Switch Game
Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 8468 Accepted Submission(s): 5017
Problem Description
There are many lamps in a line. All of them are off at first. A series of operations are carried out on these lamps. On the i-th operation, the lamps whose numbers are the multiple of i change the condition ( on to off and off to
on ).
Input
Each test case contains only a number n ( 0< n<= 10^5) in a line.
Output
Output the condition of the n-th lamp after infinity operations ( 0 - off, 1 - on ).
/*
题意:
一条线上有无数个灯,刚开始都是off状态,现在进行下列操作:第几下按开关,就将灯的编号能整除i的等置为相反的
状态,灯的编号为1.....inf。
思路:
类似于打表,由于n<=1000000,所以枚举100000次操作,在每次操作中将相关的灯置为相反的状态。
*/
#include<iostream>
using namespace std ;
#define MAX 100003
int a[MAX];
void fun()
{
memset(a , 0 , sizeof(a)) ;
for( int i = 1; i <= 100000 ; i ++) //枚举100000个操作,并在每个操作中中将相关等状态置为相反
{
for( int j = i ; j <= 100000 ; j += i )
if(a[j])
a[j] = 0;
else
a[j] = 1;
}
}
int main(void)
{
fun();
int n ;
while(cin >>n )
{
cout << a[n] << endl;
}
return 0 ;
}
Sample Input
1 5
Sample Output
1 0