#include <stdio.h>
int main()
{
int N;/* code */
scanf("%d",&N);
int data[1000];
int i;
for (i = 1; i <= 1000; ++i)
{
data[i]=i*(i+1)/2;/* code */
}
for (i = 1; ; ++i)
{
if(N<=data[i])/* code */
break;
}
i = i--;
int t;
t = i % 2;
int m,n;
n = N - data[i-1];
m = data[i] + 1 - N;
if (t == 0/* condition */)
{
printf("%d/%d",n,m);/* code */
}
if (t == 1/* condition */)
{
printf("%d/%d",m,n);/* code */
}
return 0;
}
@cpuandusb