Submission #1011092

#	Time	Username	Problem	Language	Result	Execution time	Memory
1011092		ivaziva	Aliens (IOI07_aliens)	C++14	100 / 100	1 ms	344 KiB

aliens

#include <bits/stdc++.h>

using namespace std;

int main()
{
    string rez;
    long long st2[30];st2[0]=1;
    for (long long i=1;i<30;i++) st2[i]=st2[i-1]*2;
    long long n,x0,y0;
    cin>>n>>x0>>y0;
    long long eksponentdesno=0;
    for (long long i=0;i<30;i++)
    {
        if (x0+st2[i]>n) break;
        cout<<"examine "<<x0+st2[i]<<" "<<y0<<endl;
        fflush(stdout);cin>>rez;
        if (rez=="true") eksponentdesno=st2[i];
        else break;
    }
    long long ldesno=x0+eksponentdesno;
    long long rdesno=min(x0+2*eksponentdesno,n);
    long long rezdesno=x0;
    while (ldesno<=rdesno)
    {
        long long mid=(ldesno+rdesno)/2;
        cout<<"examine "<<mid<<" "<<y0<<endl;
        fflush(stdout);cin>>rez;
        if (rez=="true") {rezdesno=mid;ldesno=mid+1;}
        else rdesno=mid-1;
    }
    long long eksponentlevo=0;
    for (long long i=0;i<30;i++)
    {
        if (x0-st2[i]<=0) break;
        cout<<"examine "<<x0-st2[i]<<" "<<y0<<endl;
        fflush(stdout);cin>>rez;
        if (rez=="true") eksponentlevo=st2[i];
        else break;
    }
    long long llevo=max(x0-2*eksponentlevo,(long long)1);
    long long rlevo=x0-eksponentlevo;
    long long rezlevo=x0;
    while (llevo<=rlevo)
    {
        long long mid=(llevo+rlevo)/2;
        cout<<"examine "<<mid<<" "<<y0<<endl;
        fflush(stdout);cin>>rez;
        if (rez=="true") {rezlevo=mid;rlevo=mid-1;}
        else llevo=mid+1;
    }
    long long m=rezdesno-rezlevo+1;
    long long lgore=max(y0-m,(long long)1);
    long long rgore=y0;
    long long rezgore=y0;
    while (lgore<=rgore)
    {
        long long mid=(lgore+rgore)/2;
        cout<<"examine "<<x0<<" "<<mid<<endl;
        fflush(stdout);cin>>rez;
        if (rez=="true") {rezgore=mid;rgore=mid-1;}
        else lgore=mid+1;
    }
    long long rezdole=rezgore+m-1;
    long long centarx=(rezlevo+rezdesno)/2;
    long long centary=(rezgore+rezdole)/2;
    vector<pair<long long,long long>> ans;
    for (long long i=-4;i<=4;i++)
    {
        for (long long j=-4;j<=4;j++)
        {
            long long pozx=centarx+i*m;
            long long pozy=centary+j*m;
            if (pozx<1 or pozx>n) continue;
            if (pozy<1 or pozy>n) continue;
            cout<<"examine "<<pozx<<" "<<pozy<<endl;fflush(stdout);cin>>rez;
            if (rez=="true") ans.push_back({pozx,pozy});
        }
    }
    sort(ans.begin(),ans.end());
    cout<<"solution "<<ans[6].first<<" "<<ans[6].second<<endl;fflush(stdout);
}

• 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