I got 0.218, 104Kb with this code:

#include <cstdio>
#include <cstdlib>



int main()
{
     char str[8];
     gets (str);
     int n=atoi(str);

    char s,sum=0;

    int count=0;

    while (n)
    {
        gets(str);

        s=str[0]+str[2];

        if (s==105) {putchar(57); --n;}
        else {sum=s; --n; break; }
    }

    if (!n) return 0;


    for (int i=0; i<n; ++i)
    {
        gets(str);

        s=str[0]+str[2];


        if (s==105) {++count;}
        else
        {


            if (s<=104)
            {

                putchar(sum-48);

                for (; count>0; --count)
                    putchar(57);

                sum=s;

            }
            else
            {

                if (s>=106)
                {

                    putchar(sum-47);

                    for (; count>0; --count)
                    putchar(48);

                sum=s-10;

                }
            }
        }


    }

    if (s==105)
    {

            putchar(sum-48);

        for (; count>0; --count)
                putchar(57);

    }
    else
        if (sum)

            (s>=106)?putchar(s-58):putchar(s-48);
}

Could anyone tell me what should i do to make it faster?