英文原文
You have a bomb to defuse, and your time is running out! Your informer will provide you with a circular array code
of length of n
and a key k
.
To decrypt the code, you must replace every number. All the numbers are replaced simultaneously.
- If
k > 0
, replace theith
number with the sum of the nextk
numbers. - If
k < 0
, replace theith
number with the sum of the previousk
numbers. - If
k == 0
, replace theith
number with0
.
As code
is circular, the next element of code[n-1]
is code[0]
, and the previous element of code[0]
is code[n-1]
.
Given the circular array code
and an integer key k
, return the decrypted code to defuse the bomb!
Example 1:
Input: code = [5,7,1,4], k = 3 Output: [12,10,16,13] Explanation: Each number is replaced by the sum of the next 3 numbers. The decrypted code is [7+1+4, 1+4+5, 4+5+7, 5+7+1]. Notice that the numbers wrap around.
Example 2:
Input: code = [1,2,3,4], k = 0 Output: [0,0,0,0] Explanation: When k is zero, the numbers are replaced by 0.
Example 3:
Input: code = [2,4,9,3], k = -2 Output: [12,5,6,13] Explanation: The decrypted code is [3+9, 2+3, 4+2, 9+4]. Notice that the numbers wrap around again. If k is negative, the sum is of the previous numbers.
Constraints:
n == code.length
1 <= n <= 100
1 <= code[i] <= 100
-(n - 1) <= k <= n - 1
中文题目
你有一个炸弹需要拆除,时间紧迫!你的情报员会给你一个长度为 n
的 循环 数组 code
以及一个密钥 k
。
为了获得正确的密码,你需要替换掉每一个数字。所有数字会 同时 被替换。
- 如果
k > 0
,将第i
个数字用 接下来k
个数字之和替换。 - 如果
k < 0
,将第i
个数字用 之前k
个数字之和替换。 - 如果
k == 0
,将第i
个数字用0
替换。
由于 code
是循环的, code[n-1]
下一个元素是 code[0]
,且 code[0]
前一个元素是 code[n-1]
。
给你 循环 数组 code
和整数密钥 k
,请你返回解密后的结果来拆除炸弹!
示例 1:
输入:code = [5,7,1,4], k = 3 输出:[12,10,16,13] 解释:每个数字都被接下来 3 个数字之和替换。解密后的密码为 [7+1+4, 1+4+5, 4+5+7, 5+7+1]。注意到数组是循环连接的。
示例 2:
输入:code = [1,2,3,4], k = 0 输出:[0,0,0,0] 解释:当 k 为 0 时,所有数字都被 0 替换。
示例 3:
输入:code = [2,4,9,3], k = -2 输出:[12,5,6,13] 解释:解密后的密码为 [3+9, 2+3, 4+2, 9+4] 。注意到数组是循环连接的。如果 k 是负数,那么和为 之前 的数字。
提示:
n == code.length
1 <= n <= 100
1 <= code[i] <= 100
-(n - 1) <= k <= n - 1
通过代码
高赞题解
class Solution {
public int[] decrypt(int[] code, int k) {
int length = code.length;
int[] result = new int[length];
if (k == 0) {
return result;
} else {
for (int i = 0; i < length; i++) {
int sum = 0;
for (int j = 0; j < Math.abs(k); j++) {
if (k > 0) {
sum += code[(i + j + 1) % length];
} else {
sum += code[(i - j - 1 + length) % length];
}
}
result[i] = sum;
}
}
return result;
}
}
统计信息
通过次数 | 提交次数 | AC比率 |
---|---|---|
7574 | 11633 | 65.1% |
提交历史
提交时间 | 提交结果 | 执行时间 | 内存消耗 | 语言 |
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