oj.uz

Submission #466745

# Submission time Handle Problem Language Result Execution time Memory
466745 2021-08-20T15:35:05 Z nkato Secret (JOI14_secret) C++17
100 / 100
 533 ms 8224 KB 
#include "secret.h"

int prefix[1000][1000], n;

void populate(int L, int R, int A[]) {
	int mid = (L + R) / 2;
	prefix[mid][mid] = A[mid];
	prefix[mid + 1][mid + 1] = A[mid + 1];

	for (int i = mid + 2; i <= R; i++)
		prefix[mid + 1][i] = Secret(prefix[mid + 1][i - 1], A[i]);
	for (int i = mid - 1; i >= L; i--)
		prefix[mid][i] = Secret(A[i], prefix[mid][i + 1]);

	if (L < mid) populate(L, mid, A);
	if (mid + 1 < R) populate(mid + 1, R, A);
}

void Init(int N, int A[]) {
	n = N;
	populate(0, N - 1, A);
}

int Query(int L, int R) {
	int a = 0, b = n - 1;

	while (a != b) {
		int mid = (a + b) / 2;
		if (mid >= L && mid < R)
			return Secret(prefix[mid][L], prefix[mid + 1][R]);
		else if (mid == R) return prefix[mid][L];
		else if (mid < L) a = mid + 1;
		else b = mid;
	}

	return prefix[a][a];
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 164 ms 4276 KB Output is correct - number of calls to Secret by Init = 3578, maximum number of calls to Secret by Query = 1
2 Correct 145 ms 4332 KB Output is correct - number of calls to Secret by Init = 3586, maximum number of calls to Secret by Query = 1
3 Correct 165 ms 4316 KB Output is correct - number of calls to Secret by Init = 3595, maximum number of calls to Secret by Query = 1
4 Correct 517 ms 8152 KB Output is correct - number of calls to Secret by Init = 7969, maximum number of calls to Secret by Query = 1
5 Correct 513 ms 8052 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
6 Correct 506 ms 8056 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
7 Correct 516 ms 8224 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
8 Correct 516 ms 8152 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
9 Correct 533 ms 8100 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
10 Correct 515 ms 8132 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1