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Submission #706274

# Submission time Handle Problem Language Result Execution time Memory
706274 2023-03-06T08:37:39 Z SamNguyen Hotter Colder (IOI10_hottercolder) C++14
0 / 100
 543 ms 8164 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 = 0, r = N / 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 = 0, r = N / 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 -1;
}

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
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 18 ms 1364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 20 ms 1360 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 19 ms 1308 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 543 ms 8164 KB Output isn't correct - alpha = 0.000000000000