jump game

Author: cshanbo

385.cpp

@@ -4,7 +4,7 @@ Program: Mini Parser
 Description: 
 Author: [email protected]
 Date: 2016-08-17 14:21:22
-Last modified: 2016-08-17 14:22:10
+Last modified: 2016-08-17 14:27:22
 GCC version: 4.9.3
 *****************************************/
 

41.cpp

@@ -0,0 +1,30 @@
+//coding:utf-8
+/*****************************************
+Program: First missing positive
+Description: 
+Author: [email protected]
+Date: 2016-08-17 14:54:37
+Last modified: 2016-08-17 15:02:25
+GCC version: 4.9.3
+*****************************************/
+
+//put every integer into corresponding position
+//1 into A[1], 5 into A[5], etc
+
+#include <vector>
+
+class Solution {
+public:
+    int firstMissingPositive(vector<int>& A) {
+        const int n = A.size();
+        for(int i = 0; i < n; ++ i)
+            while(A[i] > 0 && A[i] <= n && A[A[i] - 1] != A[i])
+                swap(A[i], A[A[i] - 1]);
+
+        for(int i = 0; i < n; ++ i)
+            if(A[i] != i + 1)
+                return i + 1;
+
+        return n + 1;
+    }
+};

55.cpp

@@ -0,0 +1,37 @@
+//coding:utf-8
+/*****************************************
+Program: Jump Game
+Description: 
+Author: [email protected]
+Date: 2016-08-17 15:19:33
+Last modified: 2016-08-17 15:19:54
+GCC version: 4.9.3
+*****************************************/
+
+#include <vector>
+
+class Solution {
+    bool helper(vector<int>& nums, int e){
+        if(e == 0)
+            return true;
+        if(nums[e - 1] >= 1)
+            return helper(nums, e - 1);
+        else{
+            if(e - 1 == 0)
+                return false;
+            for(int i = e - 2; i >= 0; i--){
+                if(nums[i] >= e - i){
+                    if(i >= 1)
+                        return helper(nums, i);
+                    else
+                        return true;
+                }
+            }
+            return false;
+        }
+    }
+public:
+    bool canJump(vector<int>& nums) {
+        return helper(nums, nums.size() - 1);
+    }
+};

6.cpp

@@ -4,10 +4,12 @@ Program: zigzag
 Description: 
 Shanbo Cheng: [email protected]
 Date: 2016-07-19 08:25:26
-Last modified: 2016-07-19 08:25:39
+Last modified: 2016-08-17 14:33:24
 GCC version: 4.7.3
 */
 
+#include <string>
+
 class Solution {
 public:
     string convert(string s, int numRows) {

99.cpp

@@ -4,7 +4,7 @@
 Description: 
 Shanbo Cheng: [email protected]
 Date: 2016-08-10 14:03:25
-Last modified: 2016-08-11 13:04:08
+Last modified: 2016-08-17 10:50:49
 GCC version: 4.9.3
 ***********************************************************/
 /**
@@ -20,6 +20,8 @@ GCC version: 4.9.3
 //inorder traverse, the first element is the one bigger than the successor 
 //second element is the one smaller the previous ones
 //
+#include "misc.h"
+
 class Solution {
     TreeNode* first;
     TreeNode* second;