#include<stdio.h>
int main()
{
    int i,s1,s2,cost,flag;
    int price[5]={13,12,9,14,15};
    s1=price[0];
    s2=price[1];
    for (i=2;i<5;i++)
    {
        if(s1>price[i]&&s2>price[i])
        {
            s1=s2;
            s2=price[i];
        }
        if(s2>price[i])
            s2=price[i];
    }
cost=s1+s2;
printf("%d",cost);
return 0;
}