#include <stdio.h>
int main()
{
int n = 0, max = 0;
for(int i = 0; i < 4; i++)
{
scanf("%d", &n);
max = (max > n ? max : n);
}
printf("%d", max);
return 0;
}

#include <stdio.h>
int main()
{
int n = 0, max = 0;
for(int i = 0; i < 4; i++)
{
scanf("%d", &n);
max = (max > n ? max : n);
}
printf("%d", max);
return 0;
}