oj.uz

Submission #302793

# Submission time Handle Problem Language Result Execution time Memory
302793 2020-09-19T08:26:30 Z MarcoMeijer Comparing Plants (IOI20_plants) C++14
32 / 100
 2435 ms 102504 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 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 15 ms 25472 KB Output is correct
6 Correct 145 ms 28280 KB Output is correct
7 Correct 364 ms 35912 KB Output is correct
8 Correct 1033 ms 102244 KB Output is correct
9 Correct 1209 ms 102368 KB Output is correct
10 Correct 1495 ms 102372 KB Output is correct
11 Correct 1884 ms 102376 KB Output is correct
12 Correct 2242 ms 102252 KB Output is correct
13 Correct 2435 ms 102376 KB Output is correct
14 Correct 2207 ms 102376 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 25856 KB Output is correct
7 Correct 201 ms 30200 KB Output is correct
8 Correct 21 ms 25600 KB Output is correct
9 Correct 22 ms 25856 KB Output is correct
10 Correct 204 ms 30304 KB Output is correct
11 Correct 185 ms 30072 KB Output is correct
12 Correct 217 ms 30328 KB Output is correct
13 Correct 201 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 25856 KB Output is correct
7 Correct 201 ms 30200 KB Output is correct
8 Correct 21 ms 25600 KB Output is correct
9 Correct 22 ms 25856 KB Output is correct
10 Correct 204 ms 30304 KB Output is correct
11 Correct 185 ms 30072 KB Output is correct
12 Correct 217 ms 30328 KB Output is correct
13 Correct 201 ms 30328 KB Output is correct
14 Correct 332 ms 35960 KB Output is correct
15 Correct 1753 ms 102376 KB Output is correct
16 Correct 333 ms 36088 KB Output is correct
17 Correct 1768 ms 102376 KB Output is correct
18 Correct 1115 ms 102504 KB Output is correct
19 Correct 1740 ms 102376 KB Output is correct
20 Correct 1515 ms 102316 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 268 ms 29052 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# 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 16 ms 25472 KB Output is correct
4 Correct 15 ms 25472 KB Output is correct
5 Incorrect 16 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 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 15 ms 25472 KB Output is correct
6 Correct 145 ms 28280 KB Output is correct
7 Correct 364 ms 35912 KB Output is correct
8 Correct 1033 ms 102244 KB Output is correct
9 Correct 1209 ms 102368 KB Output is correct
10 Correct 1495 ms 102372 KB Output is correct
11 Correct 1884 ms 102376 KB Output is correct
12 Correct 2242 ms 102252 KB Output is correct
13 Correct 2435 ms 102376 KB Output is correct
14 Correct 2207 ms 102376 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 25856 KB Output is correct
21 Correct 201 ms 30200 KB Output is correct
22 Correct 21 ms 25600 KB Output is correct
23 Correct 22 ms 25856 KB Output is correct
24 Correct 204 ms 30304 KB Output is correct
25 Correct 185 ms 30072 KB Output is correct
26 Correct 217 ms 30328 KB Output is correct
27 Correct 201 ms 30328 KB Output is correct
28 Correct 332 ms 35960 KB Output is correct
29 Correct 1753 ms 102376 KB Output is correct
30 Correct 333 ms 36088 KB Output is correct
31 Correct 1768 ms 102376 KB Output is correct
32 Correct 1115 ms 102504 KB Output is correct
33 Correct 1740 ms 102376 KB Output is correct
34 Correct 1515 ms 102316 KB Output is correct
35 Correct 15 ms 25472 KB Output is correct
36 Correct 15 ms 25472 KB Output is correct
37 Incorrect 268 ms 29052 KB Output isn't correct
38 Halted 0 ms 0 KB -