Submission #900102

#	Time	Username	Problem	Language	Result	Execution time	Memory
900102		JakobZorz	Aliens (IOI07_aliens)	C++17	80 / 100	2 ms	500 KiB

aliens

#include<iostream>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
#include<limits.h>
#include<math.h>
#include<map>
#include<set>
#include<unordered_map>
#include<unordered_set>
#include<iomanip>
#include<cstring>
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
using namespace std;
//const int MOD=1e9+7;
//typedef pair<ll,ll>Point;
//typedef pair<ll,ll>Line;
//#define x first
//#define y second

bool arr[50][50];
 
 
int n;
bool query(int x,int y){
    if(x>=n||y>=n||x<0||y<0)
        return false;
    cout<<"examine "<<x+1<<" "<<y+1<<endl;
    string res;
    cin>>res;
    return res=="true";
}
 
/*bool query(int x,int y){
    cout<<"\n";
    for(int y1=0;y1<n;y1++){
        for(int x1=0;x1<n;x1++){
            if(x==x1&&y==y1){
                cout<<"X";
            }else{
                cout<<(arr[x1][y1]?'#':'.');
            }
        }
        cout<<"\n";
    }
    
    if(x>=n||y>=n||x<0||y<0)
        return false;
    return arr[x][y]==1;
}*/
 
void solve(){
//    50 5
//    31 38
//    38 32
    
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);
    int x=31,y=37;
    /*n=50;
    for(int x=25;x<50;x++)
        for(int y=17;y<42;y++){
            if(((x)/5+(y-2)/5)%2==0)
                arr[x][y]=1;
        }
    
    for(int y=0;y<n;y++){
        for(int x=0;x<n;x++){
            cout<<(arr[x][y]?'#':'.');
        }
        cout<<"\n";
    }*/
    cin>>n>>x>>y;
    x--;y--;
    //query(x,y);
    
    {
        int l=x,r=x+1;
        while(query(r,y)){
            r=l+(r-l)*2;
        }
        
        while(l<r-1){
            int m=(l+r)/2;
            if(query(m,y)){
                l=m;
            }else{
                r=m;
            }
        }
        x=l;
    }
    
    {
        int l=y,r=y+1;
        while(query(x,r)){
            r=l+(r-l)*2;
        }
        
        while(l<r-1){
            int m=(l+r)/2;
            if(query(x,m)){
                l=m;
            }else{
                r=m;
            }
        }
        y=l;
    }
    
    int size=0;
    {
        int l=x-1,r=x;
        while(query(l,y)){
            l=r-(r-l)*2;
        }
        
        while(l<r-1){
            int m=(l+r)/2;
            if(query(m,y)){
                r=m;
            }else{
                l=m;
            }
        }
        
        size=x-l;
    }
    
    while(query(x+2*size,y))
        x+=size*2;
    
    while(query(x,y+2*size))
        y+=size*2;
    
    if(query(x+size,y+size)){
        x+=size;
        y+=size;
    }
    
    int offset=2*size+size/2;
    //query(x-offset,y-offset);
    cout<<"solution "<<x-offset+1<<" "<<y-offset+1<<"\n";
}

int main(){
    ios::sync_with_stdio(false);cout.tie(NULL);cin.tie(NULL);
    //freopen("bank.in","r",stdin);freopen("bank.out","w",stdout);
    int t=1;//cin>>t;
    while(t--)solve();
    return 0;
}

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