oj.uz

Submission #837759

# Submission time Handle Problem Language Result Execution time Memory
837759 2023-08-25T15:56:28 Z danitro Secret (JOI14_secret) C++14
100 / 100
 412 ms 4492 KB 
#include <bits/stdc++.h>
#include "secret.h"

using namespace std;

#define MAX 1024

int table[25][MAX], n;

void build(int n, int a[], int l, int r, int level)
{
	if(l > r)return;
	if(l == r)
	{
		table[level][l] = a[l];
		return;
	}
	int mid = (l + r) / 2;
	
	table[level][mid + 1] = a[mid + 1];
	for(int i = mid + 2; i <= r; i++)table[level][i] = Secret(table[level][i - 1], a[i]);
	table[level][mid] = a[mid];
	for(int i = mid - 1; i >= l; i--)table[level][i] = Secret(a[i], table[level][i + 1]);
	
	build(n, a, l, mid, level + 1);
	build(n, a, mid + 1, r, level + 1);
	
	return;
}

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

int Query(int L, int R)
{
	
	int l = 0, r = n - 1, mid, lev = 0, opt;
	while(l <= L && R <= r && r - l > 0)
	{
		mid = (l + r) / 2;
		if(L > mid)l = mid + 1;
		else r = mid;
		opt = lev++;
	}
	if(L == R)return table[opt][L];
	return Secret(table[opt][L], table[opt][R]);
}

Compilation message

secret.cpp: In function 'int Query(int, int)':
secret.cpp:49:15: warning: 'opt' may be used uninitialized in this function [-Wmaybe-uninitialized]
   49 |  return Secret(table[opt][L], table[opt][R]);
      |         ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 110 ms 2492 KB Output is correct - number of calls to Secret by Init = 3578, maximum number of calls to Secret by Query = 1
2 Correct 111 ms 2492 KB Output is correct - number of calls to Secret by Init = 3586, maximum number of calls to Secret by Query = 1
3 Correct 110 ms 2444 KB Output is correct - number of calls to Secret by Init = 3595, maximum number of calls to Secret by Query = 1
4 Correct 380 ms 4388 KB Output is correct - number of calls to Secret by Init = 7969, maximum number of calls to Secret by Query = 1
5 Correct 391 ms 4328 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
6 Correct 385 ms 4404 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
7 Correct 386 ms 4492 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
8 Correct 412 ms 4396 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
9 Correct 390 ms 4344 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
10 Correct 406 ms 4408 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1