Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length.
Do not allocate extra space for another array, you must do this in place with constant memory.
For example,
Given input array A = [1,1,2]
,
Your function should return length = 2
, and A is now [1,2]
.
#include<stdio.h>
int removeDuplicates(int A[], int n) {
int i,k=1;
int cnt=1;
if(n==0) return 0;
for(i=0; i<n-1; i++){
for(; A[k]<=A[i] && k<n; k++) ;
A[i+1]=A[k];
if(k==n-1 && A[i]<=A[k]) break;
}
for(i=1;i<n;i++){
if(A[i]<=A[i-1]) break;
else cnt++;
}
return cnt;
}
void main()
{
int a[]={1,1,1};
int n=3;
int cnt=removeDuplicates(a,n);
printf("%d\n",cnt);
for(n=0;n<cnt;n++) printf("%d,",a[n]);
}
~
发现自己编的代码好搓,看了看别人写的,好简洁~
int removeDuplicates(int A[], int n) {
if (n == 0)
{
return n;
}
int k = 0;
for (int i = 1; i < n; i++)
{
if (A[i] != A[k])
{
A[++k] = A[i];
}
}
return k + 1;
}