查找具有给定sum子数组的子数组应该是连续的。
这个问题来自GeeksForGeeks。 enter link description here
int subArraySum(int arr[], int n, int sum)
{
/* Initialize curr_sum as value of first element
and starting point as 0 */
int curr_sum = arr[0], start = 0, i;
/* Add elements one by one to curr_sum and if the curr_sum exceeds the
sum, then remove starting element */
for (i = 1; i <= n; i++)
{
// If curr_sum exceeds the sum, then remove the starting elements
while (curr_sum > sum && start < i-1) // Check This
{
curr_sum = curr_sum - arr[start];
start++;
}
// If curr_sum becomes equal to sum, then return true
if (curr_sum == sum)
{
printf ("Sum found between indexes %d and %d", start, i-1);
return 1;
}
// Add this element to curr_sum
if (i < n)
curr_sum = curr_sum + arr[i];
}
// If we reach here, then no subarray
printf("No subarray found");
return 0;
}
在此我们使用条件 while(curr_sum&gt; sum&amp;&amp; start&lt; i-1)。我认为我们不需要将开始与i-1进行比较。我们只能在(curr_sum&gt; sum)时执行此。请回复。
答案 0 :(得分:0)
你在某种程度上是正确的,但更接近检查问题定义:
输入:arr [] = {1,4},sum = 0
输出:未找到子阵列
通过提议的修改,算法的行为会有所不同。