msb-public-java
/
LeetCode
mirror of https://github.com/yuanguangxin/LeetCode
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2
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add q42

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pull/6/head
yuanguangxin 5 years ago
parent f2064cbc45
commit a3277ce348
2 changed files with 77 additions and 43 deletions
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93
.idea/workspace.xml
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@ -2,9 +2,8 @@
<project version="4"> <project version="4">
<component name="ChangeListManager"> <component name="ChangeListManager">
<list default="true" id="af7ffdf2-4ddc-4ed6-8222-60ed5acbc2ed" name="Default Changelist" comment=""> <list default="true" id="af7ffdf2-4ddc-4ed6-8222-60ed5acbc2ed" name="Default Changelist" comment="">
<change afterPath="$PROJECT_DIR$/src/q1277/Solution.java" afterDir="false" /> <change afterPath="$PROJECT_DIR$/src/q42/Solution.java" afterDir="false" />
<change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" /> <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
<change beforePath="$PROJECT_DIR$/Rocket.md" beforeDir="false" afterPath="$PROJECT_DIR$/Rocket.md" afterDir="false" />
</list> </list>
<option name="SHOW_DIALOG" value="false" /> <option name="SHOW_DIALOG" value="false" />
<option name="HIGHLIGHT_CONFLICTS" value="true" /> <option name="HIGHLIGHT_CONFLICTS" value="true" />
@ -79,13 +78,13 @@
<recent name="$PROJECT_DIR$/src/q206/f1" /> <recent name="$PROJECT_DIR$/src/q206/f1" />
</key> </key>
</component> </component>
<component name="RunManager" selected="Application.Solution (3)"> <component name="RunManager" selected="Application.Solution (4)">
<configuration name="Main" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true"> <configuration name="Solution (1)" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="etc.tree.traversal.Main" /> <option name="MAIN_CLASS_NAME" value="q98.f3.Solution" />
<module name="LeetCode" /> <module name="LeetCode" />
<extension name="coverage"> <extension name="coverage">
<pattern> <pattern>
<option name="PATTERN" value="etc.tree.traversal.*" /> <option name="PATTERN" value="q98.f3.*" />
<option name="ENABLED" value="true" /> <option name="ENABLED" value="true" />
</pattern> </pattern>
</extension> </extension>
@ -93,12 +92,12 @@
<option name="Make" enabled="true" /> <option name="Make" enabled="true" />
</method> </method>
</configuration> </configuration>
<configuration name="Solution (1)" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true"> <configuration name="Solution (2)" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="q98.f3.Solution" /> <option name="MAIN_CLASS_NAME" value="q110.Solution" />
<module name="LeetCode" /> <module name="LeetCode" />
<extension name="coverage"> <extension name="coverage">
<pattern> <pattern>
<option name="PATTERN" value="q98.f3.*" /> <option name="PATTERN" value="q110.*" />
<option name="ENABLED" value="true" /> <option name="ENABLED" value="true" />
</pattern> </pattern>
</extension> </extension>
@ -106,12 +105,12 @@
<option name="Make" enabled="true" /> <option name="Make" enabled="true" />
</method> </method>
</configuration> </configuration>
<configuration name="Solution (2)" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true"> <configuration name="Solution (3)" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="q110.Solution" /> <option name="MAIN_CLASS_NAME" value="q1277.Solution" />
<module name="LeetCode" /> <module name="LeetCode" />
<extension name="coverage"> <extension name="coverage">
<pattern> <pattern>
<option name="PATTERN" value="q110.*" /> <option name="PATTERN" value="q1277.*" />
<option name="ENABLED" value="true" /> <option name="ENABLED" value="true" />
</pattern> </pattern>
</extension> </extension>
@ -119,12 +118,12 @@
<option name="Make" enabled="true" /> <option name="Make" enabled="true" />
</method> </method>
</configuration> </configuration>
<configuration name="Solution (3)" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true"> <configuration name="Solution (4)" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="q1277.Solution" /> <option name="MAIN_CLASS_NAME" value="q42.Solution" />
<module name="LeetCode" /> <module name="LeetCode" />
<extension name="coverage"> <extension name="coverage">
<pattern> <pattern>
<option name="PATTERN" value="q1277.*" /> <option name="PATTERN" value="q42.*" />
<option name="ENABLED" value="true" /> <option name="ENABLED" value="true" />
</pattern> </pattern>
</extension> </extension>
@ -173,11 +172,11 @@
</configuration> </configuration>
<recent_temporary> <recent_temporary>
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<item itemvalue="Application.Solution (4)" />
<item itemvalue="Application.Solution (3)" /> <item itemvalue="Application.Solution (3)" />
<item itemvalue="Application.Solution (2)" /> <item itemvalue="Application.Solution (2)" />
<item itemvalue="Application.Solution" /> <item itemvalue="Application.Solution" />
<item itemvalue="Application.Solution (1)" /> <item itemvalue="Application.Solution (1)" />
<item itemvalue="Application.Main" />
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@ -218,7 +217,7 @@
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<workItem from="1581061282899" duration="41783000" /> <workItem from="1581061282899" duration="47765000" />
</task> </task>
<task id="LOCAL-00001" summary="add q5/q7/q172"> <task id="LOCAL-00001" summary="add q5/q7/q172">
<created>1580045439607</created> <created>1580045439607</created>
@ -318,7 +317,14 @@
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<updated>1581270301073</updated> <updated>1581270301073</updated>
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<option name="localTasksCounter" value="15" /> <task id="LOCAL-00015" summary="add q1277">
<created>1581441609925</created>
<option name="number" value="00015" />
<option name="presentableId" value="LOCAL-00015" />
<option name="project" value="LOCAL" />
<updated>1581441609925</updated>
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<option name="localTasksCounter" value="16" />
<servers /> <servers />
</component> </component>
<component name="TypeScriptGeneratedFilesManager"> <component name="TypeScriptGeneratedFilesManager">
@ -339,7 +345,8 @@
<MESSAGE value="add q94/98/144/145" /> <MESSAGE value="add q94/98/144/145" />
<MESSAGE value="update q98" /> <MESSAGE value="update q98" />
<MESSAGE value="add q110/q450/q701" /> <MESSAGE value="add q110/q450/q701" />
<option name="LAST_COMMIT_MESSAGE" value="add q110/q450/q701" /> <MESSAGE value="add q1277" />
<option name="LAST_COMMIT_MESSAGE" value="add q1277" />
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27
src/q42/Solution.java
Unescape View File

@ -0,0 +1,27 @@
package q42;
/**
* 暴力法o(n^2) 找出每个元素（柱子）上面的水量，可提前存储最大高度数组（两个左和右），最后遍历一次优化为o(n)
*/
public class Solution {
public int trap(int[] height) {
int ans = 0;
int size = height.length;
for (int i = 1; i < size - 1; i++) {
int maxLeft = 0, maxRight = 0;
for (int j = i; j >= 0; j--) {
maxLeft = Math.max(maxLeft, height[j]);
}
for (int j = i; j < size; j++) {
maxRight = Math.max(maxRight, height[j]);
}
ans += Math.min(maxLeft, maxRight) - height[i];
}
return ans;
}
public static void main(String[] args) {
new Solution().trap(new int[]{0, 1, 0, 2, 1, 0, 1, 3, 2, 1, 2, 1});
}
}
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