#include <stdio.h>
 int max(int var[],int a)
{
int maxel,i;
maxel=var[0];
for (i=1;i<a;i++)
{if (maxel < var[i])
    {maxel=var[i];} }
return maxel;
}
 int min(int var[],int a)
{
int minel,i;
minel=var[0];
for (i=1;i<a;i++)
{if (minel > var[i])
    {minel=var[i];}}
return minel;
}
int diff(int var[],int a)
{
int max1=max(var, a);
int min1=min(var, a);
int diff1=max1-min1;
return diff1;
}
int sum(int var[],int a)
{
int i, indmin,sum;
sum=0;
int min1=min(var, a);
for (i=(a-1);i>=0;i--)
    {if (var[i] == min1)
        {indmin=i;}}
for (i=0;i<indmin;i++)
    {sum=sum+var[i];}
return sum;
}
int main()
{
int var[100], i, j, nf; char c;
scanf("%d", &nf);
c=' ';
i=0;
while (c != '\n')
    {
    scanf("%d%c", &var[i], &c);
    i++;
    }
if (i > 100)
    {
    printf("%s\n", "Данные некорректны");
    return 0;
    }
switch(nf){
case 0:
    {printf("%d\n", max(var, i));}
case 1:
    {printf("%d\n", min(var, i));}
case 2:
    {printf("%d\n", diff(var, i));}
case 3:
    {printf("%d\n", sum(var,i));}
case 4:
    {
    printf("%s\n", "Данные некорректны");
    return 0;
    }
}
return 0;
}