HDU 5670 Machine

Machine

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 426    Accepted Submission(s): 257

Problem Description

There is a machine with m(2≤m≤30) coloured bulbs and a button.When the button is pushed, the rightmost bulb changes.
For any changed bulb,

if it is red now it will be green;

if it is green now it will be blue;

if it is blue now it will be red and the bulb that on the left(if it exists) will change too.

Initally all the bulbs are red. What colour are the bulbs after the button be
pushed n(1≤n<263) times?

 

Input

There are multiple test cases. The first line of input contains an integerT(1≤T≤15) indicating the number of test cases. For each test case:

The only line contains two integers m(2≤m≤30) and n(1≤n<263).

 

Output

For each test case, output the colour of m bulbs from left to right.
R indicates red. G indicates green. B indicates blue.

 

Sample Input

23 12 3

 

Sample Output

RRGGR

 

Source

BestCoder Round #81 (div.2)

 

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 类似于三进制。。。当时为什么我就没想起来呢

#include<stdio.h>#include<string.h>#include<algorithm>using namespace std;int main(){char s[3]={'R','G','B'},ans[32];int t,m,i;__int64 n;scanf("%d",&t);while(t--){scanf("%d%I64d",&m,&n);for(i=m;i>0;i--){ans[i]=s[n%3];n=n/3;}for(i=1;i<=m;i++)printf("%c",ans[i]);printf("\n");}return 0;}