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#include <stdio.h>
int main()
{
int n,t,r;
while(scanf("%d",&n)!=EOF)
{
t=n/2; r=n-t;
printf("%d\n",t*(t-1)/2+r*(r-1)/2);
}
return 0;
}
int main()
{
int n,t,r;
while(scanf("%d",&n)!=EOF)
{
t=n/2; r=n-t;
printf("%d\n",t*(t-1)/2+r*(r-1)/2);
}
return 0;
}
]]>
#include<stdio.h>
#include<math.h>
int main()
{
int n,a;
scanf("%d",&n);
while(n--)
{
scanf("%d",&a);
printf("%d\n",(int)sqrt(a*1.0));
}
return 0;
}
#include<math.h>
int main()
{
int n,a;
scanf("%d",&n);
while(n--)
{
scanf("%d",&a);
printf("%d\n",(int)sqrt(a*1.0));
}
return 0;
}
]]>