Submission #116062

#	Time	Username	Problem	Language	Result	Execution time	Memory
116062		someone_aa	Hotter Colder (IOI10_hottercolder)	C++17	50 / 100	8080 ms	110608 KiB

hottercolder

#include "grader.h"
#include <bits/stdc++.h>
using namespace std;


int HC(int N){
    mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

    int l = 1, r = N;

    int lst = 1;
    Guess(lst);

    for(int i=0;i<30;i++) {
        if(l == r) return l;

        int curr = (l + r) / 2;
        if(curr == lst) {
            while(curr == lst) {
                curr = uniform_int_distribution<int>(l, r)(rng);
            }
        }
        int q = Guess(curr);

        //cout<<i<<" - Previous was: "<<lst<<"\n";
        //cout<<l<<", "<<r<<" - "<<curr<<" --> "<<q<<"\n";

        if(curr < lst) {
            if(q == -1) {
                int sz = (lst - curr + 1) / 2;
                int cl = lst - sz + 1;
                int cr = N;

                l = max(l,cl);
                r = min(r,cr);
            }
            else if(q == 0) {
                int mid = (lst + curr) / 2;
                return mid;
            }
            else {
                int sz = (lst - curr + 1) / 2;
                int cl = 1;
                int cr = curr + sz - 1;

                l = max(l,cl);
                r = min(r,cr);
            }
        }
        else if(curr > lst) {
            if(q == -1) {
                int sz = (curr - lst + 1) / 2;
                int cl = 1;
                int cr = lst + sz - 1;

                l = max(l,cl);
                r = min(r,cr);
            }
            else if(q == 0) {
                int mid = (lst + curr) / 2;
                return mid;
            }
            else {
                int sz = (curr - lst + 1) / 2;
                int cl = curr - sz + 1;
                int cr = N;

                l = max(l,cl);
                r = min(r,cr);
            }
        }
        lst = curr;
    }

    return 1;
}

• Subtask 1: 25 / 25
• Subtask 2: 25 / 25
• Subtask 3: 0 / 25
• Subtask 4: 0 / 25