oj.uz

답안 #807736

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
807736 2023-08-05T00:08:02 Z I_Love_EliskaM_ 식물 비교 (IOI20_plants) C++17
60 / 100
 728 ms 51168 KB 
#include "plants.h"
#include <bits/stdc++.h>
using namespace std;
#define forn(i,_n) for(int i=0;i<_n;++i)
#define all(x) x.begin(),x.end()
#define pb push_back
#define pi pair<int,int>
#define f first
#define s second
using ll = long long;

const int N=2e5+55;
int p[N], L[N], R[N];
int n;
int k;

struct sgt {
	vector<pi> t;
	vector<int> lazy; 
	int sz=1;
	pi merge(pi a, pi b) {
		if (a.f > b.f) return a;
		return b;
	}
	sgt(int n) {
		while (sz<n) sz<<=1;
		t.assign(2*sz,{0,n});
		forn(i,n) t[sz-1+i]={0,i};
		lazy.assign(4*sz,0);
	}
	void push(int v) {
		t[v].f+=lazy[v];
		lazy[2*v+1]+=lazy[v];
		lazy[2*v+2]+=lazy[v];
		lazy[v]=0;
	}
	void add(int v, int l, int r, int lx, int rx, int x) {
		if (lazy[v]) push(v);
		if (rx<=l || r<=lx) return;
		if (lx<=l && r<=rx) {
			lazy[v]+=x;
			push(v);
			return;
		}
		int m=(l+r)>>1;
		add(2*v+1,l,m,lx,rx,x);
		add(2*v+2,m,r,lx,rx,x);
		t[v]=merge(t[2*v+1],t[2*v+2]);
	}
	void add(int l, int r, int x) {
		add(0,0,sz,l,r,x);
	}
	pi query(int v, int l, int r, int lx, int rx) {
		if (lazy[v]) push(v);
		if (rx<=l || r<=lx) return {-2e9,n};
		if (lx<=l && r<=rx) return t[v];
		int m=(l+r)>>1;
		auto lq=query(2*v+1,l,m,lx,rx);
		auto rq=query(2*v+2,m,r,lx,rx);
		t[v]=merge(t[2*v+1],t[2*v+2]);
		return merge(lq,rq);
	}
	pi query(int l, int r) {
		return query(0,0,sz,l,r);
	}
};
sgt st(N);

vector<int> adj[305];
int vis[305];
bitset<305> bs[305];

void dfs(int u) {
	if (vis[u]==1) assert(0);
	if (vis[u]) return;
	bs[u][u]=1;
	vis[u]=1;
	for(auto&v:adj[u]) {
		dfs(v);
		bs[u]|=bs[v];
	}
	vis[u]=2;
}

void init(int _k, vector<int> r) {
	k=_k;
	n=r.size();

	if (n<=300) {
		forn(i,n) r[i]=k-1-r[i];
		forn(i,n) r.pb(r[i]);
		forn(i,n) r.pb(r[i]);
		forn(it,n) {
			for (int i=n; i<2*n; ++i) {
				if (r[i]==k-1) {
					int z=i;
					for (int j=i; j>z-k; --j) if (r[j]==k-1) z=j;
					for (int j=z+1; j<z+k; ++j) {
						if (vis[j%n]) adj[j%n].pb(z%n);
						else adj[z%n].pb(j%n);
					}
					vis[z%n]=1;
					r[z%n]=-1e9;
					for (int j=z; j>z-k; --j) {
						r[(j%n)]++;
						r[(j%n)+n]++;
						r[(j%n)+2*n]++;
					}
					break;
				}
			}
		}
		forn(i,n) vis[i]=0;
		forn(i,n) dfs(i);
		return;
	}

	if (k==2) {
		int z=0;
		forn(i,n) r[i]^=1;
		forn(i,n) if (r[i]==0) z=i;
		for (int i=z+n; i>z; --i) {
			if (r[i%n]) R[i%n]=R[(i+1)%n];
			else R[i%n]=i%n;
		}
		z=0;
		forn(i,n) if (r[i]) z=i;
		++z;
		for (int i=z; i<z+n; ++i) {
			if (r[(i-1+n)%n]) L[i%n]=i%n;
			else L[i%n]=L[(i-1+n)%n];
		}
		forn(i,n) {
			L[i]+=n, R[i]+=n;
		}
		forn(i,n) {
			if (L[i]==R[i] && L[i]==i+n) continue;
			if (L[i]>=R[i]) L[i]-=n;
		}
		return;
	}

	forn(i,n) r.pb(r[i]);
	forn(i,n) r.pb(r[i]);

	sgt st(n);
	forn(i,n) st.add(i,i+1,r[i]);

	int z;
	for (int i=n; i<2*n; ++i) {
		if (r[i]==k-1) {
			z=i;
			for (int j=i; j>z-k; --j) if (r[j]==k-1) z=j;
			break;
		}
	}

	set<int> s;
	set<int> ok;
	int ri=-1;
	for (int l=z; l<z+n; ++l) {
		if (r[l]==k-1) {
			s.insert(l%n);
			s.insert(l%n+n);
			s.insert(l%n+2*n);
			if (l>=ri) {
				ok.insert(l%n);
			}
			ri=l+k;
		}
	}

	int nxt=1;
	forn(it,n) {
		auto x=*ok.begin(); ok.erase(ok.begin());
		
		p[x]=nxt++;

		s.erase(x);
		s.erase(x+n);
		s.erase(x+2*n);
		st.add(x,x+1,-1e9);
		int j=x;
		if (s.size()) {
			auto it1=s.lower_bound(x);
			j=*it1;
		}
		j%=n;

		if (x-k+1>=0) {
			st.add(x-k+1,x,1);
		} else {
			st.add(0,x,1);
			st.add(x-k+1+n,n,1);
		}
		vector<int> v;
		while(1) {
			pi q;
			if (x-k+1>=0) {
				q=st.query(x-k+1,x);
			} else {
				auto q1=st.query(0,x);
				auto q2=st.query(x-k+1+n,n);
				q=st.merge(q1,q2);
			}
			if (q.f<k-1) break;
			if (q.s > j) {
				j+=n;
			}
			if (j-q.s>=k) {
				ok.insert(j%n);
			}
			j=q.s;
			s.insert(j);
			s.insert(j+n);
			s.insert(j+2*n);
			st.add(j,j+1,-1e9);
			v.pb(j);
		}
		if (!s.size()) break;
		for(auto&x:v) st.add(x,x+1,1e9);
		auto it2 = s.find(j+n);
		--it2;
		int t = *it2;
		if (j+n-t>=k) ok.insert(j);
	}

}

int compare_plants(int x, int y) {
	if (n<=300) {
		if (bs[x][y]) {
			return 1;
		}
		if (bs[y][x]) {
			return -1;
		}
		return 0;
	}
	if (k==2) {
		if (L[x]<=y && y<=R[x]) return 1;
		if (L[x]<=y+n && y+n<=R[x]) return 1;
		swap(x,y);
		if (L[x]<=y && y<=R[x]) return -1;
		if (L[x]<=y+n && y+n<=R[x]) return -1;
		return 0;
	}
	if (p[x]>p[y]) return 1;
	else return -1;
}

Compilation message

plants.cpp: In function 'void init(int, std::vector<int>)':
plants.cpp:161:19: warning: 'z' may be used uninitialized in this function [-Wmaybe-uninitialized]
  161 |  for (int l=z; l<z+n; ++l) {
      |                  ~^~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 8532 KB Output is correct
2 Correct 4 ms 8532 KB Output is correct
3 Correct 4 ms 8532 KB Output is correct
4 Correct 4 ms 8532 KB Output is correct
5 Correct 4 ms 8532 KB Output is correct
6 Correct 40 ms 11284 KB Output is correct
7 Correct 46 ms 11608 KB Output is correct
8 Correct 62 ms 13988 KB Output is correct
9 Correct 66 ms 14028 KB Output is correct
10 Correct 62 ms 14004 KB Output is correct
11 Correct 61 ms 14084 KB Output is correct
12 Correct 60 ms 13988 KB Output is correct
13 Correct 59 ms 14024 KB Output is correct
14 Correct 65 ms 14116 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 8532 KB Output is correct
2 Correct 4 ms 8532 KB Output is correct
3 Correct 4 ms 8532 KB Output is correct
4 Correct 3 ms 8532 KB Output is correct
5 Correct 4 ms 8532 KB Output is correct
6 Correct 7 ms 8660 KB Output is correct
7 Correct 54 ms 11528 KB Output is correct
8 Correct 5 ms 8672 KB Output is correct
9 Correct 7 ms 8660 KB Output is correct
10 Correct 54 ms 11460 KB Output is correct
11 Correct 48 ms 11332 KB Output is correct
12 Correct 50 ms 11892 KB Output is correct
13 Correct 53 ms 11460 KB Output is correct

Subtask #3
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 8532 KB Output is correct
2 Correct 4 ms 8532 KB Output is correct
3 Correct 4 ms 8532 KB Output is correct
4 Correct 3 ms 8532 KB Output is correct
5 Correct 4 ms 8532 KB Output is correct
6 Correct 7 ms 8660 KB Output is correct
7 Correct 54 ms 11528 KB Output is correct
8 Correct 5 ms 8672 KB Output is correct
9 Correct 7 ms 8660 KB Output is correct
10 Correct 54 ms 11460 KB Output is correct
11 Correct 48 ms 11332 KB Output is correct
12 Correct 50 ms 11892 KB Output is correct
13 Correct 53 ms 11460 KB Output is correct
14 Correct 98 ms 12400 KB Output is correct
15 Correct 713 ms 23020 KB Output is correct
16 Correct 97 ms 12388 KB Output is correct
17 Correct 707 ms 23004 KB Output is correct
18 Correct 473 ms 23012 KB Output is correct
19 Correct 599 ms 37104 KB Output is correct
20 Correct 693 ms 23020 KB Output is correct

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 8532 KB Output is correct
2 Correct 3 ms 8532 KB Output is correct
3 Correct 44 ms 11512 KB Output is correct
4 Correct 447 ms 32404 KB Output is correct
5 Correct 533 ms 25220 KB Output is correct
6 Correct 583 ms 23200 KB Output is correct
7 Correct 645 ms 22944 KB Output is correct
8 Correct 728 ms 23072 KB Output is correct
9 Correct 460 ms 23964 KB Output is correct
10 Correct 492 ms 26052 KB Output is correct
11 Correct 60 ms 13960 KB Output is correct
12 Correct 473 ms 51168 KB Output is correct
13 Correct 460 ms 22980 KB Output is correct

Subtask #5
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 8532 KB Output is correct
2 Correct 4 ms 8532 KB Output is correct
3 Correct 4 ms 8532 KB Output is correct
4 Correct 3 ms 8532 KB Output is correct
5 Correct 3 ms 8532 KB Output is correct
6 Correct 4 ms 8532 KB Output is correct
7 Correct 12 ms 9172 KB Output is correct
8 Correct 13 ms 9344 KB Output is correct
9 Correct 12 ms 9172 KB Output is correct
10 Correct 17 ms 9316 KB Output is correct
11 Correct 12 ms 9172 KB Output is correct
12 Correct 16 ms 9208 KB Output is correct
13 Correct 15 ms 9620 KB Output is correct

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 8532 KB Output is correct
2 Correct 4 ms 8532 KB Output is correct
3 Correct 3 ms 8532 KB Output is correct
4 Correct 4 ms 8532 KB Output is correct
5 Incorrect 6 ms 8532 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 8532 KB Output is correct
2 Correct 4 ms 8532 KB Output is correct
3 Correct 4 ms 8532 KB Output is correct
4 Correct 4 ms 8532 KB Output is correct
5 Correct 4 ms 8532 KB Output is correct
6 Correct 40 ms 11284 KB Output is correct
7 Correct 46 ms 11608 KB Output is correct
8 Correct 62 ms 13988 KB Output is correct
9 Correct 66 ms 14028 KB Output is correct
10 Correct 62 ms 14004 KB Output is correct
11 Correct 61 ms 14084 KB Output is correct
12 Correct 60 ms 13988 KB Output is correct
13 Correct 59 ms 14024 KB Output is correct
14 Correct 65 ms 14116 KB Output is correct
15 Correct 4 ms 8532 KB Output is correct
16 Correct 4 ms 8532 KB Output is correct
17 Correct 4 ms 8532 KB Output is correct
18 Correct 3 ms 8532 KB Output is correct
19 Correct 4 ms 8532 KB Output is correct
20 Correct 7 ms 8660 KB Output is correct
21 Correct 54 ms 11528 KB Output is correct
22 Correct 5 ms 8672 KB Output is correct
23 Correct 7 ms 8660 KB Output is correct
24 Correct 54 ms 11460 KB Output is correct
25 Correct 48 ms 11332 KB Output is correct
26 Correct 50 ms 11892 KB Output is correct
27 Correct 53 ms 11460 KB Output is correct
28 Correct 98 ms 12400 KB Output is correct
29 Correct 713 ms 23020 KB Output is correct
30 Correct 97 ms 12388 KB Output is correct
31 Correct 707 ms 23004 KB Output is correct
32 Correct 473 ms 23012 KB Output is correct
33 Correct 599 ms 37104 KB Output is correct
34 Correct 693 ms 23020 KB Output is correct
35 Correct 3 ms 8532 KB Output is correct
36 Correct 3 ms 8532 KB Output is correct
37 Correct 44 ms 11512 KB Output is correct
38 Correct 447 ms 32404 KB Output is correct
39 Correct 533 ms 25220 KB Output is correct
40 Correct 583 ms 23200 KB Output is correct
41 Correct 645 ms 22944 KB Output is correct
42 Correct 728 ms 23072 KB Output is correct
43 Correct 460 ms 23964 KB Output is correct
44 Correct 492 ms 26052 KB Output is correct
45 Correct 60 ms 13960 KB Output is correct
46 Correct 473 ms 51168 KB Output is correct
47 Correct 460 ms 22980 KB Output is correct
48 Correct 4 ms 8532 KB Output is correct
49 Correct 4 ms 8532 KB Output is correct
50 Correct 4 ms 8532 KB Output is correct
51 Correct 3 ms 8532 KB Output is correct
52 Correct 3 ms 8532 KB Output is correct
53 Correct 4 ms 8532 KB Output is correct
54 Correct 12 ms 9172 KB Output is correct
55 Correct 13 ms 9344 KB Output is correct
56 Correct 12 ms 9172 KB Output is correct
57 Correct 17 ms 9316 KB Output is correct
58 Correct 12 ms 9172 KB Output is correct
59 Correct 16 ms 9208 KB Output is correct
60 Correct 15 ms 9620 KB Output is correct
61 Incorrect 48 ms 13288 KB Output isn't correct
62 Halted 0 ms 0 KB -