제출 #586114

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
586114		Bench0310	Aliens (IOI07_aliens)	C++17	100 / 100	3 ms	320 KiB

aliens

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    ll n;
    cin >> n;
    auto q=[&](ll x,ll y)->bool
    {
        if(!(1<=x&&x<=n&&1<=y&&y<=n)) return 0;
        cout << "examine " << x << " " << y << endl;
        string s;
        cin >> s;
        return (s=="true");
    };
    auto bins=[&](ll x,ll y,ll kx,ll ky,ll bad)->int
    {
        ll l=0,r=bad;
        while(l<r-1)
        {
            ll m=(l+r)/2;
            if(q(x+kx*m,y+ky*m)) l=m;
            else r=m;
        }
        return l;
    };
    ll x,y;
    cin >> x >> y;
    ll p=1;
    while(q(x+p-1,y)) p*=2;
    ll rx=x+bins(x,y,1,0,min(n+1,x+p-1)-x);
    p=1;
    while(q(x-p+1,y)) p*=2;
    ll lx=x-bins(x,y,-1,0,x-max(ll(0),x-p+1));
    ll m=rx-lx+1;
    ll ly=y-bins(x,y,0,-1,y-max(ll(0),y-m));
    ll ry=ly+m-1;
    vector<string> s(5,string(5,'0'));
    for(int i=0;i<5;i++) for(int j=0;j<5;j++) if(((i+j)%2)==0) s[i][j]='1';
    auto one=[&](int r,int c)->bool{return (0<=r&&r<5&&0<=c&&c<5&&s[r][c]=='1');};
    vector<array<int,2>> queries;
    for(int i=0;i<5;i++) for(int j=0;j<5;j++) if(one(i,j)&&!(i==2&&j==2)) queries.push_back({i-2,j-2});
    map<vector<bool>,array<int,2>> pos;
    int sz=12;
    for(int i=0;i<5;i++)
    {
        for(int j=0;j<5;j++)
        {
            if(!one(i,j)) continue;
            vector<bool> v(sz,0);
            for(int k=0;k<sz;k++) v[k]=one(i+queries[k][0],j+queries[k][1]);
            pos[v]={2-i,2-j};
        }
    }
    vector<bool> v(sz,0);
    for(int k=0;k<sz;k++) v[k]=q(x+queries[k][0]*m,y+queries[k][1]*m);
    ll mx=(lx+rx)/2;
    ll my=(ly+ry)/2;
    auto [dx,dy]=pos[v];
    cout << "solution " << mx+m*dx << " " << my+m*dy << endl;
    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: 10 / 10
• Subtask 10: 10 / 10