#include <stdio.h>

int main() {
    int X;
    scanf("%d", &X);

    // 대각선 번호 찾기
    int diagonal = 1;
    while (X > diagonal) {
        X -= diagonal;
        diagonal++;
    }

    // 대각선 내에서 X번째 분수 찾기
    int numerator, denominator;
    if (diagonal % 2 == 1) {
        numerator = diagonal - X + 1;
        denominator = X;
    } else {
        numerator = X;
        denominator = diagonal - X + 1;
    }

    printf("%d/%d\n", numerator, denominator);

    return 0;
}

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

NA==

4