public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

int totalNumber = 0;

int cnt = 0;

int num = scanner.nextInt();

while(true) {

totalNumber += cnt;

if (num <= totalNumber) {

if(cnt%2 ==0) {

System.out.println(num - (totalNumber - cnt) + "/" + ( totalNumber - num +1));

}

else {

System.out.println( (totalNumber - num +1) + "/" + (num - (totalNumber - cnt)));

}

return;

}

cnt++;

}

}