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Submission #706279

# Submission time Handle Problem Language Result Execution time Memory
706279 2023-03-06T08:41:06 Z SamNguyen Hotter Colder (IOI10_hottercolder) C++14
50 / 100
 607 ms 8100 KB 
#include "grader.h"
#include <bits/stdc++.h>
using namespace std;

const int HOTTER = 1, COLDER = -1, SAME = 0;

template <class Func>
int FIND_SMALLEST(int l, int r, Func f) {
	int res = r + 1;
	while (l <= r) {
		int m = (l + r) >> 1;
		if (f(m)) res = m, r = m - 1;
		else l = m + 1;
	}
	return res;
}

template <class Func>
int FIND_LARGEST(int l, int r, Func f) {
	int res = l - 1;
	while (l <= r) {
		int m = (l + r) >> 1;
		if (f(m)) res = m, l = m + 1;
		else r = m - 1;
	}
	return res;
}

int findLeft(int N) {
	auto f = [&](int len) {
		Guess(1);
		return Guess(1 + 2 * len);
	};

	int l = 1, r = (N - 1) / 2; 
	while (l <= r) {
		int m = (l + r) >> 1;
		int val = f(m);
		if (val == SAME)
			return 1 + m;
		if (val == HOTTER)
			l = m + 1;
		else
			r = m - 1;
	}

	return 1;
}

int findRight(int N) {
	auto f = [&](int len) {
		Guess(N);
		return Guess(N - 2 * len);
	};
	
	int l = 1, r = (N - 1) / 2; 
	while (l <= r) {
		int m = (l + r) >> 1;
		int val = f(m);
		if (val == SAME)
			return N - m;
		if (val == HOTTER)
			l = m + 1;
		else
			r = m - 1;
	}

	return N;
}

int HC(int N) {
	Guess(1);
	int id = Guess(N);

	if (id == SAME)
		return (N + 1) / 2;
	if (id == HOTTER)
		return findRight(N);
	return findLeft(N);
}

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 1236 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 1236 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 19 ms 1196 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 607 ms 8100 KB Output isn't correct - alpha = 0.000000000000