pta5

#include <stdio.h>
    int gcd(int m,int n)
    {
        while (n) {
            int t = n;
            m %= n;
            n = m;
            m = t;
        }
        return m;
    }


int main() {
    int N;
    scanf("%d", &N);
    int i,a[N],b[N];
    int x,y,c,d,m,n;
    for (i = 0; i < N; i++) {
        scanf("%d/%d", &a[i], &b[i]);
    }
    x = a[0];
    y = b[0];
    for (i = 1; i < N; i++) {
        x = x * b[i] + a[i] * y;
        y *= b[i];    
    
        c = gcd(x, y);
        if(c!=0){
            x /= c;
            y /= c;
        }
    }
    if(x == 0 && y != 0){
        printf("0");
    }else{
        d = x/y;
        x %= y;
        
        if (d != 0 && x != 0) {
            printf("%d %d/%d", d, x, y);
        }
        else if (d != 0 && x == 0) {
            printf("%d", d);
        }
        else {
            printf("%d/%d",x, y);
        }
    }
    return 0;
}