Submission #59531

#	Time	Username	Problem	Language	Result	Execution time	Memory
59531		aquablitz11	Hotter Colder (IOI10_hottercolder)	C++14	79 / 100	1191 ms	8312 KiB

hottercolder

#include <cassert>
#include <random>
#include "grader.h"
using namespace std;

mt19937 rd(31415926);
uniform_int_distribution<int> dis(0, 1);

int HC(int n)
{
    int l = 1;
    int r = n;
    int p = 0;
    while (l < r) {
        if (p != l && p != r) {
            if (dis(rd) == 0) {
                Guess(l);
                p = l;
            } else {
                Guess(r);
                p = r;
            }
        }
        int z = r-l+1;
        int m = (l+r)/2;
        if (p == l) {
            int res = Guess(r);
            p = r;
            if (z%2 == 0) {
                if (res == 1) l = m+1;
                else if (res == -1) r = m;
                else assert(false);
            } else {
                if (res == 1) l = m+1;
                else if (res == -1) r = m-1;
                else l = r = m;
            }
        } else {
            int res = Guess(l);
            p = l;
            if (z%2 == 0) {
                if (res == 1) r = m;
                else if (res == -1) l = m+1;
                else assert(false);
            } else {
                if (res == 1) r = m-1;
                else if (res == -1) l = m+1;
                else l = r = m;
            }
        }
    }

    return l;
}

• Subtask 1: 25 / 25
• Subtask 2: 25 / 25
• Subtask 3: 25 / 25
• Subtask 4: 4 / 25