通过率只有60
#include "bits/stdc++.h"
using namespace std;
int main(){
int m,n,a;
int sum1,sum2;
scanf("%d""%d""%d",&m,&n,&a);
if(m%a==0)
sum1=m/a;
else
sum1=m/a+1;
if(n%a==0)
sum2=n/2;
else sum2=n/a+1;
printf("%d",sum1*sum2);
return 0;
}
using namespace std;
int main(){
int m,n,a;
int sum1,sum2;
scanf("%d""%d""%d",&m,&n,&a);
if(m%a==0)
sum1=m/a;
else
sum1=m/a+1;
if(n%a==0)
sum2=n/2;
else sum2=n/a+1;
printf("%d",sum1*sum2);
return 0;
}
