Submission #808858

#	Time	Username	Problem	Language	Result	Execution time	Memory
808858		Liudas	Aliens (IOI07_aliens)	C++17	100 / 100	3 ms	208 KiB

aliens

#include <iostream>

using namespace std;

int main()
{
    long long N, x, y;
    cin >> N >> x >> y;
    long long u = 0, l = 0, r = 0, d = 0;
    long long ar = 1, al = 1, au = 1, ad = 1;
    bool flat = true;
    while(ar && x + r + ar <= N){
        cout << "examine " << x + r + ar << " " << y << endl;
        string ans;
        cin >> ans;
        if(ans != "true"){
            flat = false;
            ar /= 2;
        }
        else if(flat){
            ar *= 2;
        }
        else{
            r += ar;
        }
        while(x + r + ar > N){
            flat = false;
            ar/=2;
        }
    }
    flat = true;
    while(al && x - l - al >= 1){
        cout << "examine " << x - l - al << " " << y << endl;
        string ans;
        cin >> ans;
        if(ans != "true"){
            flat = false;
            al/=2;
        }
        else if(flat){
            al *= 2;
        }
        else{
            l+= al;
        }
        while(x - l - al < 1){
            flat = false;
            al/=2;
        }
    }
    flat = true;
    while(au && y + u + au <= N){
        cout << "examine " << x << " " << y + u + au << endl;
        string ans;
        cin >> ans;
        if(ans != "true"){
            flat = false;
            au /= 2;
        }
        else if(flat){
            au *= 2;
        }
        else{
            u += au;
        }
        while(y + u + au > N){
            flat = false;
            au/=2;
        }
    }
    flat = true;
    while(ad && y - d - ad >= 1){
        cout << "examine " << x << " " << y - d - ad << endl;
        string ans;
        cin >> ans;
        if(ans != "true"){
            flat = false;
            ad /= 2;
        }
        else if(flat){
            ad *= 2;
        }
        else{
            d += ad;
        }
        while(y - d - ad < 1){
            flat = false;
            ad/=2;
        }
    }
    long long midx = (2 * x + r - l) / 2, midy = (2 * y + u - d) / 2;
    long long s = r + l + 1;
    long long cl = 0, cr = 0, cu = 0, cd = 0;
    flat = true;
    while(flat && midx + 2 * s * (cr + 1) <= N){
        cout << "examine " << midx + 2 * s * (cr + 1) << " " << midy  << endl;
        string ans;
        cin >> ans;
        if(ans != "true"){
            flat = false;
        }
        else{
            cr++ ;
        }
    }
    flat = true;
    while(flat && midx - 2 * s * (cl + 1) >= 1){
        cout << "examine " << midx - 2 * s * (cl + 1) << " " << midy  << endl;
        string ans;
        cin >> ans;
        if(ans != "true"){
            flat = false;
        }
        else{
            cl++ ;
        }
    }
    flat = true;
    while(flat && midy + 2 * s * (cu + 1) <= N){
        cout << "examine " << midx  << " " << midy + 2 * s * (cu + 1) << endl;
        string ans;
        cin >> ans;
        if(ans != "true"){
            flat = false;
        }
        else{
            cu++ ;
        }
    }
    flat = true;
    while(flat && midy - 2 * s * (cd + 1) >= 1){
        cout << "examine " << midx  << " " << midy - 2 * s * (cd + 1) << endl;
        string ans;
        cin >> ans;
        if(ans != "true"){
            flat = false;
        }
        else{
            cd++;
        }
    }
    if(cl + cr == 2){
        cout << "solution ";
        if(cl == cr){
            cout << midx << " ";
        }
        if(cl == 0){
            cout << midx + s * 2  << " ";
        }
        if(cl == 2){
            cout << midx - s * 2 << " ";
        }
        if(cu == cd){
            cout << midy << " ";
        }
        if(cd == 0){
            cout << midy + s * 2  << " ";
        }
        if(cd == 2){
            cout << midy - s * 2 << " ";
        }
        cout << endl;
    }
    else{
        cout << "solution ";
        if(cl == 0){
            cout << midx + s << " ";
        }
        if(cl == 1){
            cout << midx - s << " ";
        }
        if(cd == 0){
            cout << midy + s << " ";
        }
        if(cd == 1){
            cout << midy - s << " ";
        }
        cout << 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