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Submission #1076541

# Submission time Handle Problem Language Result Execution time Memory
1076541 2024-08-26T14:37:17 Z surgutti Brperm (RMI20_brperm) C++14
100 / 100
 264 ms 172220 KB 
#include "brperm.h"

typedef long long LL;

const LL mod = 1e9 + 696969;
const LL base = 2137;

const int L = 20;
const int N = 1 << L;

int n;
LL pw[N + 1], h1[L][N], h2[L][N];

void init(int _n, const char s[]) {
	n = _n;
	pw[0] = 1;
	for (int i = 1; i <= N; i++)
		pw[i] = pw[i - 1] * base % mod;
	
	for (int h = 0; h < L; h++)
		for (int i = n - 1; i >= 0; i--)
			h1[h][i] = (s[i] + h1[h][i + 1] * pw[1 << h]) % mod;

	for (int i = 0; i < n; i++)
		h2[0][i] = s[i];
	
	for (int h = 0; h + 1 < L; h++)
		for (int i = 0; i < n; i++)
			h2[h + 1][i] = (h2[h][i] + pw[(1 << (L - 2 - h))] * h2[h][i + (1 << h)]) % mod;
}

int query(int i, int k) {
	if (i + (1 << k) > n)
		return 0;

	int l = L - 1 - k;
	LL h = (h1[l][i] - h1[l][i + (1 << k)] * pw[1 << (L - 1)] % mod + mod) % mod;
	return h == h2[k][i];
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9308 KB Output is correct
2 Correct 8 ms 9204 KB Output is correct

Subtask #2
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9308 KB Output is correct
2 Correct 8 ms 9204 KB Output is correct
3 Correct 53 ms 41300 KB Output is correct
4 Correct 57 ms 41300 KB Output is correct
5 Correct 55 ms 41300 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 240 ms 172220 KB Output is correct
2 Correct 264 ms 171860 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9308 KB Output is correct
2 Correct 8 ms 9204 KB Output is correct
3 Correct 53 ms 41300 KB Output is correct
4 Correct 57 ms 41300 KB Output is correct
5 Correct 55 ms 41300 KB Output is correct
6 Correct 240 ms 172220 KB Output is correct
7 Correct 264 ms 171860 KB Output is correct
8 Correct 258 ms 171860 KB Output is correct
9 Correct 250 ms 171880 KB Output is correct
10 Correct 248 ms 171860 KB Output is correct