hdu 6130 Kolakoski（多校联赛）

Kolakoski

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 524288/524288 K (Java/Others)
Total Submission(s): 0    Accepted Submission(s): 0

Problem Description

This is Kolakosiki sequence: 1,2,2,1,1,2,1,2,2,1,2,2,1,1,2,1,1,2,2,1……. This sequence consists of 1 and 2, and its first term equals 1. Besides, if you see adjacent and equal terms as one group, you will get 1,22,11,2,1,22,1,22,11,2,11,22,1……. Count number of terms in every group, you will get the sequence itself. Now, the sequence can be uniquely determined. Please tell HazelFan its nth element.

 

Input

The first line contains a positive integer T(1≤T≤5), denoting the number of test cases.
For each test case:
A single line contains a positive integer n(1≤n≤107).

 

Output

For each test case:
A single line contains a nonnegative integer, denoting the answer.

 

Sample Input

212

 

Sample Output

12

水题一道 但是学到了一个新的高深而难懂数列

ac代码：

#include<bits/stdc++.h>#define inf 10000000using namespace std;int a[10000000+5];int ke(){    a[1]=1,a[2]=2,a[3]=2;    int sum=3;    for(int i=3;i<=inf;i++)    {        if(a[i]==2)        {            if(a[sum]==2)            {                a[sum+1]=a[sum+2]=1;            }            if(a[sum]==1)            {                a[sum+1]=a[sum+2]=2;            }        }        if(a[i]==1)        {            if(a[sum]==2)            {                a[sum+1]=1;            }            if(a[sum]==1)            {                a[sum+1]=2;            }        }        sum=sum+a[i];        if(sum>=inf)            break;    }}int main(){    ke();    int t,n;    while(scanf("%d",&t)!=EOF)    {        while(t--)        {            scanf("%d",&n);            printf("%d\n",a[n]);        }    }    return 0;}