Submission #146147

#	Time	Username	Problem	Language	Result	Execution time	Memory
146147		MvC	Worm Worries (BOI18_worm)	C++11	10 / 100	2 ms	460 KiB

worm

#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
#include<bits/stdc++.h>
//#include "boxes.h"
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=1e6+50;
const int mod=1e9+7;
using namespace std;
int n,m,k,q,viz[nmax];
int ask(int x)
{
	if(x==0 || x==n+1)return 0;
	if(viz[x])return viz[x];
	cout<<"? "<<x<<" "<<1<<" "<<1<<endl;
	cin>>viz[x];
	return viz[x];
}
void ans(int x,int y,int z)
{
	cout<<"! "<<x<<" "<<y<<" "<<z<<endl;
	exit(0);
}
void rec(int l,int r)
{
	srand(time(0));
	if(l==r)ans(l,1,1);
	int x,y,mid;
	if(q==1)
	{
		x=ask(l),y=ask(r);
		if(x>y)ans(l,1,1);
		else ans(r,1,1);
	}
	mid=(l+r)/2;
	x=ask(mid),y=ask(mid+1);
	q-=2;
	if(x>=y)
	{
		rec(l,mid);
	}
	else if(x<y)
	{
		rec(mid+1,r);
	}
}
int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n>>m>>k>>q;
	rec(1,n);
	return 0;
}

Compilation message (stderr)

worm.cpp:2:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("O3")
 
worm.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("unroll-loops")

• Subtask 1: 10 / 10
• Subtask 2: 0 / 22
• Subtask 3: 0 / 12
• Subtask 4: 0 / 19
• Subtask 5: 0 / 14
• Subtask 6: 0 / 23