
3 Correct 4 ms 19804 KB Output is correct
4 Correct 4 ms 19804 KB Output is correct
5 Correct 4 ms 19800 KB Output is correct
6 Correct 6 ms 20060 KB Output is correct
7 Correct 50 ms 24760 KB Output is correct
8 Correct 5 ms 20060 KB Output is correct
9 Correct 6 ms 20060 KB Output is correct
10 Correct 50 ms 24636 KB Output is correct
11 Correct 53 ms 24660 KB Output is correct
12 Correct 49 ms 24912 KB Output is correct
13 Correct 51 ms 24656 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 19800 KB Output is correct
2 Correct 5 ms 19804 KB Output is correct
3 Correct 4 ms 19804 KB Output is correct
4 Correct 4 ms 19804 KB Output is correct
5 Correct 4 ms 19800 KB Output is correct
6 Correct 6 ms 20060 KB Output is correct
7 Correct 50 ms 24760 KB Output is correct
8 Correct 5 ms 20060 KB Output is correct
9 Correct 6 ms 20060 KB Output is correct
10 Correct 50 ms 24636 KB Output is correct
11 Correct 53 ms 24660 KB Output is correct
12 Correct 49 ms 24912 KB Output is correct
13 Correct 51 ms 24656 KB Output is correct
14 Correct 67 ms 25424 KB Output is correct
15 Correct 301 ms 29992 KB Output is correct
16 Correct 69 ms 25572 KB Output is correct
17 Correct 295 ms 30152 KB Output is correct
18 Correct 222 ms 29612 KB Output is correct
19 Correct 221 ms 30244 KB Output is correct
20 Correct 293 ms 30108 KB Output is correct

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 19804 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 19804 KB Output is correct
2 Correct 5 ms 19804 KB Output is correct
3 Incorrect 4 ms 20000 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 19804 KB Output is correct
2 Correct 4 ms 19804 KB Output is correct
3 Incorrect 5 ms 19840 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 19804 KB Output is correct
2 Correct 4 ms 19804 KB Output is correct
3 Incorrect 4 ms 19804 KB Output isn't correct
4 Halted 0 ms 0 KB -