Submission #1038424

#	Time	Username	Problem	Language	Result	Execution time	Memory
1038424		ArthuroWich	Aliens (IOI07_aliens)	C++17	100 / 100	2 ms	596 KiB

aliens

#include <bits/stdc++.h>
using namespace std;
#define int long long int
int n;
bool query(int x, int y) {
    if (x < 1 || y < 1 || x > n || y > n) {
        return 0;
    }
    cout << "examine " << x << " " << y << endl;
    string s;
    cin >> s;
    if (s == "true") {
        return 1;
    } else {
        return 0;
    }
}
void solve() {
    int x0, y0;
    cin >> n >> x0 >> y0;
    int x = x0, y = y0, lx = x0, ly = y0;
    for (int i = 0; i < 3; i++) {
        for (int j = 31; j >= 0; j--) {
            x = lx-(1LL<<j);
            y = ly;
            if (query(x, y)) {
                lx = x;
                ly = y;
            }
        }
    }
    for (int i = 0; i < 3; i++) {
        for (int j = 31; j >= 0; j--) {
            x = lx;
            y = ly-(1LL<<j);
            if (query(x, y)) {
                lx = x;
                ly = y;
            }
        }
    }
    for (int j = 31; j >= 0; j--) {
        x = lx-(1LL<<j);
        y = ly-(1LL<<j);
        if (query(x, y)) {
            lx = x;
            ly = y;
        }
    }
    int m = 0;
    x = lx;
    y = ly;
    for (int j = 31; j >= 0; j--) {
        if (query(x+(1<<j), y+(1<<j))) {
            m += (1<<j);
            x += (1<<j);
            y += (1<<j);
        }
    }
    cout << "solution " << lx+m/2 << " " << ly+m/2 << endl;
}
int32_t main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t;
    t = 1;
    while(t--) {
        solve();
    }
}

• 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