Submission #945578

#	Time	Username	Problem	Language	Result	Execution time	Memory
945578		vjudge1	Cave (IOI13_cave)	C++17	100 / 100	298 ms	1108 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>

#pragma optimize("Ofast")
#pragma target("avx2")

using namespace std;

#define ll long long
#define ld long double
#define pb push_back
#define pf push_front
#define pii pair<int,int>
#define all(v) v.begin(),v.end()
#define F first
#define S second
#define mem(a,i) memset(a,i,sizeof(a))
#define sz(s) (int)s.size()
#define y1 yy
#define ppb pop_back
#define lb lower_bound
#define ub upper_bound
#define gcd(a,b) __gcd(a,b)
#define in insert
// #define int ll

const int MAX=5000+15;
const int N=104;
const ll inf=1e18;  
const int mod=1e9+7;
const int mod1=1e9+9;
const ld eps=1e-9;

int dx[8]={1,0,-1,0,1,-1,-1,1};
int dy[8]={0,1,0,-1,1,-1,1,-1};

int binpow(int a,int n){
  if(!n)return 1;
  if(n%2==1)return a*binpow(a,n-1)%mod;
  int k=binpow(a,n/2);
  return k*k%mod;
}

int s[MAX],d[MAX];
int pos[MAX];

void exploreCave(int N) {
	mem(pos,-1);
	for(int i=0;i<N;i++){
		vector<int> vec;
		for(int j=0;j<N;j++){
			if(pos[j]==-1){
				vec.pb(j);
			}
		}
		int l=0,r=sz(vec)-1;
		for(int j=0;j<N;j++){
			if(pos[j]==-1){
				s[j]=0;
			}
		}
		int x=tryCombination(s);
		bool ok;
		if(x==-1||x>i)ok=0;
		else ok=1;
		while(l<r){
			int m=(l+r)/2;
			for(int j=0;j<=m;j++){
				s[vec[j]]=ok;
			}
			for(int j=m+1;j<sz(vec);j++)s[vec[j]]=ok^1;
			int x=tryCombination(s);
			if(x==-1||x>i){
				r=m;
			}
			else{
				l=m+1;
			}
		}
		pos[vec[l]]=1;
		s[vec[l]]=ok;
		d[vec[l]]=i;
	}
	answer(s,d);
}

Compilation message (stderr)

cave.cpp:4: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    4 | #pragma optimize("Ofast")
      | 
cave.cpp:5: warning: ignoring '#pragma target ' [-Wunknown-pragmas]
    5 | #pragma target("avx2")
      |

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24