#include <stdio.h>
#include <stdlib.h>
//http://blog.csdn.net/wumuzi520/article/details/7378306
int findLength(int * src,int *tmp,int len){
  int maxLen=0;
  for(int i=len-1;i>=0;i--){
        int max=0;//表示以src[i]開頭的最長遞減子序列的長度
    for(int j=i+1;j<len;j++){
        if(src[j]<src[i])
        max=max<tmp[j]?tmp[j]:max;
    }
    tmp[i]=max+1;
    maxLen=maxLen<tmp[i]?tmp[i]:maxLen;
  }
  return maxLen;
}

void printSeq(int* src,int *tmp,int maxLen,int len){
    for(int i=0;i<len;i++){
        if(tmp[i]==maxLen){
            printf("%d\n",src[i]);
            maxLen--;
        }
    }
}








int main()
{
    int test[]={9,8,7,6,5,4,5,67,66,65,64,63,62};
    //這裡要一個輔助陣列
    int len=sizeof(test)/sizeof(int);
    int *tmp=(int*)malloc(len*sizeof(int));
    memset(tmp,0,len*sizeof(int));
    int decreaseLen=findLength(test,tmp,len);
    printf("the length of decreasing sequence is %d\n",decreaseLen);
    printSeq(test,tmp,decreaseLen,len);
    free(tmp);
    return 0;
}