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Submission #59531

# Submission time Handle Problem Language Result Execution time Memory
59531 2018-07-22T09:09:40 Z aquablitz11 Hotter Colder (IOI10_hottercolder) C++14
79 / 100
 1191 ms 8312 KB 
#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
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 1272 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 1272 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 1272 KB Output is correct

Subtask #4
4.0 / 25.0

# Verdict Execution time Memory Grader output
1 Partially correct 1191 ms 8312 KB Output is partially correct - alpha = 0.142857142857