35. Search Insert Position
Problem's Link
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Mean:
给定一个有序数组和一个数k,求k在这个数组中插入的下标.
analyse:
二分查找.
Time complexity: O(N)
view code
/**
* -----------------------------------------------------------------
* Copyright (c) 2016 crazyacking.All rights reserved.
* -----------------------------------------------------------------
* Author: crazyacking
* Date : 2016-03-02-08.49
*/
#include <queue>
#include <cstdio>
#include <set>
#include <string>
#include <stack>
#include <cmath>
#include <climits>
#include <map>
#include <cstdlib>
#include <iostream>
#include <vector>
#include <algorithm>
#include <cstring>
using namespace std;
typedef long long( LL);
typedef unsigned long long( ULL);
const double eps( 1e-8);
class Solution
{
public :
int searchInsert( vector < int >& nums , int target)
{
int len = nums . size();
if( len == 0 || target <= nums [ 0 ])
return 0;
if( target > nums [ len - 1 ])
return len;
int low = 0 , high = len - 1;
while( low <= high)
{
int mid =( low + high) >> 1;
if( target < nums [ mid ])
{
if( mid - 1 >= 0 && target > nums [ mid - 1 ])
return mid;
high = mid - 1;
}
else if( target > nums [ mid ])
{
if( mid + 1 < len && target < nums [ mid + 1 ])
return mid + 1;
low = mid + 1;
}
else
return mid;
}
}
};
int main()
{
Solution solution;
int n , k;
while( cin >>n >> k)
{
vector < int > ve;
for( int i = 0; i <n; ++ i)
{
int tempVal;
cin >> tempVal;
ve . push_back( tempVal);
}
cout << "pos=" << solution . searchInsert( ve , k) << endl;
}
return 0;
}
/*
*/
* -----------------------------------------------------------------
* Copyright (c) 2016 crazyacking.All rights reserved.
* -----------------------------------------------------------------
* Author: crazyacking
* Date : 2016-03-02-08.49
*/
#include <queue>
#include <cstdio>
#include <set>
#include <string>
#include <stack>
#include <cmath>
#include <climits>
#include <map>
#include <cstdlib>
#include <iostream>
#include <vector>
#include <algorithm>
#include <cstring>
using namespace std;
typedef long long( LL);
typedef unsigned long long( ULL);
const double eps( 1e-8);
class Solution
{
public :
int searchInsert( vector < int >& nums , int target)
{
int len = nums . size();
if( len == 0 || target <= nums [ 0 ])
return 0;
if( target > nums [ len - 1 ])
return len;
int low = 0 , high = len - 1;
while( low <= high)
{
int mid =( low + high) >> 1;
if( target < nums [ mid ])
{
if( mid - 1 >= 0 && target > nums [ mid - 1 ])
return mid;
high = mid - 1;
}
else if( target > nums [ mid ])
{
if( mid + 1 < len && target < nums [ mid + 1 ])
return mid + 1;
low = mid + 1;
}
else
return mid;
}
}
};
int main()
{
Solution solution;
int n , k;
while( cin >>n >> k)
{
vector < int > ve;
for( int i = 0; i <n; ++ i)
{
int tempVal;
cin >> tempVal;
ve . push_back( tempVal);
}
cout << "pos=" << solution . searchInsert( ve , k) << endl;
}
return 0;
}
/*
*/