Candy Sharing Game
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 4425 Accepted Submission(s): 2698
Problem Description
A number of students sit in a circle facing their teacher in the center. Each student initially has an even number of pieces of candy. When the teacher blows a whistle, each student simultaneously gives half of his or her candy to the neighbor on the right. Any student, who ends up with an odd number of pieces of candy, is given another piece by the teacher. The game ends when all students have the same number of pieces of candy. Write a program which determines the number of times the teacher blows the whistle and the final number of pieces of candy for each student from the amount of candy each child starts with.
Input
The input may describe more than one game. For each game, the input begins with the number N of students, followed by N (even) candy counts for the children counter-clockwise around the circle. The input ends with a student count of 0. Each input number is on a line by itself.
Output
For each game, output the number of rounds of the game followed by the amount of candy each child ends up with, both on one line.
Sample Input
6
36
2
2
2
2
2
11
22
20
18
16
14
12
10
8
6
4
2
4
2
4
6
8
0
Sample Output
15 14
17 22
4 8
题解：深搜一下。。。关键要开两个数组；因为自己给下一个一半的时候自己变了，所以再开个数组记录上一状态；
代码：
#include<iostream>
#include<cstring>
#include<cstdio>
#include<cmath>
#include<vector>
#include<map>
#include<algorithm>
using namespace std;
#define mem(x,y) memset(x,y,sizeof(x))
#define SI(x) scanf("%d",&x)
#define SL(x) scanf("%lld",&x)
#define PI(x) printf("%d",x)
#define PL(x) printf("%lld",x)
#define P_ printf(" ")
#define T_T while(T--)
typedef long long LL;
const int INF=0x3f3f3f3f;
int N;
int m[110],n[110];
int ans;
void dfs(int t){
if(ans)return;
if(*max_element(m,m+N)==*min_element(m,m+N)){
ans=1;
printf("%d %d
",t,m[0]);
return ;
}
for(int i=1;i<N;i++){
m[i]=(n[i-1]+n[i])/2;
if(m[i]&1)m[i]++;
// if(m[i]&1)m[i]++;
}
m[0]=(n[0]+n[N-1])/2;
if(m[0]&1)m[0]++;
for(int i=0;i<N;i++)n[i]=m[i];
// if(m[0]&1)m[0]++;
//for(int i=0;i<N;i++)printf("%d ",m[i]);puts("");
//getchar();
dfs(t+1);
}
int main(){
while(SI(N),N!=0){
for(int i=0;i<N;i++)scanf("%d",&n[i]),m[i]=n[i];
ans=0;
dfs(0);
}
return 0;
}