pull/6/head
yuanguangxin 5 years ago
parent bb5208b0cc
commit 4dfbf67583

@ -2,10 +2,9 @@
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@ -0,0 +1,31 @@
package q53.q1;
/**
* o(n)
*/
public class Solution {
public int maxSubArray(int[] nums) {
if (nums.length == 1) {
return nums[0];
}
int sum = nums[0];
int temp = sum;
for (int i = 1; i < nums.length; i++) {
temp = temp + nums[i];
if (temp >= sum) {
sum = temp;
} else if (temp < 0) {
temp = 0;
}
if (nums[i] > sum) {
temp = nums[i];
sum = nums[i];
}
}
return sum;
}
public static void main(String[] args) {
System.out.println(new Solution().maxSubArray(new int[]{-1, 1, 2, 1}));
}
}

@ -0,0 +1,24 @@
package q53.q2;
/**
* dp[i]nums[i] o(n)
*/
public class Solution {
public int maxSubArray(int[] nums) {
int[] dp = new int[nums.length];
dp[0] = nums[0];
int rs = dp[0];
for (int i = 1; i < nums.length; i++) {
int temp = dp[i - 1] + nums[i];
dp[i] = Math.max(nums[i],temp);
rs = Math.max(rs, dp[i]);
}
return rs;
}
public static void main(String[] args) {
System.out.println(new Solution().maxSubArray(new int[]{-2}));
}
}
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