HDU-5980

Find Small A

Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 2268 Accepted Submission(s): 1083

Problem Description

As is known to all,the ASCII of character 'a' is 97. Now,find out how many character 'a' in a group of given numbers. Please note that the numbers here are given by 32 bits’ integers in the computer.That means,1digit represents 4 characters(one character is represented by 8 bits’ binary digits).

Input

The input contains a set of test data.The first number is one positive integer N (1≤N≤100),and then N positive integersai (1≤ ai≤2^32 - 1) follow

Output

Output one line,including an integer representing the number of 'a' in the group of given numbers.

Sample Input

3
97 24929 100

Sample Output

3

关于二进制的理解应用问题，8位即2^8==256，则每个数%256若==97，则sum++

AC代码：

 #include<bits/stdc++.h>

 using namespace std;

 int main(){

     ios::sync_with_stdio(false);

     int t,x;

     cin>>t;

     int sum=;

     while(t--){

         cin>>x;

         while(x>){

             if(x%==){

                 sum++;

             }

             x/=;

         }

     }

     cout<<sum<<endl;

     return ;

 }

巴特西

HDU-5980

Find Small A

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