제출 #114415

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
114415		popovicirobert	Aliens (IOI07_aliens)	C++14	0 / 100	2 ms	384 KiB

aliens

#include <bits/stdc++.h>
#define lsb(x) (x & (-x))
#define ll long long
#define ull unsigned long long
// 217
// 44

using namespace std;

int N, X0, Y0, M;

/*inline string in(int x, int y) {
    return ((x - X0) / M + (y - Y0) / M) % 2 == 0 ? "true" : "false";
}*/

inline bool ask(int x, int y) {

    //if(x < X0 || x >= X0 + 5 * M || y < Y0 || y >= Y0 + 5 * M) return 0;
    if(x > N || x <= 0 || y > N || y <= 0) return 0;

    cout << "examine ";
    cout << x << " " << y << "\n";
    string str;

    cin >> str;
    //str = in(x, y);

    return str == "true" ? 1 : 0;
}

inline void solve(int n, int x0, int y0) {

    int x1 = x0, y1 = y0;
    int step = 0;

    while(ask(x1 - (1 << step), y1)) {
        step++;
    }

    while(step > 0) {
        step--;
        if(ask(x1 - (1 << step), y1)) {
            x1 -= (1 << step);
        }
    }

    while(ask(x1, y1 - (1 << step))) {
        step++;
    }

    while(step > 0) {
        step--;
        if(ask(x1, y1 - (1 << step))) {
            y1 -= (1 << step);
        }
    }

    int x2 = x0, y2 = y0;

    while(ask(x2 + (1 << step), y2)) {
        step++;
    }

    while(step > 0) {
        step--;
        if(ask(x2 + (1 << step), y2)) {
            x2 += (1 << step);
        }
    }

    int m = x2 - x1 + 1;

    while(ask(x1 - 2 * m, y1)) {
        x1 -= 2 * m;
    }
    while(ask(x1, y1 - 2 * m)) {
        y1 -= 2 * m;
    }

    cout << "solution " << x1 - 1 + 2 * m + (m + 1) / 2 << " " << y1 - 1 + 2 * m + (m + 1) / 2 << "\n";

}

int main() {
    //ifstream cin("A.in");
    //ofstream cout("A.out");
    int x0, y0;
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);

    //cin >> N >> X0 >> Y0 >> M;
    cin >> N >> x0 >> y0;

    //int x0 = 7, y0 = 4;

    solve(N, x0, y0);



    //cin.close();
    //cout.close();
    return 0;
}

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