oj.uz

Submission #1045652

# Submission time Handle Problem Language Result Execution time Memory
1045652 2024-08-06T06:45:46 Z nightfal Comparing Plants (IOI20_plants) C++17
19 / 100
 1080 ms 268484 KB 
// #include "plants.h"
#include <iostream>
#include <cstdio>
#include <cassert>
#include <vector>
#include <utility>
#include <algorithm>

// using namespace std;
#define maxVal 1'000'000'001
static std:: vector<int> rank,lz,lzr;
static std:: vector<std::pair<int,int>> t,tr;
static std:: vector<std::vector<int>> g;
static std:: vector<std::vector<std::vector<int>>> power;

static int l,m,q2;
void print(std::pair<int,int> p) {std::cout << "(" << p.first << "," << p.second << ") "; };
void print(std::vector<int> &v) {for(int elem: v) std::cout << elem << " "; std::cout << std::endl;}
void print(std::vector<std::vector<int>> &v) {for (auto elem: v) print(elem); std::cout << std::endl;}
void print(std::vector<std::pair<int,int>> &v) {for(auto [a,b]: v) std::cout << "(" << a << "," << b << ") ";std::cout << std::endl;}
void print(std::vector<std::vector<std::vector<int>>> &v) {for (auto elem: v) print(elem); std::cout << std::endl;}

std::pair<int,int> update(std::vector<std::pair<int,int>> &t, std::vector<int> &lz, int node,int start,int end,int left,int right,int diff) {
    if (left <= start and end <= right) lz[node] += diff;
    if (start!=end) { lz[2*node] += lz[node]; lz[2*node+1] += lz[node];}
    t[node].first += lz[node]; lz[node]=0;
    if (right < start or end < left) return {maxVal,m+1};
    if (left <= start and end <= right) return t[node];

    int mid=(start+end)/2;
    auto ans1  = update(t,lz,2*node,start,mid,left,right,diff);
    auto ans2  = update(t,lz,2*node+1,mid+1,end,left,right,diff);
    auto ans = std::min(ans1,ans2);
    t[node] = std::min(t[2*node],t[2*node+1]);
    return ans;    
}
std::pair<int,int> findMin(std::vector<std::pair<int,int>> &t, std::vector<int> &lz, int node, int start, int end, int left, int right) {
    if (start!=end) {lz[2*node] += lz[node]; lz[2*node+1] += lz[node];}
    t[node].first += lz[node]; lz[node]=0;
    if (right < start or end < left) return {maxVal,m+1};
    if (left <= start and end <= right) return t[node];
    
    int mid=(start+end)/2;
    auto min1 = findMin(t,lz,2*node,start,mid,left,right);
    auto min2 = findMin(t,lz,2*node+1,mid+1,end,left,right);
    auto ans = std::min(min1,min2);
    t[node] = std::min(t[2*node],t[2*node+1]);    
    return ans;
}
void segInit(std::vector<int> &r, std::vector<std::pair<int,int>> &t, int node, int start, int end) {
    if (start==end) {t[node]={r[start],start}; return;}
    int mid=(start+end)/2;
    segInit(r,t, 2*node,start,mid);
    segInit(r,t, 2*node+1,mid+1,end);
    t[node] = std::min(t[2*node],t[2*node+1]);
    return;
}
int findPreMinI(std::vector<std::pair<int,int>> &t, std::vector<int> &lz, int k,int minI1) {
    int ans = minI1;
    if (minI1>0) {
        auto[min2,minI2] = findMin(t,lz,1,0,m-1,std::max(0,minI1-k+1),minI1-1);
        if (min2==0) ans = minI2;
    }
    if (minI1-k+1<0) {
        auto[min2,minI2] = findMin(t,lz,1,0,m-1,minI1-k+1+m,m-1);
        if (min2==0) ans = minI2;
    }
    return ans;
}
int computeRank(std::vector<std::pair<int,int>> &t, std::vector<int> &lz, int minI1, int k, int ranking) {

    if (rank[minI1]!=m) return ranking;
    int minI2 = findPreMinI(t,lz,k,minI1);

    while (minI2 != minI1) {
        ranking = computeRank(t,lz,minI2,k,ranking); 
        minI2 = findPreMinI(t,lz,k,minI1);
    }
    rank[minI1] = ranking--;
    update(t,lz,1,0,m-1,minI1,minI1,m-1);
    update(t,lz,1,0,m-1,std::max(0,minI1-k+1),minI1-1,-1);
    if (minI1-k+1<0) update(t,lz,1,0,m-1,minI1-k+1+m,m-1,-1);

    return ranking;
}

bool inRangeLeft(int z, int y, int left) {return y < z && (z < left || left <= y) || z < y && (z < left && left <= y);}
bool inRangeRight(int z, int y, int right) {return z < y && (right < z || y <= right) || y < z && (y <= right && right < z);}

int compare(int x, int y) {
    int left, i=0, z=x;
    while(true) {
        left = power[i][z][0];
        if(left==-1 || inRangeLeft(z,y,left)) break;
        i++;
    }
    for(int j=i-1; j>=0; j--) {
        left = power[j][z][0];
        if (left!=-1 && !inRangeLeft(z,y,left)) z = left; 
    }
    left = power[0][z][0];
    if (left!=-1 && inRangeLeft(z,y,left) && -rank[z]>-rank[y]) return 1;

    int right; 
    i=0; z= x;
    while(true) {
        right = power[i][z][1];
        if(right==-1 || inRangeRight(z,y,right)) break;
        i++;
    }
    for(int j=i-1; j>=0; j--) {
        right = power[j][z][1];
        if(right!=-1 && !inRangeRight(z,y,right)) z = right;
    }
    right = power[0][z][1];
    if(right!=-1 && inRangeRight(z,y,right) && -rank[z]>-rank[y]) return 1;

    return 0;
}
void calPower() {
    int x = m-1, cnt=1;
    while (x) {x>>=1; cnt++;}
    cnt++;
    power.resize(cnt,std::vector<std::vector<int>>(m,std::vector<int>(2,-1)));
    for(int j=0; j<m; j++)
        for(int x=0; x<2; x++)
            power[0][j][x] = g[j][x];
    
    for (int i=1; i<cnt; i++)
        for(int j=0; j<m; j++)
            for(int x=0; x<2; x++) {
                if (power[i-1][j][x] == -1) power[i][j][x] = -1;
                else power[i][j][x] = power[i-1][power[i-1][j][x]][x];
            }
    // std::cout << "rank: "<<std::endl; print(rank);
    // std::cout << "power: "<<std::endl; print(power);
    // std::cout << "rangeLR: "<<std::endl; print(rangeLR);
}
void calReachability(int k) {
    tr.resize(4*m); lzr.resize(4*m);
    std::vector<std::pair<int,int>> rankInv;
    for(int i=0; i<m; i++) {rank[i] = -rank[i]; rankInv.push_back({rank[i],i}); }
    sort(rankInv.begin(),rankInv.end());
    segInit(rank,tr,1,0,m-1);

    g.resize(m,std::vector<int>(2,-1));
    
    for(auto [val,i]: rankInv) {
        std::pair<int,int> temp1, temp2;
        temp1 = temp2 = findMin(tr,lzr,1,0,m-1,std::max(0,i-k+1),i-1);
        if (i-k+1<0) temp2 = findMin(tr,lzr,1,0,m-1,i-k+1+m,m-1);
        temp1 = std::min(temp1,temp2); 
        if (temp1.first <=0) g[i][0] = temp1.second;

        temp1 = temp2 = findMin(tr,lzr,1,0,m-1,i+1,std::min(m-1,i+k-1));
        if (i+k-1>m-1) temp2 = findMin(tr,lzr,1,0,m-1,0,i+k-1-m);
        temp1 = std::min(temp1,temp2);
        if (temp1.first <= 0) g[i][1] = temp1.second;
        update(tr,lzr,1,0,m-1,i,i,m);
    }

    calPower();
    return;
}
void init6(int k, std::vector<int> &r) {
    int n = r.size(); 
    t.resize(4*n); lz.resize(4*n); 
    segInit(r,t,1,0,n-1);
    rank.resize(n,n);
    int ranking = n-1;
    while (ranking >=0) {
        auto [min1,minI1] = findMin(t,lz,1,0,n-1,0,n-1);
        ranking = computeRank(t,lz,minI1,k,ranking);
    }
    calReachability(k);
    return;
}

void init(int k, std::vector<int> r) {
    int n = r.size(); 
    m=n; l=k;
    init6(k,r);
	return;
}
int compare_plants(int x, int y) {
    int ans = compare(x,y);
    if (ans) return ans;
    else return -compare(y,x);
}

Compilation message

plants.cpp: In function 'bool inRangeLeft(int, int, int)':
plants.cpp:87:56: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   87 | bool inRangeLeft(int z, int y, int left) {return y < z && (z < left || left <= y) || z < y && (z < left && left <= y);}
      |                                                  ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
plants.cpp: In function 'bool inRangeRight(int, int, int)':
plants.cpp:88:58: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   88 | bool inRangeRight(int z, int y, int right) {return z < y && (right < z || y <= right) || y < z && (y <= right && right < z);}
      |                                                    ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
plants.cpp: At global scope:
plants.cpp:16:16: warning: 'q2' defined but not used [-Wunused-variable]
   16 | static int l,m,q2;
      |                ^~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 29 ms 3056 KB Output is correct
7 Correct 150 ms 25704 KB Output is correct
8 Correct 488 ms 266436 KB Output is correct
9 Correct 555 ms 266568 KB Output is correct
10 Correct 647 ms 266432 KB Output is correct
11 Correct 737 ms 266432 KB Output is correct
12 Correct 785 ms 266596 KB Output is correct
13 Correct 880 ms 266436 KB Output is correct
14 Correct 991 ms 266600 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 3 ms 1372 KB Output is correct
7 Correct 66 ms 8444 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 5 ms 1372 KB Output is correct
10 Correct 67 ms 8268 KB Output is correct
11 Correct 74 ms 8184 KB Output is correct
12 Correct 112 ms 8520 KB Output is correct
13 Correct 62 ms 8276 KB Output is correct

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 3 ms 1372 KB Output is correct
7 Correct 66 ms 8444 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 5 ms 1372 KB Output is correct
10 Correct 67 ms 8268 KB Output is correct
11 Correct 74 ms 8184 KB Output is correct
12 Correct 112 ms 8520 KB Output is correct
13 Correct 62 ms 8276 KB Output is correct
14 Correct 147 ms 25784 KB Output is correct
15 Correct 931 ms 266588 KB Output is correct
16 Incorrect 129 ms 25872 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 78 ms 5104 KB Output is correct
4 Correct 1080 ms 268140 KB Output is correct
5 Incorrect 1078 ms 266692 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 848 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 10 ms 1116 KB Output is correct
8 Incorrect 9 ms 1220 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 4 ms 1124 KB Output is correct
6 Correct 680 ms 266548 KB Output is correct
7 Correct 815 ms 266612 KB Output is correct
8 Correct 806 ms 266588 KB Output is correct
9 Correct 923 ms 266600 KB Output is correct
10 Correct 659 ms 266692 KB Output is correct
11 Correct 734 ms 266432 KB Output is correct
12 Correct 752 ms 268484 KB Output is correct
13 Correct 837 ms 266688 KB Output is correct
14 Incorrect 803 ms 266552 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 29 ms 3056 KB Output is correct
7 Correct 150 ms 25704 KB Output is correct
8 Correct 488 ms 266436 KB Output is correct
9 Correct 555 ms 266568 KB Output is correct
10 Correct 647 ms 266432 KB Output is correct
11 Correct 737 ms 266432 KB Output is correct
12 Correct 785 ms 266596 KB Output is correct
13 Correct 880 ms 266436 KB Output is correct
14 Correct 991 ms 266600 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 3 ms 1372 KB Output is correct
21 Correct 66 ms 8444 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 5 ms 1372 KB Output is correct
24 Correct 67 ms 8268 KB Output is correct
25 Correct 74 ms 8184 KB Output is correct
26 Correct 112 ms 8520 KB Output is correct
27 Correct 62 ms 8276 KB Output is correct
28 Correct 147 ms 25784 KB Output is correct
29 Correct 931 ms 266588 KB Output is correct
30 Incorrect 129 ms 25872 KB Output isn't correct
31 Halted 0 ms 0 KB -