oj.uz

Submission #303420

# Submission time Handle Problem Language Result Execution time Memory
303420 2020-09-20T09:57:19 Z Utaha Comparing Plants (IOI20_plants) C++14
0 / 100
 53 ms 5368 KB 
#include "plants.h"
#include<bits/stdc++.h>
using namespace std;
const int maxn = 305;
#define REP(i,n) for(int i=0;i<(n);i++)
#define eb emplace_back
#define pb push_back
#define SZ(a) ((int)a.size())
#define ALL(a) a.begin(),a.end()
const int INF = 0x3f3f3f3f;
int n,k;
bool adj[maxn][maxn];

set<int> zero;
set<int> st;

vector<int> a;
vector<int> _a;
vector<int> b;

int seg[maxn*4]; // store the minimum
int tg[maxn*4];

void push(int i){
	seg[i*2]+=tg[i];
	tg[i*2]+=tg[i];
	seg[i*2+1]+=tg[i];
	tg[i*2+1]+=tg[i];
	tg[i]=0;
}

void mdf(int i,int l,int r,int ql,int qr, int delta){
	if(l>=qr||ql>=r) return;
	if(ql<=l&&r<=qr){
		seg[i]+=delta;
		tg[i]+=delta;
		return;
	}
	int mid=(l+r)/2;
	push(i);
	mdf(i*2,l,mid,ql,qr,delta);
	mdf(i*2+1,mid,r,ql,qr,delta);
	seg[i] = min(seg[i*2],seg[i*2+1]);
}

void reset(int i,int l,int r){
	seg[i]=tg[i]=0;
	if(l!=r-1){
		int mid=(l+r)/2;
		reset(i*2,l,mid);
		reset(i*2+1,mid,r);
	}
}

int get_idx(int i,int l,int r){
	if(l==r-1) return l;
	int mid=(l+r)/2;
	push(i);
	if(seg[i*2]==seg[i]) return get_idx(i*2,l,mid);
	else return get_idx(i*2+1,mid,r);
}

void add(int i){ // adding i to zero while maintaining st
	if(zero.count(i))return;
	// cout<<"adding: "<<i<<endl;

	auto it = zero.lower_bound(i);

	if(SZ(zero)==0){
		zero.insert(i);
	}
	else if(it==zero.end()){
		int pre = *prev(zero.end());
		if(i-pre>=k) st.insert(i);
	}
	else if(it==zero.begin()){
		if((*it) - i >=k){
			st.insert((*zero.begin()));
		}
	}
	else{
		int pre = *prev(it);
		int nxt = *it;

		if(nxt-pre>=k){
			st.erase(nxt);
		}

		if(i-pre>=k) st.insert(i);
		if(nxt - i >=k){
			st.insert(nxt);
		}
	}
	zero.insert(i);
}

void rm(int i){ // removing i to zero while maintaining st
	if(!zero.count(i)) return;
	// cout<<"removing: "<<i<<endl;
	zero.erase(i);
	auto it = zero.lower_bound(i);

	if(it==zero.end()){
		st.erase(i);
	}
	else if(it==zero.begin()){
		st.erase(*it);
	}
	else{
		int pre = *prev(it);
		int nxt = *it;

		if(i-pre>=k) st.erase(i);
		if(nxt - i >=k){
			st.erase(nxt);
		}

		if(nxt-pre>=k){
			st.insert(nxt);
		}

	}

}

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

	{
		zero.clear();
		st.clear();
		vector<int> r = _r;
		REP(j,n){
			if(r[j]==0) zero.insert(j),zero.insert(j+n);
		}
		{
			int pre = -1;
			for(int i:zero){
				if(pre!=-1&&i-pre>=k){
					st.insert(i);
				}
				pre = i;
			}
		}

		REP(i,n){
			mdf(1,0,n,i,i+1,(r[i])?r[i]:INF);
		}

		REP(i,n){
			int tmp = *st.begin();
			tmp%=n;
			// cout<<"found: "<<tmp<<endl;
			a.pb(tmp);
			st.erase(tmp);
			st.erase(tmp+n);
			rm(tmp);
			rm(tmp+n);

			int l = (tmp-(k-1)+n)%n, r = tmp;
			if(l<r){
				mdf(1,0,n,l,r,-1);
			}
			else{
				mdf(1,0,n,l,n,-1);
				mdf(1,0,n,0,r,-1);
			}

			while(seg[1] == 0){
				int cur = get_idx(1,0,n);
				// cout<<"new: "<<cur<<endl;
				add(cur);
				add(cur+n);
				mdf(1,0,n,cur,cur+1,INF);
			}
			// cout<<"zero: ";
			// for(int j:zero) cout<<j<<' ';
			// cout<<'\n';
			// cout<<"st: ";
			// for(int j:st) cout<<j<<' ';
			// cout<<'\n';
		}

		// REP(i,n) cout<<a[i]<<" \n"[i==n-1];
		// cout<<endl;
	}

	{
		reset(1,0,n);
		zero.clear();
		st.clear();
		vector<int> r = _r;
		REP(i,n) r[i] = (k-1-r[i]);
		// REP(i,n) cout<<r[i]<<" \n"[i==n-1];
		REP(j,n){
			if(r[j]==0) zero.insert(j),zero.insert(j+n);
		}
		{
			int pre = -1;
			for(int i:zero){
				if(pre!=-1&&i-pre>=k){
					st.insert(i);
				}
				pre = i;
			}
		}

		REP(i,n){
			mdf(1,0,n,i,i+1,(r[i])?r[i]:INF);
		}

		REP(i,n){
			int tmp = *st.begin();
			tmp%=n;
			// cout<<"found: "<<tmp<<endl;
			b.pb(tmp);
			st.erase(tmp);
			st.erase(tmp+n);
			rm(tmp);
			rm(tmp+n);

			int l = (tmp-(k-1)+n)%n, r = tmp;
			if(l<r){
				mdf(1,0,n,l,r,-1);
			}
			else{
				mdf(1,0,n,l,n,-1);
				mdf(1,0,n,0,r,-1);
			}

			while(seg[1] == 0){
				int cur = get_idx(1,0,n);
				// cout<<"new: "<<cur<<endl;
				add(cur);
				add(cur+n);
				mdf(1,0,n,cur,cur+1,INF);
			}
			// cout<<"zero: ";
			// for(int j:zero) cout<<j<<' ';
			// cout<<'\n';
			// cout<<"st: ";
			// for(int j:st) cout<<j<<' ';
			// cout<<'\n';
		}

		// REP(i,n) cout<<b[i]<<" \n"[i==n-1];
	}

	// {
	// 	bool vis[maxn]={0};
	// 	for(int i:a){
	// 		for(int j=i+1;j<i+k;j++){
	// 			// cout<<i<<' '<<j<<endl;
	// 			int t = j%n;
	// 			if(!vis[t]){
	// 				adj[i][t]=1;
	// 			}
	// 		}
	// 		vis[i]=1;
	// 	}
	// }
	// {
	// 	bool vis[maxn]={0};
	// 	for(int i:b){
	// 		for(int j=i+1;j<i+k;j++){
	// 			int t = j%n;
	// 			if(!vis[t]){
	// 				adj[t][i]=1;
	// 			}
	// 		}
	// 		vis[i]=1;
	// 	}
	// }
	_a.resize(n);
	REP(i,n){
		_a[a[i]]=i;
	}
	// REP(i,n) REP(j,n) cout<<adj[i][j]<<" \n"[j==n-1];

	// REP(j,n) REP(i,n) REP(k,n){
	// 	if(adj[i][j]&&adj[j][k]) adj[i][k] = 1;
	// }

	return;
}


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

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 288 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Incorrect 0 ms 256 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Runtime error 2 ms 640 KB Execution killed with signal 11
7 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Runtime error 2 ms 640 KB Execution killed with signal 11
7 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Runtime error 53 ms 5368 KB Execution killed with signal 11
4 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Incorrect 1 ms 256 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Incorrect 0 ms 256 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 288 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Incorrect 0 ms 256 KB Output isn't correct
5 Halted 0 ms 0 KB -