oj.uz

Submission #302784

# Submission time Handle Problem Language Result Execution time Memory
302784 2020-09-19T08:06:16 Z MarcoMeijer Comparing Plants (IOI20_plants) C++14
32 / 100
 2264 ms 102632 KB 
#include "plants.h"
#include <bits/stdc++.h>

using namespace std;

#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define RE(a,b) REP(a,0,b)
#define FOR(a,b) for(auto& a:b)
#define pb push_back
#define fi first
#define se second
#define all(a) a.begin(), a.end()

typedef long long ll;
typedef pair<int,int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;

const int INF=1e9;
const int MX=4e5+100;

int n, k;
vi r;
int h[MX];
int htoi[MX];
int nxtUp[MX][20];
int nxtDo[MX][20];

int END;

struct Seg {
    ii SEG[MX*4]; int LAZY[MX*4];
    void build(const vi& f, int p=0, int l=0, int r=n-1) {
        LAZY[p] = 0;
        if(l == r) {
            SEG[p] = {f[l], l};
            return;
        }
        int m=(l+r)/2;
        build(f,p*2+1,l,m);
        build(f,p*2+2,m+1,r);
        SEG[p] = max(SEG[p*2+1], SEG[p*2+2]);
    }
    void add(int i, int j, int v, int lazy=0, int p=0, int l=0, int r=n-1) {
        LAZY[p] += lazy;
        SEG[p].fi += lazy;
        if(j < l || i > r) return;
        if(i <= l && j >= r) {
            SEG[p].fi += v;
            LAZY[p] += v;
            return;
        }
        int m=(l+r)/2;
        add(i,j,v,LAZY[p],p*2+1,l,m);
        add(i,j,v,LAZY[p],p*2+2,m+1,r);
        LAZY[p] = 0;
        SEG[p] = max(SEG[p*2+1], SEG[p*2+2]);
    }
    void addRound(int i, int j, int v) {
        if(i >= n) i-=n, j-=n;
        if(j < n) {
            add(i,j,v);
        } else {
            add(i,n-1,v);
            add(0,j-n,v);
        }
    }
} seg1, seg2;

struct SegMin {
    int SEG[MX*2];
    void build() {
        RE(i,n*2) SEG[i+n*2]=END;
        REV(i,1,n*2) SEG[i]=min(SEG[i*2],SEG[i*2+1]);
    }
    void set(int x, int v) {
        for(SEG[x+=n*2]=v; x>1; x/=2) SEG[x/2]=min(SEG[x],SEG[x^1]);
    }
    int get(int l, int r) {
        int ans=INF;
        for(l+=n*2,r+=n*2; l<r; l/=2, r/=2) {
            if(l&1) ans = min(ans,SEG[l++]);
            if(r&1) ans = min(ans,SEG[--r]);
        }
        return ans;
    }
} segH;

void init(int _k, vi _r) {
    k = _k; r = _r;
    n = r.size();
    END = n*2;

    seg1.build(r);
    seg2.build(vi(n,0));

    RE(i,n) {
        while(seg1.SEG[0].fi == k-1) {
            int x = seg1.SEG[0].se;
            seg1.add(x,x,-INF);
            seg2.add(x,x,1);
            seg2.addRound(x+1,x+k-1,-1);
        }

        int x = seg2.SEG[0].se;
        seg2.add(x,x,-INF);
        seg2.addRound(x+1,x+k-1,1);
        seg1.addRound(x+n-k+1,x+n-1,1);
        h[x] = h[x+n] = i;
        htoi[i] = x;
    }

    htoi[END] = END;
    // calculate next up
    {
	    nxtUp[END][0] = END;
        segH.build();
        REV(i,0,n) {
            int x = htoi[i];
            segH.set(x,i);
            segH.set(x+n,i);
            int nxt = htoi[segH.get(x+1,x+k)];
            if(nxt < x) nxt += n;
            nxtUp[x][0] = nxt;
            nxtUp[x+n][0] = min(END,nxt+n);
        }
    }
    
    // calculate next do
    {
	    nxtDo[END][0] = END;
        segH.build();
        REP(i,0,n) {
            int x = htoi[i];
            segH.set(x,i);
            segH.set(x+n,i);
            int nxt = htoi[segH.get(x+1,x+k)];
            if(nxt < x) nxt += n;
            nxtDo[x][0] = nxt;
            nxtDo[x+n][0] = min(END,nxt+n);
        }
    }

    REP(j,1,20) {
        RE(i,n*2+1) {
            nxtDo[i][j] = nxtDo[nxtDo[i][j-1]][j-1];
            nxtUp[i][j] = nxtUp[nxtUp[i][j-1]][j-1];
        }
    }

    return;
}

int getNextUp(int i, int j) {
    RE(x,20) if(j&(1<<x)) i = nxtUp[i][x];
    return i;
}
int getNextDo(int i, int j) {
    RE(x,20) if(j&(1<<x)) i = nxtDo[i][x];
    return i;
}

int comp(int x, int y) {
    if(y < x) y += n;
    if(h[x] < h[y]) {
        int lb=0, ub=n-1;
        while(lb != ub) {
            int mid=(lb+ub)/2;
            if(getNextUp(x,mid)+k-1 >= y) ub=mid;
            else lb=mid+1;
        }
        int i = getNextUp(x,lb);
        if(i != END && i+k-1 >= y && h[i] < h[y]) return -1;
        return 0;
    } else {
        int lb=0, ub=n-1;
        while(lb != ub) {
            int mid=(lb+ub)/2;
            if(getNextDo(x,mid)+k-1 >= y) ub=mid;
            else lb=mid+1;
        }
        int i = getNextDo(x,lb);
        if(i != END && i+k-1 >= y && h[i] > h[y]) return 1;
        return 0;
    }
}
int compare_plants(int x, int y) {
    int res = comp(x,y);
    if(res != 0) return res;
    return -comp(y,x);
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 25472 KB Output is correct
2 Correct 15 ms 25472 KB Output is correct
3 Correct 15 ms 25472 KB Output is correct
4 Correct 15 ms 25472 KB Output is correct
5 Correct 15 ms 25472 KB Output is correct
6 Correct 139 ms 28224 KB Output is correct
7 Correct 369 ms 35832 KB Output is correct
8 Correct 1038 ms 102632 KB Output is correct
9 Correct 1225 ms 102248 KB Output is correct
10 Correct 1515 ms 102376 KB Output is correct
11 Correct 1974 ms 102248 KB Output is correct
12 Correct 2211 ms 102372 KB Output is correct
13 Correct 2243 ms 102372 KB Output is correct
14 Correct 2264 ms 102372 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 25472 KB Output is correct
2 Correct 15 ms 25472 KB Output is correct
3 Correct 15 ms 25472 KB Output is correct
4 Correct 15 ms 25472 KB Output is correct
5 Correct 16 ms 25472 KB Output is correct
6 Correct 22 ms 25848 KB Output is correct
7 Correct 200 ms 30256 KB Output is correct
8 Correct 19 ms 25472 KB Output is correct
9 Correct 22 ms 25856 KB Output is correct
10 Correct 202 ms 30268 KB Output is correct
11 Correct 190 ms 30072 KB Output is correct
12 Correct 216 ms 30328 KB Output is correct
13 Correct 199 ms 30328 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 25472 KB Output is correct
2 Correct 15 ms 25472 KB Output is correct
3 Correct 15 ms 25472 KB Output is correct
4 Correct 15 ms 25472 KB Output is correct
5 Correct 16 ms 25472 KB Output is correct
6 Correct 22 ms 25848 KB Output is correct
7 Correct 200 ms 30256 KB Output is correct
8 Correct 19 ms 25472 KB Output is correct
9 Correct 22 ms 25856 KB Output is correct
10 Correct 202 ms 30268 KB Output is correct
11 Correct 190 ms 30072 KB Output is correct
12 Correct 216 ms 30328 KB Output is correct
13 Correct 199 ms 30328 KB Output is correct
14 Correct 329 ms 36088 KB Output is correct
15 Correct 1677 ms 102372 KB Output is correct
16 Correct 333 ms 35952 KB Output is correct
17 Correct 1721 ms 102372 KB Output is correct
18 Correct 1128 ms 102368 KB Output is correct
19 Correct 1750 ms 102376 KB Output is correct
20 Correct 1545 ms 102376 KB Output is correct

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 25472 KB Output is correct
2 Correct 15 ms 25472 KB Output is correct
3 Incorrect 271 ms 29176 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 25472 KB Output is correct
2 Correct 16 ms 25472 KB Output is correct
3 Correct 15 ms 25472 KB Output is correct
4 Correct 15 ms 25472 KB Output is correct
5 Incorrect 15 ms 25472 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 25472 KB Output is correct
2 Correct 15 ms 25472 KB Output is correct
3 Correct 15 ms 25472 KB Output is correct
4 Incorrect 15 ms 25472 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 25472 KB Output is correct
2 Correct 15 ms 25472 KB Output is correct
3 Correct 15 ms 25472 KB Output is correct
4 Correct 15 ms 25472 KB Output is correct
5 Correct 15 ms 25472 KB Output is correct
6 Correct 139 ms 28224 KB Output is correct
7 Correct 369 ms 35832 KB Output is correct
8 Correct 1038 ms 102632 KB Output is correct
9 Correct 1225 ms 102248 KB Output is correct
10 Correct 1515 ms 102376 KB Output is correct
11 Correct 1974 ms 102248 KB Output is correct
12 Correct 2211 ms 102372 KB Output is correct
13 Correct 2243 ms 102372 KB Output is correct
14 Correct 2264 ms 102372 KB Output is correct
15 Correct 15 ms 25472 KB Output is correct
16 Correct 15 ms 25472 KB Output is correct
17 Correct 15 ms 25472 KB Output is correct
18 Correct 15 ms 25472 KB Output is correct
19 Correct 16 ms 25472 KB Output is correct
20 Correct 22 ms 25848 KB Output is correct
21 Correct 200 ms 30256 KB Output is correct
22 Correct 19 ms 25472 KB Output is correct
23 Correct 22 ms 25856 KB Output is correct
24 Correct 202 ms 30268 KB Output is correct
25 Correct 190 ms 30072 KB Output is correct
26 Correct 216 ms 30328 KB Output is correct
27 Correct 199 ms 30328 KB Output is correct
28 Correct 329 ms 36088 KB Output is correct
29 Correct 1677 ms 102372 KB Output is correct
30 Correct 333 ms 35952 KB Output is correct
31 Correct 1721 ms 102372 KB Output is correct
32 Correct 1128 ms 102368 KB Output is correct
33 Correct 1750 ms 102376 KB Output is correct
34 Correct 1545 ms 102376 KB Output is correct
35 Correct 15 ms 25472 KB Output is correct
36 Correct 15 ms 25472 KB Output is correct
37 Incorrect 271 ms 29176 KB Output isn't correct
38 Halted 0 ms 0 KB -