oj.uz

Submission #132600

# Submission time Handle Problem Language Result Execution time Memory
132600 2019-07-19T08:11:59 Z anayk Dojave (COCI17_dojave) C++14
140 / 140
 343 ms 29304 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()
    {
    	scanf("%d", &m);
    	n = (1 << m);
     
    	if(m == 1)
    	{
    		printf("%d", 2);
    		return 0;
    	}
     
    	for(int i = 0; i < n; i++)
    	{
    		scanf("%d", 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];
    	}
     
    	printf("%lld", answer);
     
    	return 0;
    }

Compilation message

dojave.cpp: In function 'int main()':
dojave.cpp:65:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
      scanf("%d", &m);
      ~~~~~^~~~~~~~~~
dojave.cpp:76:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d", seq + i);
       ~~~~~^~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 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 4 ms 508 KB Output is correct
2 Correct 3 ms 508 KB Output is correct

Subtask #5
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 760 KB Output is correct
2 Correct 5 ms 760 KB Output is correct
3 Correct 5 ms 760 KB Output is correct

Subtask #6
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 2168 KB Output is correct
2 Correct 12 ms 2168 KB Output is correct
3 Correct 31 ms 3960 KB Output is correct

Subtask #7
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 2168 KB Output is correct
2 Correct 24 ms 3960 KB Output is correct
3 Correct 56 ms 7528 KB Output is correct

Subtask #8
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 67 ms 7644 KB Output is correct
2 Correct 48 ms 7576 KB Output is correct
3 Correct 56 ms 7544 KB Output is correct

Subtask #9
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 327 ms 29152 KB Output is correct
2 Correct 287 ms 29196 KB Output is correct
3 Correct 236 ms 29180 KB Output is correct

Subtask #10
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 343 ms 29172 KB Output is correct
2 Correct 180 ms 29048 KB Output is correct
3 Correct 216 ms 29048 KB Output is correct
4 Correct 310 ms 29304 KB Output is correct