oj.uz

답안 #355077

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
355077 2021-01-22T08:47:42 Z ryansee 식물 비교 (IOI20_plants) C++14
14 / 100
 4000 ms 217036 KB 
#include "plants.h"
 
#include "bits/stdc++.h"
using namespace std;
 
#define FAST ios_base::sync_with_stdio(false); cin.tie(0);
#define pb push_back
#define eb emplace_back
#define ins insert
#define f first
#define s second
#define cbr cerr<<"hi\n"
#define mmst(x, v) memset((x), v, sizeof ((x)))
#define siz(x) ll(x.size())
#define all(x) (x).begin(), (x).end()
#define lbd(x,y) (lower_bound(all(x),y)-x.begin())
#define ubd(x,y) (upper_bound(all(x),y)-x.begin())
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());    //can be used by calling rng() or shuffle(A, A+n, rng)
inline long long rand(long long x, long long y) { return rng() % (y+1-x) + x; } //inclusivesss
string inline to_string(char c) {string s(1,c);return s;} template<typename T> inline T gcd(T a,T b){ return a==0?llabs(b):gcd(b%a,a); }
 
using ll=long long; 
using ld=long double;
#define FOR(i,s,e) for(ll i=s;i<=ll(e);++i)
#define DEC(i,s,e) for(ll i=s;i>=ll(e);--i)
using pi=pair<ll,ll>; using spi=pair<ll,pi>; using dpi=pair<pi,pi>; 
 
long long LLINF = 1e18;
int INF = 1e9+1e6;
#define MAXN (200002)
 
int n, start, k;
vector<int> R;
ll A[MAXN*2];
inline ll cy(ll x) {
	x %= n, x += n, x %= n; return x;
}
ll dist(int x,int y) {
	if(x > y) swap(x, y);
	return min(y-x, n-y+x);	
}

struct node {
	int s,e,m;
	spi v;
	ll lazy[3];
	node*l,*r;
	node(int S,int E){
		s=S,e=E,m=(s+e)>>1;
		v=spi(LLINF, pi(0, -1)), mmst(lazy, 0);
		if(s^e)l=new node(s,m),r=new node(m+1,e),v=min(l->v,r->v);
		else v=spi(R[s], pi(0, s));
	}
	void value() {
		v.f += lazy[0], v.s.f += lazy[1];
		if(s^e) FOR(i,0,1) l->lazy[i]+=lazy[i], r->lazy[i]+=lazy[i];
		lazy[0]=lazy[1]=0;
	}
	void update(int x,int y,pi nval) {
		if(s==x&&e==y) {
			if(nval.s <= 1) lazy[nval.s] += nval.f;
			else lazy[nval.s] = max(lazy[nval.s], nval.f);
			return;
		}
		if(x>m) r->update(x,y,nval);
		else if(y<=m) l->update(x,y,nval);
		else l->update(x,m,nval),r->update(m+1,y,nval);
		l->value(), r->value();
		v=min(l->v,r->v);
	}
	spi rmq(int x,int y) {
		value();
		if(s==x&&e==y) return v;
		if(x>m) return r->rmq(x,y);
		else if(y<=m) return l->rmq(x,y);
		else return min(l->rmq(x,m),r->rmq(m+1,y));
	}
	void set(int x,ll add=0) {
		value();
		add = max(add, lazy[2]);
		if(s==e) {
			A[s] = add;
			v = spi(LLINF, pi(0, -1));
			return;
		}
		if(x>m) r->set(x, add);
		else l->set(x, add);
		l->value(), r->value();
		v = min(l->v, r->v);
	}
} *seg;
void update(int x,int y,pi nval) {
	x=cy(x), y=cy(y);
	if(x<=y) seg->update(x,y,nval);
	else seg->update(x,n-1,nval), seg->update(0,y,nval);
}
spi rmq(int x,int y) {
	x=cy(x), y=cy(y);
	if(x<=y) return seg->rmq(x, y);
	else return min(seg->rmq(x, n-1), seg->rmq(0, y));
}
struct node2 {
	int s,e,m;
	array<pi, 2> v;
	node2*l,*r;
	node2(int S,int E){
		s=S,e=E,m=(s+e)>>1;
		v = {pi(INF, -1), pi(-INF, -1)};
		if(s^e)l=new node2(s,m),r=new node2(m+1,e);
	}
	array<pi, 2> comb(array<pi, 2> x,array<pi, 2> y) {
		return array<pi, 2> {min(x[0], y[0]), max(x[1], y[1])};
	}
	array<pi, 2> rmq(int x,int y) {
		if(s==x&&e==y) return v;
		if(x>m) return r->rmq(x, y);
		else if(y<=m) return l->rmq(x, y);
		else return comb(l->rmq(x, m), r->rmq(m+1, y));
	}
	ll mx(int x,int y) {
		if(x <= y) return rmq(x, y)[1].s;
		else assert(0);
	}
	ll mi(int x,int y) {
		if(x <= y) return rmq(x, y)[0].s;
		else assert(0);
	}
	void set(int x) {
		if(s==e) {
			v = {pi(A[s], s), pi(A[s], s)};
			return;
		}
		if(x>m) r->set(x);
		else l->set(x);
		v = comb(l->v, r->v);
	}
} *seg2;
struct tree {
	int st[MAXN*2], en[MAXN*2];
	bitset<MAXN*2> r;
	vector<int> v[MAXN*2];
	tree() {
		mmst(st, 0), mmst(en, 0), r.set();
	}
	void add(int x,int y) {
		if(y==-1||x==y) return;
		r[x]=0, v[y].eb(x);
	}
	void solve() {
		ll co=1;
		function<void(ll)>dfs=[&](int x) {
			st[x]=co++;
			for(auto i:v[x]) dfs(i);
			en[x]=co-1;
		};
		FOR(i,0,n-1) if(r[i]) dfs(i);
	}
	bool isp(int a,int b) { return st[a]<=st[b]&&en[a]>=en[b]; }
} t[2];
void init(int K, std::vector<int> r) { k=K, R=r;
	n=r.size();
	seg=new node(0, n-1);
	FOR(i,0,n-1) if(r[i]==0) update(i+1, i+k-1, pi(1, 1));
	while(1) {
		start = seg->rmq(0, n-1).s.s;
		if(start == -1) break;
		seg->set(start);
		update(start+1, start+k-1, pi(A[start]+1, 2));
		update(start+1, start+k-1, pi(-1, 1));
		update(start-k+1, start-1, pi(A[start]+1, 2));
		update(start-k+1, start-1, pi(-1, 0));
		vector<int> tmp;
		while(1) {
			spi x = rmq(start-k+1, start-1);
			if(x.f == 0) {
				tmp.eb(x.s.s);
				update(x.s.s+1, x.s.s+k-1, pi(1, 1));
				update(x.s.s, x.s.s, pi(1, 0));
			} else break;
		}
		for(auto i:tmp) update(i, i, pi(-1, 0));
	}
	/* dp[0][0]=dp[1][0]=1;
	FOR(i,0,1) fw[i].update(A[0], 1);
	FOR(i,1,n-1) {
		// FOR(jj,i-k+1,i-1) { int j=cy(jj);
			// assert(A[i] ^ A[j]);
			// if(A[i] < A[j]) dp[0][i] |= dp[0][j];
			// else dp[1][i] |= dp[1][j];
		// }
		if(i >= k) FOR(j,0,1) if(dp[j][i-k]) fw[j].update(A[i-k], -1);
		dp[0][i] = fw[0].sum(A[i]+1, MAXN-2) > 0;
		dp[1][i] = fw[1].sum(0, A[i]-1) > 0;
		FOR(j,0,1) if(dp[j][i]) fw[j].update(A[i], 1);
	}
	fw[0]=fen(), fw[1]=fen();
	dp2[0][0]=dp2[1][0]=1;
	FOR(i,0,1) fw[i].update(A[0], 1);
	DEC(ii,-1,-n+1) { int i=cy(ii);
		// FOR(jj,i+1,i+k-1) { int j=cy(jj);
			// assert(A[i] ^ A[j]);
			// if(A[i] < A[j]) dp2[0][i] |= dp2[0][j];
			// else dp2[1][i] |= dp2[1][j];
		// }
		int t = cy(i + k);
		if(t > i || t == 0) {
			FOR(j,0,1) if(dp2[j][t]) fw[j].update(A[t], -1);
		}
		dp2[0][i] = fw[0].sum(A[i]+1, MAXN-2) > 0;
		dp2[1][i] = fw[1].sum(0, A[i]-1) > 0;
		FOR(j,0,1) if(dp2[j][i]) fw[j].update(A[i], 1);
	} */
	
	vector<int> p;
	FOR(i,0,n-1) p.eb(i), p.eb(i+n), A[i+n]=A[i];
	sort(all(p), [](int x,int y){return A[x]<A[y];});
	seg2=new node2(0, 2*n-1);
	for(auto i:p) {
		int target = seg2->mx(i, min(2*n-1, i+k-1)); // connect to shortest tower within k that is taller than you
		t[0].add(i, target);
		seg2->set(i);
	}
	
	sort(all(p), [](int x,int y){return A[x]>A[y];});
	seg2=new node2(0, 2*n-1);
	for(auto i:p) {
		int target = seg2->mi(i, min(2*n-1, i+k-1));
		t[1].add(i, target);
		seg2->set(i);
	}
	// FOR(i,0,n-1) {
		// int target = seg2->mi(i, i-k+1);
		// t[2].add(i, target);
	// }
	// FOR(i,0,n-1) {
		// int target = seg2->mx(i, i-k+1);
		// t[3].add(i, target);
	// }
	FOR(i,0,1) t[i].solve();
}
int compare_plants(int x, int y) {
	/* if(x == 0) {
		if(dp[0][y] || dp2[0][y]) return -1;
		else if(dp[1][y] || dp2[1][y]) return 1;
		else return 0;
	}
	if(n > 300 || reach[x][y] || reach[y][x]) return A[x] < A[y] ? 1 : -1;
	else return 0; */
	
	if(dist(x, y) < k) {
		return A[x] < A[y] ? 1 : -1;
	}
	
	FOR(i,y,y+k-1) {
		if(A[y] <= A[i]) {
			if(t[0].isp(i, x)) { if(0) assert(A[i] < A[x]); return -1; }
		}
	}
	FOR(i,y,y+k-1) {
		if(A[y] >= A[i]) {
			if(t[1].isp(i, x)) { if(0) assert(A[x] < A[i]); return 1; }
		}
	}
	swap(x, y);
	y += n;
	FOR(i,y,min(2*n-1, y+k-1)) {
		if(A[y] <= A[i]) {
			if(t[0].isp(i, x)) { if(0) assert(A[i] < A[x]); return 1; }
		}
	}
	FOR(i,y,min(2*n-1, y+k-1)) {
		if(A[y] >= A[i]) {
			if(t[1].isp(i, x)) { if(0) assert(A[x] < A[i]); return -1; }
		}
	}
	
	return 0;
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 25452 KB Output is correct
2 Correct 17 ms 25452 KB Output is correct
3 Correct 17 ms 25452 KB Output is correct
4 Incorrect 18 ms 25452 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 16 ms 25452 KB Output is correct
2 Correct 18 ms 25452 KB Output is correct
3 Correct 16 ms 25452 KB Output is correct
4 Correct 17 ms 25452 KB Output is correct
5 Correct 18 ms 25580 KB Output is correct
6 Correct 27 ms 26476 KB Output is correct
7 Correct 139 ms 33132 KB Output is correct
8 Correct 20 ms 25580 KB Output is correct
9 Correct 26 ms 26476 KB Output is correct
10 Correct 130 ms 33004 KB Output is correct
11 Correct 110 ms 33132 KB Output is correct
12 Correct 115 ms 33388 KB Output is correct
13 Correct 128 ms 33132 KB Output is correct

Subtask #3
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 25452 KB Output is correct
2 Correct 18 ms 25452 KB Output is correct
3 Correct 16 ms 25452 KB Output is correct
4 Correct 17 ms 25452 KB Output is correct
5 Correct 18 ms 25580 KB Output is correct
6 Correct 27 ms 26476 KB Output is correct
7 Correct 139 ms 33132 KB Output is correct
8 Correct 20 ms 25580 KB Output is correct
9 Correct 26 ms 26476 KB Output is correct
10 Correct 130 ms 33004 KB Output is correct
11 Correct 110 ms 33132 KB Output is correct
12 Correct 115 ms 33388 KB Output is correct
13 Correct 128 ms 33132 KB Output is correct
14 Correct 371 ms 46852 KB Output is correct
15 Execution timed out 4104 ms 211908 KB Time limit exceeded
16 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 25452 KB Output is correct
2 Correct 17 ms 25452 KB Output is correct
3 Correct 105 ms 30196 KB Output is correct
4 Correct 1649 ms 214596 KB Output is correct
5 Incorrect 2342 ms 217036 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 25452 KB Output is correct
2 Correct 17 ms 25452 KB Output is correct
3 Incorrect 17 ms 25452 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 25452 KB Output is correct
2 Correct 17 ms 25452 KB Output is correct
3 Correct 19 ms 25580 KB Output is correct
4 Correct 20 ms 25452 KB Output is correct
5 Incorrect 26 ms 26476 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 25452 KB Output is correct
2 Correct 17 ms 25452 KB Output is correct
3 Correct 17 ms 25452 KB Output is correct
4 Incorrect 18 ms 25452 KB Output isn't correct
5 Halted 0 ms 0 KB -