oj.uz

Submission #132356

# Submission time Handle Problem Language Result Execution time Memory
132356 2019-07-18T18:13:24 Z anayk Dojave (COCI17_dojave) C++14
140 / 140
 291 ms 36256 KB 
#include <iostream>

#define MAXN 2000000

int m, n;
int first[MAXN];
int other[MAXN];
int seq[MAXN];
long long dp[2][MAXN];
int min, max;
int a, b;

void add(int x)
{
	min = std::min(x, min);
	max = std::max(x, max);
}

void solve(int l, int r)
{
	int m = (l+r)/2;

	a = m;
	b = m+1;

	min = a;
	max = b;

	add(other[seq[a]]);
	add(other[seq[b]]);

	while(true)
	{
		if(a > min)
		{
			if(a == l)
				break;

			a--;
			add(other[seq[a]]);
		}
		else if(b < max)
		{
			if(b == r)
				break;

			b++;
			add(other[seq[b]]);
		}
		else
		{
			first[a] = std::min(first[a], b);

			if(a == l)
				break;

			a--;
			add(other[seq[a]]);
		}
	}
}

int main()
{
	std::ios::sync_with_stdio(false);

	std::cin >> m;
	n = (1 << m);

	if(m == 1)
	{
		std::cout << 2 << std::endl;
		return 0;
	}

	for(int i = 0; i < n; i++)
	{
		std::cin >> seq[i];
		first[i] = MAXN;
		other[seq[i]^(n-1)] = i;
	}

	int c = 2;
	while(c <= n)
	{
		for(int i = 0; i < n; i+=c)
			solve(i, i+c-1);
		c *= 2;
	}

	long long answer = n;
	answer *= (answer-1);
	answer /= 2;
	answer += (long long) n;

	dp[0][n] = dp[1][n] = 0;

	for(int i = n-1; i >= 0; i--)
	{
		dp[0][i] = dp[1][i] = 0;
		
		if(first[i] == MAXN)
			continue;

		int c = first[i]-i+1;
		if(c%4)
		{
			dp[1][i] = 1;
			dp[1][i] += dp[0][first[i]+1];
			dp[0][i] += dp[1][first[i]+1];
		}
		else
		{
			dp[0][i] = 1;
			dp[1][i] += dp[1][first[i]+1];
			dp[0][i] += dp[0][first[i]+1];
		}

		answer -= dp[0][i];
	}

	std::cout << answer << std::endl;

	return 0;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 380 KB Output is correct
3 Correct 2 ms 376 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 504 KB Output is correct
2 Correct 3 ms 504 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 656 KB Output is correct
2 Correct 3 ms 632 KB Output is correct

Subtask #5
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 888 KB Output is correct
2 Correct 5 ms 888 KB Output is correct
3 Correct 5 ms 888 KB Output is correct

Subtask #6
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 2300 KB Output is correct
2 Correct 12 ms 2360 KB Output is correct
3 Correct 27 ms 4276 KB Output is correct

Subtask #7
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 2352 KB Output is correct
2 Correct 24 ms 4216 KB Output is correct
3 Correct 54 ms 9208 KB Output is correct

Subtask #8
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 68 ms 7768 KB Output is correct
2 Correct 44 ms 7752 KB Output is correct
3 Correct 55 ms 9180 KB Output is correct

Subtask #9
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 291 ms 29284 KB Output is correct
2 Correct 244 ms 29304 KB Output is correct
3 Correct 187 ms 29376 KB Output is correct

Subtask #10
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 266 ms 29236 KB Output is correct
2 Correct 171 ms 29288 KB Output is correct
3 Correct 203 ms 36256 KB Output is correct
4 Correct 264 ms 36216 KB Output is correct