NYOJ 412 Same binary weight

Same binary weight

时间限制： 300 ms  |  内存限制： 65535 KB

难度： 3

描述

The binary weight of a positive  integer is the number of 1's in its binary representation.for example,the decmial number 1 has a binary weight of 1,and the decimal number 1717 (which is 11010110101 in binary) has a binary weight of 7.Give a positive integer N,return the smallest integer greater than N that has the same binary weight as N.N will be between 1 and 1000000000,inclusive,the result is guaranteed to fit in a signed 32-bit interget.

输入

The input has multicases and each case contains a integer N.

输出

For each case,output the smallest integer greater than N that has the same binary weight as N.

样例输入

1717
4
7
12
555555

样例输出

1718
8
11
17
555557

解题思路：就是将第一个0变成1，最后一个1变成0。

AC代码：

View Code 
 #include
 #include
 #include
 using namespace std;
 int main()
 {
     int n;
     while(cin>>n)
     {
         int t,t1,t2;
         t=n;
         int tt=n&-n;
         if(t==tt)  
         {
             n=n<<1;
             cout<2*t1)
             {
                 t1=t1<<1;
                 n=n-s+t1+pow(2,c-1)-1;
                 break;
             }
         }
         if(t==0)n=(t1<<1)+pow(2,c-1)-1;
         cout<