Colidity--CountDiv

 1 // you can use includes, for example:
 2 // #include <algorithm>
 3 
 4 // you can write to stdout for debugging purposes, e.g.
 5 // cout << "this is a debug message" << endl;
 6 
 7 int solution(int A, int B, int K) {
 8     // write your code in C++11
 9     if(A % K ==0)
10     {
11         return (B-A)/K+1;//加上A
12     }
13     else
14     {
15         return (B-(A-A%K))/K;
16     }
17 }