HDU 2608 0 or 1 规律
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0 or 1
Time Limit: 6000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2258 Accepted Submission(s): 555
Problem Description
Solving problem is a interesting thing. Yifenfei like to slove different problem,because he think it is a way let him more intelligent. But as we know,yifenfei is weak in math. When he come up against a difficult math problem, he always try to get a hand. Now the problem is coming! Let we
define T(n) as the sum of all numbers which are positive integers can divied n. and S(n) = T(1) + T(2) + T(3)…..+T(n).
define T(n) as the sum of all numbers which are positive integers can divied n. and S(n) = T(1) + T(2) + T(3)…..+T(n).
Input
The first line of the input contains an integer T which means the number of test cases. Then T lines follow, each line consists of only one positive integers n. You may assume the integer will not exceed 2^31.
Output
For each test case, you should output one lines of one integer S(n) %2. So you may see the answer is always 0 or 1 .
Sample Input
3123
Sample Output
100HintHint S(3) = T(1) + T(2) +T(3) = 1 + (1+2) + (1+3) = 8 S(3) % 2 = 0
Author
yifenfei
Source
奋斗的年代
都能在网上找到规律就是:凡是“能够被完全开方”或者“被2整除后能够完全被开方”的数,它的(T(N) % 2)都是1。
从此我的博客里面多了一个规律的分组。
//15MS228K#include<stdio.h>#include<math.h>int main(){ int t; scanf("%d",&t); while(t--) { int n,count=0; scanf("%d",&n); for(int i=1;i<=n;i++) { if(i*i*2<=n)count++; if(i*i<=n)count++; else break; } printf("%d\n",count%2); } return 0;}
0 0
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