Submission #880452

#	Time	Username	Problem	Language	Result	Execution time	Memory
880452		8pete8	Aliens (IOI07_aliens)	C++14	60 / 100	1 ms	596 KiB

aliens

#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric>
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define endl "\n"
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-lopps")
#define int long long
using namespace std;
const int mod=1e9+7,mxn=2e5+5,lg=30,inf=1e18,minf=-1e18;
int m,n;
bool ask(int x,int y){
	
	if(x<=0||y<=0||y>n||x>n)return false;
	cout<<"examine "<<x<<" "<<y<<'\n'<<flush;
	/*
	if(y>=1&&y<=3&&x>=2&&x<=4)return true;
	if(y>=7&&y<=9&&x>=2&&x<=4)return true;
	if(y>=13&&y<=15&&x>=2&&x<=4)return true;
	return false;
	*/
	string s;cin>>s;
	return s=="true";
}
pii getcen(){
	int x,y;cin>>n>>x>>y;
	int up=minf,down=inf,right=minf;
	int l,r,mid,nm,cx,cy;
	bool check=false;
	l=y,r=n;
	while(l<=r){
		check=false;
		mid=(l+r)/2;
		if(mid-y<=3)check=ask(x,mid);
		else{
			nm=(y+mid)/2;
			check=(ask(x,mid)&&ask(x,nm)&&ask(x,(y+nm)/2));
		}
		if(check)l=mid+1,up=max(up,mid);
		else r=mid-1;
	}
	l=1,r=y;
	while(l<=r){
		check=false;
		mid=(l+r)/2;
		if(y-mid<=3)check=ask(x,mid);
		else{
			nm=(y+mid)/2;
			check=(ask(x,mid)&&ask(x,nm)&&ask(x,(y+nm)/2));
		}
		if(check)r=mid-1,down=min(down,mid);
		else l=mid+1;
	}
	m=up-down+1;
	cy=(up+down)/2;
	l=x,r=n;
	while(l<=r){
		check=false;
		mid=(l+r)/2;
		if(mid-x<=3)check=ask(mid,y);
		else{
			nm=(x+mid)/2;
			check=(ask(mid,y)&&ask(nm,y)&&ask((x+nm)/2,y));
		}
		if(check)l=mid+1,right=max(right,mid);
		else r=mid-1;
	}
	cx=(right+(right-m+1))/2;
	return {cx,cy};
}
void solve(){
	pii pos=getcen();
	int cl=0,cr=0,cx=pos.f,cy=pos.s;
	while(ask(cx+2*m,cy))cx+=2*m,cr++;
	cy=pos.s;
	while(ask(cx-2*m,cy))cx-=2*m,cl++;
	while(ask(cx,cy-2*m))cy-=2*m;
	if(cl+cr+1==2)cout<<"solution "<<cx+m<<" "<<cy+m<<'\n'<<flush;
	else cout<<"solution "<<cx+2*m<<" "<<cy+2*m<<'\n'<<flush;
	return;
}
int32_t main(){
    fastio
	solve();
	return 0;
}

Compilation message (stderr)

aliens.cpp:31:40: warning: bad option '-funroll-lopps' to pragma 'optimize' [-Wpragmas]
   31 | #pragma GCC optimize ("03,unroll-lopps")
      |                                        ^
aliens.cpp:36:21: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   36 | bool ask(int x,int y){
      |                     ^
aliens.cpp:49:12: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   49 | pii getcen(){
      |            ^
aliens.cpp:95:12: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   95 | void solve(){
      |            ^
aliens.cpp:106:14: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
  106 | int32_t main(){
      |              ^

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 0 / 10
• Subtask 9: 10 / 10
• Subtask 10: 0 / 10