oj.uz

답안 #1078226

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1078226 2024-08-27T14:15:44 Z anango 식물 비교 (IOI20_plants) C++17
27 / 100
 465 ms 13804 KB 
#include "plants.h"
#include <bits/stdc++.h>
using namespace std;

int K;
int n;
vector<int> b;
int INF = 1LL<<30;

int tree[524288];
int lazy[524288]; //min add segtree

void push(int v, int tl, int tr) {
    if (tl<tr) {
        lazy[2*v]+=lazy[v];
        lazy[2*v+1]+=lazy[v];
    }
    tree[v]+=lazy[v];
    lazy[v] = 0;
}

void update(int v, int l, int r, int tl, int tr, int addend) {
    push(v,tl,tr);
    if (l>tr || r<tl) return;
    if (l<=tl && tr<=r) {
        if (tl<tr) {
            lazy[2*v]+=addend;
            lazy[2*v+1]+=addend;
        }
        tree[v]+=addend;
        return;
    }
    int m = (tl+tr)/2;
    update(2*v,l,r,tl,m,addend);
    update(2*v+1,l,r,m+1,tr,addend);
    tree[v] = min(tree[2*v],tree[2*v+1]);
}

int query(int v, int l, int r, int tl, int tr) {
    push(v,tl,tr);
    if (l>tr || r<tl) return INF;
    if (l<=tl && tr<=r) return tree[v];
    int m = (tl+tr)/2;
    return min(query(2*v,l,r,tl,m),query(2*v+1,l,r,m+1,tr));
}

int query2(int v, int l, int r, int tl, int tr) {
    //cout << v <<" " << l <<" " << r <<" " << tl <<" " << tr << endl;
    //finds the first 0 in range (l,r)
    push(v,tl,tr);
    if (l>tr || r<tl) return INF;
    /*for (int i=l; i<=r; i++) {
        update(1,i,i,0,262143,0); //to push
        if (tree[262144+i]==0) {
            return i;
        }
    }*/
    if (tree[v]>0) return INF;
    if (tl==tr) {
        return tl;
    }
    int m = (tl+tr)/2;
    int an = query2(2*v,l,r,tl,m);
    if (an!=INF) {
        return an;
    }
    return query2(2*v+1,l,r,m+1,tr);


}

vector<int> p;
void init(int k, std::vector<int> r) {
    for (int i=0; i<524288; i++) tree[i] = lazy[i] = INF;
    K=k;
    b=r;
    n=r.size();
    p=vector<int>(n,-1);
    for (int i=0; i<n; i++) {
        update(1,i,i,0,262143,r[i]);
    }
    //let l[i] be the number of plants j in the k-1 indices before i such that i is higher than j
    //any 0 value is higher than the k-1 indices after it
    //get any 0 that does not have a 0 in the k-1 indices before
    //and subtract 1 from these indices
    int height = n;
    for (int op=0; op<n; op++) {
        /*cout << "SEGTREE STATE" << endl;
        for (int i=0; i<n; i++) {
            cout << query(1,i,i,0,262143) <<" ";
        }
        cout << endl;*/
        int x = query2(1,0,n-1,0,262143);
        assert(x!=INF);
        int li = x-k+1; li%=n; li+=n; li%=n;
        int ri = x-1; ri%=n; ri+=n; ri%=n;
        int an = INF;
        int jambloat = -1;
        
        if (li<=ri) {
            an=min(query(1,li,ri,0,262143),INF);
        }
        else {
            an=min(query(1,li,n-1,0,262143),query(1,0,ri,0,262143));
        }
        if (an!=0) {
            jambloat = x;
        }
        else {
            if (li<=ri) {
                jambloat=min(query2(1,li,ri,0,262143),INF);
            }
            else {
                if (query2(1,li,n-1,0,262143)>=INF/2) {
                    jambloat = query2(1,0,ri,0,262143);
                }
                else {
                    jambloat=query2(1,li,n-1,0,262143);  
                }
            }
        }
        li = jambloat-k+1; li%=n; li+=n; li%=n;
        ri = jambloat-1; ri%=n; ri+=n; ri%=n;
        if (li<=ri) {
            update(1,li,ri,0,262143,-1);
        }
        else {
            update(1,li,n-1,0,262143,-1);
            update(1,0,ri,0,262143,-1);
        }
        update(1,jambloat,jambloat,0,262143,INF-query(1,jambloat,jambloat,0,262143));
        //cout << "doing " << jambloat << endl;
        p[jambloat] = height;
        height--;

    }
    /*for (int i=0; i<n; i++) {
        cout << p[i] <<" ";
    }
    cout << endl;*/
	return;
}

int compare_plants(int x, int y) {
    if (p[x]>p[y]) return 1;
    else if (p[x]<p[y]) return -1;
	return 0;
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4440 KB Output is correct
2 Correct 2 ms 4440 KB Output is correct
3 Correct 2 ms 4444 KB Output is correct
4 Incorrect 2 ms 4444 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4444 KB Output is correct
2 Correct 2 ms 4444 KB Output is correct
3 Correct 2 ms 4444 KB Output is correct
4 Correct 2 ms 4444 KB Output is correct
5 Correct 3 ms 4440 KB Output is correct
6 Correct 5 ms 4444 KB Output is correct
7 Correct 43 ms 7276 KB Output is correct
8 Correct 3 ms 4440 KB Output is correct
9 Correct 4 ms 4444 KB Output is correct
10 Correct 45 ms 7216 KB Output is correct
11 Correct 44 ms 7256 KB Output is correct
12 Correct 42 ms 7424 KB Output is correct
13 Correct 62 ms 7252 KB Output is correct

Subtask #3
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4444 KB Output is correct
2 Correct 2 ms 4444 KB Output is correct
3 Correct 2 ms 4444 KB Output is correct
4 Correct 2 ms 4444 KB Output is correct
5 Correct 3 ms 4440 KB Output is correct
6 Correct 5 ms 4444 KB Output is correct
7 Correct 43 ms 7276 KB Output is correct
8 Correct 3 ms 4440 KB Output is correct
9 Correct 4 ms 4444 KB Output is correct
10 Correct 45 ms 7216 KB Output is correct
11 Correct 44 ms 7256 KB Output is correct
12 Correct 42 ms 7424 KB Output is correct
13 Correct 62 ms 7252 KB Output is correct
14 Correct 74 ms 7508 KB Output is correct
15 Correct 465 ms 13744 KB Output is correct
16 Correct 75 ms 9680 KB Output is correct
17 Correct 458 ms 13648 KB Output is correct
18 Correct 429 ms 13296 KB Output is correct
19 Correct 377 ms 13804 KB Output is correct
20 Correct 459 ms 13664 KB Output is correct

Subtask #4
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4440 KB Output is correct
2 Correct 2 ms 4440 KB Output is correct
3 Incorrect 39 ms 8932 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4444 KB Output is correct
2 Correct 2 ms 4348 KB Output is correct
3 Incorrect 2 ms 4440 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4444 KB Output is correct
2 Correct 2 ms 4444 KB Output is correct
3 Incorrect 2 ms 4444 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4440 KB Output is correct
2 Correct 2 ms 4440 KB Output is correct
3 Correct 2 ms 4444 KB Output is correct
4 Incorrect 2 ms 4444 KB Output isn't correct
5 Halted 0 ms 0 KB -