Submission #620627

#	Time	Username	Problem	Language	Result	Execution time	Memory
620627		KLPP	Comparing Plants (IOI20_plants)	C++14	0 / 100	4082 ms	4404 KiB

plants

#include "plants.h"
#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=a;i<b;i++)
typedef long long int lld;
#define trav(a,v) for(auto a:v)

int n;
int K;
int arr[1000000];
int order[1000000];
void init(int k, std::vector<int> r) {
	n=r.size();
	K=k;
	rep(i,0,n)arr[i]=r[i];
	if(2*k>n){
		rep(i,0,n)order[i]=-1;
		int cnt=0;
		rep(turn,0,n){
			rep(i,0,n){
				if(arr[i]==0 && order[i]==-1){
					order[i]=cnt;
					cnt++;
					rep(j,1,k){
						arr[(i-j+n)%n]--;
					}
				}
			}
		}
	}
	return;
}
int trial[1000000];
bool visited[1000000];
bool elim(int i, bool do_it){
	if(visited[i])return false;
	if(trial[i]>0)return false;
	visited[i]=true;
	bool rev=false;
	rep(j,1,K){
		if(!visited[(i-j)%n]){
			trial[(i-j+n)%n]--;
			if(trial[(i-j+n)%n]<0)rev=true;
		}
	}
	if(rev){
		rep(j,1,K){
			if(!visited[(i-j)%n]){
				trial[(i-j+n)%n]++;
			}
		}
		visited[i]=false;
		return false;
	}else{
		if(!do_it){
			rep(j,1,K){
			if(!visited[(i-j)%n]){
				trial[(i-j+n)%n]++;
			}
		}
		visited[i]=false;
		}
		return true;
	}
}
int compare_plants(int x, int y) {
	if(2*K>n){
		if(order[x]>order[y])return -1;
		return 1;
	}
	rep(i,0,n)trial[i]=arr[i];
	rep(i,0,n)visited[i]=false;
	rep(turn,0,n+1){
		rep(i,0,n){
			if(i!=x && i!=y){
				elim(i,true);
			}
		}
	}
	//rep(i,0,n)cout<<trial[i]<<" ";
	//cout<<endl;
	if(elim(x,false) && elim(y,false))return 0;
	if(elim(x,false))return 1;
	return -1;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 11
• Subtask 6: 0 / 15
• Subtask 7: 0 / 25