Submission #955328

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
955328	2024-03-30 06:43:41	Lithanium	Aliens (IOI07_aliens)	C++17	100 / 100	1 ms	508 KiB

aliens

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#include <bits/stdc++.h>
using namespace std;
 
#define int long long
 
bool use_device(signed a, signed b) {
  cout << "examine " << a << " " << b << endl;
    string res;
    cin >> res;
    return (res == "true");
}
 
pair<signed, signed> help_aliens(signed n, signed sx, signed sy) {
    int l, r, b;
    int low = sx, high = n;
    for (int i = 0; sx + (1 << i) <= n; i ++) {
        signed nx = sx + (1 << i);
        if (!use_device(nx, sy)) {
            high = nx;
            if (i != 0) {
                low = sx + (1 << (i-1));
            }
            break;
        }
    }
    while (high > low) {
        signed mid = (high + low + 1)/2;
        if (use_device(mid, sy)) low = mid;
        else high = mid - 1;
    }
 
 
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• 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