#include<stdio.h>
int main()
{
int n1[4] = { 0 };
int max = 0;
for (int i = 0; i < 4; i++)
{
scanf("%d", &n1[i]);
}
for (int j = 0; j < 4; j++)
{
if (n1[j] > max)
max = n1[j];
}
printf("%d",max);
return 0;
}

#include<stdio.h>
int main()
{
int n1[4] = { 0 };
int max = 0;
for (int i = 0; i < 4; i++)
{
scanf("%d", &n1[i]);
}
for (int j = 0; j < 4; j++)
{
if (n1[j] > max)
max = n1[j];
}
printf("%d",max);
return 0;
}