P1014 [NOIP1999 普及组] Cantor 表

#include 
using namespace std; 
int main() {
	int n,k=1;
	cin>>n;
	while (n>k) {
		n=n-k;
		k++;
	}
	if(k%2==0) cout<"/"<<(k+1-n);
	else cout<1-n<<"/"<
	return 0;
}