Submission #599122

#	Time	Username	Problem	Language	Result	Execution time	Memory
599122		pakhomovee	The Big Prize (IOI17_prize)	C++17	20 / 100	27 ms	296 KiB

prize

#include "prize.h"
#include <vector>

int find_best(int n) {
    int pr = 0;
    for (int i = 0; i < 400; ++i) {
        int l = pr, r = n;
        while (l + 1 < r) {
            int m = (l + r) / 2;
            if (ask(m)[0]) {
                r = m;
            } else {
                l = m;
            }
        }
        std::vector<int> arr = ask(l);
        if (arr[0] == arr[1] && arr[0] == 0) {
            return l;
        }
        pr = l + 1;
    }
    return -1;
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 80