UVa11526 H(n)

http://blog.csdn.net/synapse7/article/details/12873437

 #include<cstdio>
 #include<cstring>
 #include<cstdlib>
 #include<algorithm>
 #include<iostream>

 using namespace std;

 typedef long long LL;

 #include<cmath>
 LL H(int n) {
     LL res = ;
     int m = floor(sqrt(n + 0.1));
     for(int i = ; i <= m; i++) {
         res += n / i;
     }
     return (res << ) - m * m;
 }

 int main() {
     int T, n; scanf("%d", &T);
     while(T--) {
         scanf("%d", &n);
         printf("%lld\n", H(n));
     }

     return ;
 }